(Current version containing all changes through 3/15/94) DATA USERS GUIDES 1: Digital Line Graphs from 1:24,000-Scale Maps 2: Digital Line Graphs from 1:100,000-Scale Maps 3: Digital Line Graphs from 1:2,000,000-Scale Maps 4: Land Use and Land Cover Digital Data from 1:250,000- and 1:100,000-Scale Maps 5: Digital Elevation Models 6: Geographic Names Information System 7: Alaska Interim Land Cover Mapping Program Data Users Guides 1-7 generally replace the Geological Survey Circular 895. Questions regarding availability and ordering of US GeoData (all types of digital cartographic and geographic data produced and distributed by the U.S. Geological Survey) should be addressed to: Earth Science Information Center U.S. Geological Survey 507 National Center Reston, Virginia 22092 (703)860-6045 Technical questions and comments should be addressed to: Branch of Technical Management U.S. Geological Survey 510 National Center Reston, Virginia 22092 UNITED STATES DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY DIGITAL LINE GRAPHS FROM 1:24,000-SCALE MAPS _______________________________________________________________ Data Users Guide 1 Reston, Virginia 1990 First printing, 1986 Second printing (revised), 1990 CONTENTS Page Introduction . . . . . . . . . . . . . . . . . . . . . . . . . .1 Data content . . . . . . . . . . . . . . . . . . . . . . . . . .2 Data structure . . . . . . . . . . . . . . . . . . . . . . . . .3 Levels of structuring . . . . . . . . . . . . . . . . . . .3 Topology . . . . . . . . . . . . . . . . . . . . . . . . .4 Topological elements. . . . . . . . . . . . . . . . . . . .4 Attribute codes. . . . . . . . . . . . . . . . . . . . . . . . .4 Major attribute codes . . . . . . . . . . . . . . . . . . .6 Minor attribute codes . . . . . . . . . . . . . . . . . . .6 Sample attribute codes. . . . . . . . . . . . . . . . . . .7 Sample line graph structure. . . . . . . . . . . . . . . . . . .8 Graph theory in DLG data . . . . . . . . . . . . . . . . . . . 10 Area case . . . . . . . . . . . . . . . . . . . . . . . . 10 Network case. . . . . . . . . . . . . . . . . . . . . . . 11 Area-Hybrid case. . . . . . . . . . . . . . . . . . . . . 11 Distribution formats . . . . . . . . . . . . . . . . . . . . . 17 Source materials . . . . . . . . . . . . . . . . . . . . . . . 18 Cell size and file extent. . . . . . . . . . . . . . . . . . . 18 Coordinate systems . . . . . . . . . . . . . . . . . . . . . . 18 Standard distribution format. . . . . . . . . . . . . . . 18 Optional distribution format. . . . . . . . . . . . . . . 19 Data validation. . . . . . . . . . . . . . . . . . . . . . . . 19 Appendix A.Standard DLG distribution format (record contents). 25 B. Optional DLG distribution format (record contents). . 36 C. Map projection parameters . . . . . . . . . . . . . . 49 D. DLG attribute codes . . . . . . . . . . . . . . . . . 50 E. Coordinate conversion . . . . . . . . . . . . . . . . 71 F. Sample DLG data file (standard distribution format) . 72 G. Sample DLG data file (optional distribution format) . 76 H. Pre-1983 Hydrographic attribute codes . . . . . . . . 79 I. Pre-1985 Transportation attribute codes . . . . . . . 85 J. Pre-1985 Other Significant Cultural Feature attribute codes92 K. Origins of the U.S. Rectangular Surveys . . . . . . . 97 L. Named Land Grant codes. . . . . . . . . . . . . . . . 98 ILLUSTRATIONS Page Figure 1. Map elements showing roads, railroads, buildings, streams, and lake and forest areas . . . . . . . . 5 2. Sample line graph . . . . . . . . . . . . . . . . . 8 3. Window from the Oneco, Connecticut-Rhode Island, USGS 1:24,000-scale quadrangle map . . . . . . . .12 4. Window from the line graph of hydrography, Oneco, Connecticut-Rhode Island, quadrangle . . . . . . .13 5. Location of origin of file reference coordinates. .19 TABLES Page Table 1. Major codes used for DLG base categories . . . . . . 6 2. Digital description of sample DLG-3. . . . . . . . . 9 3. Selected sample of standard format DLG-3 records for Oneco, Connecticut-Rhode Island, hydrography . . . .14 4. Standard and optional DLG format . . . . . . . . . .17 DIGITAL LINE GRAPHS FROM 1:24,000-SCALE MAPS _______________________________________________________________ INTRODUCTION The Earth Science Information Centers (ESIC) distribute digital cartographic/geographic data files produced by the U.S. Geological Survey (USGS) as part of the National Mapping Program. Digital cartographic data files are grouped into four basic types. The first of these, called a Digital Line Graph (DLG), is line map information in digital form. These data files include information on planimetric base categories, such as transportation, hydrography, and boundaries. The second type, called a Digital Elevation Model (DEM), consists of a sampled array of elevations for a number of ground positions that are usually at regularly spaced intervals. The third type is Land Use and Land Cover digital data, which provides information on nine major classes of land use such as urban, agricultural, or forest as well as associated map data such as political units and Federal land ownership. The fourth type, the Geographic Names Information System, provides primary information for all known places, features, and areas in the United States identified by a proper name. The digital cartographic data files from selected quadrangles currently available from ESIC include the following: o Digital Line Graphs (DLG ) --1.24,000-scale --1:62,500-scale --1:63,360-scale --1:100,000-scale --1:2,000,000-scale o Digital Elevation Models (DEM) --7.5-minute --15-minute --30-minute --1-degree o Land Use and Land Cover digital data --1:250,000- and 1:100,000-scale Land Use and Land Cover and associated maps --1:250,000-scale Alaska Interim Land Cover o Geographic Names The digital data are useful for the production of cartographic products such as plotting base maps and for various kinds of spatial analysis. A major use of these digital cartographic/geographic data is to combine them with other geographically referenced data enabling scientists to conduct automated analysis in support of various decision making processes. _______________ Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government. Manuscript approved for publication September 4, 1986. This document describes the Digital Line Graphs (DLG's) prepared primarily from the 1:24,000 materials associated with the USGS Topographic Map Series. The series will eventually provide complete national coverage. DATA CONTENT The DLG data files derived from the 1:24,000-scale and other large-scale maps contain selected base categories of cartographic data in digital form; these data categories do not necessarily correspond to the traditional feature separates associated with the maps. The attribute coding scheme for these data has undergone several revisions since the start of the digital program. A major revision of these codes has been printed as Standards for Digital Line Graphs - Part 3, Attribute Coding, which is available for purchase from a USGS ESIC office (see the ordering information inside the front cover). Currently, DLG data entered in the National Digital Cartographic Data Base (NDCDB) are coded in accordance with the Standards for Digital Line Graphs. The implementation of the new coding standards will require the updating of existing files in the NDCDB in order to have a consistent product available for users. Software and procedures are being developed to convert existing data files to these codes during the next several years. Priority will be given to converting files retrieved in response to sales requests. In the meantime, a data base query will provide identification of the coding scheme used for any file in the NDCDB. This information will be supplied to customers when orders are submitted, and upon transmittal of data files. The following categories are included in current large-scale DLG files: o Boundaries -- This category of data consists of (1) political boundaries that identify States, counties, cities, and other municipalities, and (2) administrative boundaries that identify areas such as National and State forests. Political and administrative boundaries are always collected as a single data set. o Hydrography -- This category of data is currently being collected as combined hydrography consisting of all flowing water, standing water, and wetlands. Prior to l983, hydrographic data were differentiated into two components: streams and water bodies. Streams represent flowing water and were digitized as a network intended for hydrologic flow modeling. Streams included the banks of double-line rivers and centerline connectors placed through double-line rivers and lakes. Water bodies include standing water such as lakes and ponds. Wetlands and coastal hydrographic data were not collected. Appendix H contains a list of the attribute codes used in these files. o Public Land Survey System (PLSS) -- This category of data describes the rectangular system of land surveys that is administered by the U.S. Bureau of Land Management. PLSS data are only collected for areas falling solely, or in part, within the States that were formed from the public domain. The PLSS subdivides the public domain and represents property boundaries or references to property boundaries. These DLG data are not intended to be official or authoritative. They are presented as cartographic reference information. The only legal basis for determining land boundaries remains the original survey. o Transportation -- This category of data includes major transportation systems collected in three separate overlays labeled: (1) Roads and Trails, (2) Railroads, and (3) Pipelines, Transmission Lines, and Miscellaneous Transportation Features. In the last quarter of 1985, new transportation attribute codes were implemented. The principal difference between the old and new coding schemes is that under the old transportation subcategory, certain miscellaneous transportation features were not collected and descriptive attribute codes were not used. Appendix I contains a list of the attribute codes formerly used. o Other Significant Manmade Structures -- This category of data includes miscellaneous cultural features not included in the other major data categories. New attribute codes for Other Significant Manmade Structures were implemented in the last quarter of 1985. Very little data from this category currently reside in the NDCDB. Appendix J contains a list of the attribute codes used for these older files. The attribute codes for the following base categories were newly defined in late 1985. Currently, there are very little data available in these categories. o Hypsography -- This category of data consists of information on topographic relief (primarily contour data). o Surface Cover -- This category of data consists of information about vegetative surface cover such as woods, scrub, orchards, and vineyards. Vegetative features associated with wetlands, such as marshes and swamps, are collected under Hydrography. o Non-Vegetative Surface Features -- This category of data consists of information about the natural surface of the Earth as symbolized on the map such as lava, sand, and gravel features. This category is not all-inclusive, as other non-vegetative surface features are found in the category of Hydrography. o Survey Control and Markers -- This category of data consists of information about the points of established position and third-order or better elevations that are used as fixed references in positioning and correlating map features. DATA STRUCTURE Levels of Structuring The term Digital Line Graph (DLG) is used by the USGS to describe a digital map data set in vector form. Originally, three levels of DLG data (DLG-1, DLG-2, and DLG-3) were envisioned; these levels were differentiated by their positional accuracy, level of attribute coding, and relational spatial information. It was found, however, that the widest user-community would be served by producing DLG-3 data, which have the full range of attribute codes and are fully topologically structured. These two properties are required by users whose work includes both graphic and analytic applications. Therefore, all DLG data in the National Digital Cartographic Data Base are level 3. Topology Current data collection from 1:24,000-scale and other large-scale maps is exclusively directed toward producing fully topologically structured level 3 DLG data referred to as DLG-3. The DLG-3 concept is based on graph theory in which a two-dimensional diagram is expressed as a set of nodes (topologically significant points), lines, and areas in a manner that explicitly expresses logical relationships. Applied to a map, this concept is used to encode the digital data with the spatial relationships between map elements which are obvious when the map is examined visually. The spatial relationships include such concepts as adjacency and connectivity between features on the map. The abstraction of the map data according to the rules of graph theory preserves the spatial relationships inherent in the map graphic and creates a logical and consistent data file structure for computer processing. A digital file of cartographic or geographic data that maintains the spatial relationships inherent in the map is called a topologically structured data file. A topologically structured data file can support simple graphic applications, such as plotting streams and roads for base maps, as well as more advanced applications, such as computations and analyses involving areas and lines and their spatial relationships. Topological Elements A DLG-3 file is composed of three separate, but related, elements: nodes, lines, and area identifiers. Nodes define the location of the endpoints of every line, and a single node may mark the start or end of one or more lines. Thus, nodes occur at intersections of linear features and other places on linear features where the feature is subdivided into separate line segments. A line is an ordered set of points that describes the position and shape of a linear feature on the map. Each line starts at a node and ends at a node, and has an area to the left of its direction of travel, and has an area to the right of its direction of travel. The direction of travel is arbitrarily determined at the time of data capture. Lines connect to each other at nodes, and a line does not cross itself or any other line. A line may describe the boundary between two areal map features, such as counties, or may define a map feature by itself, such as a road. A special line, called a degenerate line, is used to define features symbolized as independent points on a map. A degenerate line starts and ends at the same node, has two identical coordinate pairs, has zero length, and has the same area to the left and right of the direction of travel; that is, it is totally enclosed inside one map area. An area is a portion of the map bounded by lines. All portions of the map must be assigned some area point. Each area is identified in a DLG-3 data file by a point chosen to represent the characteristics of the area. Newer versions of the processing software, the DLG Production System or PROSYS, locate a given area point inside the area it represents, although this is not a structural requirement. Every DLG data file will have at least two areas identified: one representing the area covered by the file and the other representing the area outside the coverage of the file. Additional areas will be identified as necessary to subdivide the area covered by the file. Polygons as unique features are not defined explicitly in a DLG file. However, polygons can be constructed using line-area linkages built into the DLG data structure. ATTRIBUTE CODES In addition to locational and topological information, DLG data elements may have explicitly encoded attributes. Attribute codes, also called feature codes or classification attributes, are used to describe the map information represented by a node, area, or line. For example, the attribute code for an area might identify a lake or swamp; the attribute code for a line might identify a road, railroad, stream, or shoreline (fig. l). Figure 1.--Map elements showing roads, railroads, buildings, streams, and lake and forest areas. The codes are based on the cartographic features symbolized on the USGS Topographic Map Series. These maps are the basic source material used to digitize and to encode the data elements, and therefore the map symbology has a strong influence on the overall classification strategy. A listing of all the attribute codes currently assigned and used in 1:24,000- and 1:100,000-scale DLG files is given in Appendix D. Detailed information on how to apply and interpret the attribute coding system is given in Standards for Digital Line Graphs, Part 3: Attribute Coding. (This publication may be purchased from the U.S. Geological Survey. See the ordering information inside the front cover.) Each attribute code identifies the major category to which a data element belongs, as well as the specific nature of the element. Codes also may provide additional descriptive information. Most elements are uniquely described by a single attribute code. Others, however, may require two or more codes for a complete description. If multiple attributes are needed to describe an element, the order is not usually significant. Allowing for a variable number of attribute codes creates an open-ended structure to which information may be added at any time. It is not necessary for each element to have associated attributes; in general, attribute codes are not assigned to an element if the attributes can be derived based on relationships to adjacent elements. For example, a U.S. Public Land Survey section line is not assigned an attribute code because the line record carries a reference to the areas to the left and right, that will be assigned attribute codes identifying the two different section numbers. The fact that the line is a section line is derivable. A DLG attribute code is composed of two distinct numeric fields: a three-digit major code, which identifies the major category to which the element belongs, and a four-digit minor code, which specifically describes the element. In the digital file, the major and minor attributes are encoded in two integer fields of six digits, right justified with leading blanks (FORTRAN 2I6 format). In this document, major codes are presented as three digits, and minor codes are presented as four digits. Leading zeros are shown for clarity; for example: 050 0412. Major Attribute Codes A list of the major codes and the categories that are currently being collected is contained in table 1. The first two digits of the major code uniquely identify the category to which the described element belongs. The third digit of the major code is used to modify the minor code in two ways: o If zero, the minor code represents a description or classification of the element. o If non-zero, the minor code which follows is a parameter requiring special interpretation according to instructions given in the codes for each category (see next section). Transportation systems have been assigned more than one major code so that their components may be readily separated for analytical applications. Table 1.--Major codes used for DLG base categories _______________________________________________________________ Major Code Base Category _______________________________________________________________ 020 Hypsography 0501 Hydrography 070 Surface Cover 080 Non-Vegetative Surface Features 090 Boundaries 150 Survey Control and Markers 1702 Transportation--Roads and Trails 1802 Transportation--Railroads 1902 Transportation Systems--Pipelines, Transmission Lines, Miscellaneous Transportation Features 2003 Other Significant Manmade Structures 300 U.S. Public Land Survey System ________________________________________________________________ 1 Prior to 1983, hydrographic features were digitized as two separate categories, (1) 030-Streams and (2) 040-Water bodies. Hydrographic features are currently digitized as a single category, 050-Hydrography. See Appendix H for a list of hydrographic attribute codes used prior to 1983. 2 In the last quarter of 1985, the transition was made to these new transportation attribute codes, adding codes for certain miscellaneous transportation features. See Appendix I for a list of transportation attribute codes used prior to this transition. 3 In the last quarter of 1985, codes for this category were created to replace an earlier version of codes. See Appendix J for a list of the previous attribute codes. Minor Attribute Codes The first digit of the minor code is normally zero. If non-zero, it is used as a modifier to provide additional information such as road access or railroad status. The remaining three digits are normally used to indicate the cartographic interpretation to be applied to specific elements. The type of element described by a particular code usually can be determined from the range of value of the last three digits: 001 - 099 = nodes 100 - 199 = areas 200 - 299 = lines 300 - 399 = degenerate lines 400 - 499 = codes which may be applied to any element type (nodes, lines, areas, or points) 601 - 699 = general descriptive codes The last three digits (and occasionally all four digits) also may be used as a parameter code. Parameters are used when a minor code can legitimately assume a range of values such as a water elevation or a highway route number. The meaning of a parameter code is indicated by the (non-zero) third digit of the major code. Sample Attribute Codes Four examples using the DLG attribute codes follow and should be interpreted with reference to Appendix D. Example A: 050 04l2 The major code 050 indicates the Hydrography category. The minor code 04l2 identifies the feature as a stream. Example B: 170 0201 The major code 170 indicates the Roads and Trails overlay in the Transportation category. The minor code 0201 identifies the feature as a class 1 highway. l70 0603 The major code l70 indicates the Roads and Trails overlay in the Transportation category. The minor code identifies the feature as a road under construction. This code would be used in addition to the code describing the class of road, and would appear in the same record with the code 170 0201. Example C: 055 0033 The major code 055 indicates a river mile mark for the Hydrography category. Because the last digit of the major code is non-zero, the minor code is a parameter. The minor code 0033 indicates that the value of the river mile mark at that point is 33. Example D: 306 0033 The major code 306 indicates an Origin of Survey code for the U.S. Public Land Survey System category. Because the last digit of the major code is non-zero, the minor code 0033 indicates that the area element is referenced to the Willamette Meridian. SAMPLE LINE GRAPH STRUCTURE Examples of a line graph and its corresponding digital records are given in figure 2 and table 2. These examples are simplified representations of the concepts used in the DLG-3 structure; they are not actual data files. The examples shown are composed of 13 nodes, 5 areas, and 15 lines. The 13 nodes are labeled N1 through N13, the 5 areas are labeled A1 through A5, and the 15 lines are labeled L1 through L15. Each element type is maintained as a separate list in the digital data. Figure 2.--Sample line graph. The map represented by the example is divided into five distinct areas labeled Al through A5. Area A1 represents all the area outside of the map border. There is one outside area for each DLG-3. It is always the first area encountered and has the attribute code 000 0000. In the example given in figure 2, the portion of the map inside the border is divided into four areas, each bounded (closed) by lines. Area A2 is bounded by lines L14, L1, L4, and L5. Area A3 is bounded by lines L3, L13, L4, L6, L7, L8, L15, and L9. Area A4 is bounded by lines L8, L15, and L9. Area A5 is bounded by lines L5, L6, L7, and L10 and L2. In this example, line elements contain the only explicit topological references. Each line contains pointers to its bounding nodes (starting and ending) and the areas that it bounds (left and right of the line). Table 2.--Digital description of the topological elements and relationships of a sample line graph (see fig. 2) _______________________________________________________________ Nodes Areas _______________________________________________________________ Internal Internal Id Id Number X Coordinate Y Coordinate Number X Coordinate Y Coordinate N1 1 28 A1 0 0 N2 13 14 A2 6 24 N3 23 28 A3 3 10 N4 13 1 A4 8 7 N5 13 7 A5 18 14 N6 22 10 N7 6 5 N8 10 4 N9 11 24 N10 23 1 N11 1 17 N12 1 1 N13 9 9 _______________________________________________________________ Lines _______________________________________________________________ Nodes Area Coordinates Number Starting Ending Left Right (first x y last x y) L1 1 3 1 2 1, 28 23, 28 L2 3 10 1 5 23, 28 23, 1 L3 4 12 1 3 13, 1 1, 1 L4 11 2 2 3 1, 17 .... 13, 14 L5 2 3 2 5 13, 14 23, 28 L6 2 5 5 3 13, 14 13, 7 L7 5 4 5 3 13, 7 13, 1 L8 13 7 4 3 9, 9 .... 6, 5 L9 7 8 4 3 6, 5 .... 10, 4 L10 4 10 5 1 13, 1 23, 1 L11 5 6 5 5 13, 7 .... 22, 10 L12 9 9 2 2 11, 24 11, 24 L13 12 11 1 3 1, 1 1, 17 L14 11 1 1 2 1, 17 1, 28 L15 8 13 4 3 10, 4 .... 9, 9 _______________________________________________________________ This format is simi1ar in concept to the standard DLG-3 data structure, which minimizes redundant linkages to achieve efficient data encoding and storage. The lines in figure 2 are labeled L1 through L15. The lines can be identified by their starting node number, ending node number, number of the area to the left of the direction of travel, number of the area to the right of the direction of travel, and string of coordinates describing the alignment of the line. In this example, only two pairs of coordinates are shown; however, in an actual file, an irregular line would have a variable number of coordinate pairs up to a limit of 3,000 coordinate pairs. The direction of travel of the line is arbitrarily determined during the digitizing operation. In this example, L1 is encoded as proceeding clockwise around area A2. Thus line L1 starts at node N1, ends at node N3, has area A1 to the left of the direction of travel, and has area A2 to the right of the direction of travel. The coordinate string describing the alignment of the line will start with the same coordinate values as that of node N1 and will end with the same coordinate values as that of node N3. Because the area to the left of its direction of travel, A1, is different from the area to the right of its direction of travel, A2, the line is known to be a boundary between the two areas. Lines L11 and L12 are examples of lines that lie within one area. In this example, line L11 starts at node N5, ends at node N6, has area A5 to the left of the direction of travel, and again has area A5 to the right of the direction of travel. The coordinate string for the line will start with the same coordinate values as that of node N5 and will end with the same coordinate value as that of node N6. Line L12 is an example of a degenerate line. The line starts at node N9, ends at node N9, and has area A2 as both the area to its left and right. There are two coordinate pairs in the string defining the line, and both points have the same coordinate values as node N9; thus, the two points are the same and the line has zero length. The line graph concept allows all of the points on the map to be described as a member of a line graph element (node, area, or line) with minimal redundancy. The relationships between the various elements are indicated by the structure. Note that in this example the x and y coordinates are numbered from the lower left corner to simplify the drawing. In an actual DLG-3 file, the origin is the center of the map and the internal file coordinates are numbered plus or minus 1 to 32,767 in thousandths of inches. See the section labeled "coordinate systems" for more detail. GRAPH THEORY IN DLG DATA The digital line graph concept is based on graph theory, in which a diagram can be expressed as a set of elements (nodes, areas, and lines) in a manner that shows logical spatial relationships with minimal redundancy. There are three ways to implement the line graph concept in DLG files: the area case, the network case, and the area-hybrid case. All NMD files are collected and processed as area-hybrid case DLG's. Area Case Area line graphs can be used to represent area features such as political entities or the U.S. Public Land Survey System. In the area case, all closed circuits of lines form unique areas. All line elements bound two different area elements. Line elements for area line graphs are not normally assigned primary attributes. The characteristics of lines in these categories can usually be derived by examining the attributes of the area elements on each side of the line. Network Case Network line graphs can be used to represent linear features such as roads, single-line streams, or railroads. The network case differs from the area case in that, irrespective of the number of closed areas forming the graph, only two area elements are encoded: (l) the area outside the graph, termed the outside area; and (2) the area within the graph, termed the background area. All lines except the graph boundary are considered to be contained within the background area. The major topological relationship expressed by network data is that of connectivity. Data encoded in network line graph form are suitable for various forms of network analysis, such as minimum path computations. Area-Hybrid case In the area-hybrid case, network and area type information is gathered in a single DLG file. In this approach, all closed circuits of lines define unique areas. However, some lines may exist which do not form boundaries between two areas. The unique areas which represent features for the overlay are given attribute codes. For example, in the hydrography category there are areal features, such as lakes, reservoirs, and swamps, that are represented by unique, attributed area elements. There are also linear features, such as single-line streams and aqueducts, that are significant in themselves and are also assigned attribute codes. These features may occupy a position in an area of no other hydrographic significance, that is, an unattributed background area. Therefore, in processing area-hybrid data, the background area itself is broken into numerous unattributed area records that distinguish the background areas from hydrographic areas. To further illustrate the area-hybrid case, a detailed description of a representative line graph follows. Figure 3 shows a window taken from the Oneco, Connecticut-Rhode Island, 1:24,000-scale USGS quadrangle map. Figure 4 shows the line graph encoded for the hydrography of the same area. Certain nodes, areas, and lines are labeled. Table 3 contains some of the digital data records, extracted from the standard format DLG file, which describe this portion of the graph. The internal sequence identification numbers shown reflect the order of these features in the original file. (Note: Descriptions of DLG-3 formats are contained in Appendixes A and B, and a list of attribute codes is contained in Appendix D.) In the Oneco example, each node and area element is described by one or two logical records: (1) a type D.l record that describes the element, and (2) an optional type F record that lists the attribute codes associated with the element. The first record (type D.1) for each node and area element contains the following fields: 1. Type of record indicator, N for node or A for area. 2. Internal sequence identification number. 3. X coordinate of node or representative area point. 4. Y coordinate of node or representative area point. 5. Number of attribute codes that describe the element. 6. Number of pairs of characters in the text string that describes the element. Figure 3.--Window from the Oneco, Connecticut-Rhode Island, 1:24,000-scale quadrangle map. The second record (type F) for each node and area element contains n attribute codes (expressed as major and minor code pairs), where n is the number specified in field 5 of the first (type D.l) record. Each line element in the Oneco example is described by two or three logical records: (1) a type D.2 line description record, and (2) a type E record that lists the x,y coordinate pairs that define the shape of the line, and, if appropriate, (3) a type F (attribute code) record. The first record (type D.2) for each line element contains the following fields: 1. Type of record indicator (L). 2. Internal sequence identification number. 3. Internal sequence number of starting node. 4. Internal sequence number of ending node. 5. Internal sequence number of the area to the left of the line. 6. Internal sequence number of the area to the right of the line. 7. Number of x,y coordinate pairs that locate the line on the map. 8. Number of attribute codes that describe the line. 9. Number of pairs of characters in the text string that describes the line. Figure 4.--Window from line graph of hydrography, Oneco, Connecticut Rhode Island, quadrangle. The second logical record (type E) for each line element contains n coordinate pairs, where n is the number specified in field 7 of the first (type D.2) record. The type F record is as described above. The records listed in table 3 describe several hydrographic features in the center of the north edge of figure 3, including a portion of Quanduck Brook, a small pond, a swamp, and two small streams. The records referred to in the following description have been extracted from a complete DLG. Therefore, the internal sequence identification numbers shown reflect the order of these features in the original file. The records are referred to in this description by these internal sequence numbers; for example, node 141, area 13, line 119. Background area 13 has an x,y coordinate of 0,0. This is a result of the processing software automatically determining the numerous background areas within a DLG and assigning these areas an x,y coordinate of 0,0 (which is the origin of a DLG, usually located at the center of a quad). The area outside of the map is represented by area record 1 and is identified by the attribute code 000 0000. Table 3.--Selected sample of standard format DLG-3 records for Oneco, Connecticut-Rhode Island, Hydrography _______________________________________________________________ HYDROGRAPHY 2360 808 1180 368 1572 1021 N 141 1654 8143 0 0 N 142 949 7238 0 0 N 150 1501 8058 0 0 N 151 794 7190 0 0 N 364 1484 9210 1 0 50 1 N 387 -1571 10532 1 0 50 1 N 511 893 7972 0 0 A 1 -9137 146 1 0 0 0 A 13 0 0 0 0 A 50 -3179 6522 1 0 50 412 A 169 -1557 10407 2 0 50 111 50 613 A 221 893 7991 2 0 50 421 50 0 L 119 141 140 13 50 26 1 0 1654 8143 1681 8142 1695 8134 1709 8106 1721 8071 1727 8023 1758 7963 1765 7956 1785 7958 1856 8012 1954 8106 2008 8162 2057 8191 2082 8198 2113 8220 2309 8328 2342 8332 2362 8327 2411 8287 2424 8279 2448 8283 2507 8310 2565 8348 2590 8362 2638 8391 2655 8406 50 605 L 120 142 141 13 50 22 1 0 949 7238 952 7275 926 7357 9297 394 941 7427 972 7490 1004 7542 1095 7665 1121 7691 1176 7754 1277 7852 1306 7883 1324 7921 1372 7980 1382 7988 1407 8027 1462 8072 1526 8083 1558 8100 1620 8137 1641 8144 1654 8143 50 605 Table 3.--Selected sample of standard format DLG-3 records for Oneco, Connecticut-Rhode Island, Hydrography--continued L 121 143 142 13 50 33 1 0 219 6694 211 6712 211 6745 200 6785 206 6809 223 6821 264 6825 288 6844 292 6871 285 6907 276 6928 274 6959 284 6978 300 6990 319 6992 349 6991 363 7001 431 7099 442 7112 536 7275 563 7290 609 7303 665 7307 717 7296 731 7281 739 7262 784 7230 816 7195 844 7182 877 7183 909 7200 937 7225 949 7238 50 605 L 129 150 139 50 13 33 1 0 1501 8058 1572 8070 1601 8086 1626 8105 1651 8114 1671 8109 1685 8081 1707 8020 1718 8001 1731 7950 1743 7938 1765 7927 1788 7928 1820 7948 1844 7966 1954 8074 2011 8123 2034 9151 2085 8179 2104 8192 2114 8195 2180 8239 2253 8280 2298 8304 2321 8313 2345 8312 2359 8305 2400 8269 2424 8263 2452 8266 2476 8277 2500 8286 2512 8294 50 606 L 130 151 150 50 13 25 1 0 794 7190 834 7159 854 7157 903 7169 927 7181 953 7205 973 7239 975 7259 955 7337 947 7351 952 7390 981 7461 1008 7492 1065 7577 1107 7645 1143 7679 1162 7697 1193 7741 1288 7831 1338 7890 1348 7909 1413 7996 1453 8038 1491 8057 1501 8058 50 606 L 131 152 151 50 13 36 1 0 59 6583 109 6597 205 6612 225 6621 239 6637 245 6657 237 6715 237 6748 222 6775 226 6791 237 6802 278 6809 315 6835 325 6859 319 6885 313 6900 311 6914 297 6939 302 6959 313 6967 360 6970 375 6975 394 7004 413 7037 423 7042 453 7082 510 7183 542 7252 568 7275 638 7291 670 7295 709 7283 734 7245 767 7213 786 7201 794 7190 50 606 L 339 364 141 13 13 21 1 0 1484 9210 1490 9148 1531 8966 1550 8852 1560 8820 1566 8780 1594 8677 1599 8629 1626 8580 1636 8559 1648 8540 1661 8529 1673 8510 1675 8450 1698 8376 1701 8350 1690 8318 1643 8261 1641 8219 1653 8159 1654 8143 50 412 L 358 387 21 13 13 23 1 0 -1571 10532 -1578 10608 -1597 10705 -164110804-165710832-168311865 -1689 10877 -1730 10922 -1769 10946 -184110979-194511041-197911049 -2019 11074 -2061 11110 -2080 11131 -209311172-210111212-210911230 -2131 11263 -2135 11273 -2143 11280 -218511369-220111395 50 412 Table 3.--Selected sample of standard format DLG-3 records for Oneco, Connecticut-Rhode Island, Hydrography--continued L 501 511 511 221 13 7 2 0 893 7972 915 7976 912 7997 890 8020 871 7996 864 7974 893 7972 50 0 50 200 L 895 387 387 169 13 20 1 0 -1571 10532 -1586 10532 -1619 10513 -162210504-162210454-163810426 -1655 10415 -1671 10409 -1698 10404 -170710392-169710373-166710365 -1562 10348 -1542 10354 -1526 10373 -152310412-153010462-154310503 -1563 10527 -1571 10532 50 204 _______________________________________________________________ The double-line stream, Quanduck Brook, is represented by area record 50 and identified by the attribute code 050 0412 (stream). Area record 13 is the background area on either side of the stream, and as such has no attribute code assigned. Line records 129, 130, and 131 form the left bank of the river, coded as though one were facing downstream. These lines are identified by the attribute code 050 0606 (left bank) and can be chained by referring to the common nodes. Line record 131 begins outside figure 4 and ends at node 151. Line record 130 starts at node 151 and ends at node 150. Line record 129 starts at node 150 and ends outside figure 4. The right bank of the river is formed in a similar fashion by line records 119, 120, and 121, which are identified by the attribute code 050 0605 (right bank). They are similarly linked through the nodes 141 and 142. Note that the identity of the shoreline as either left or right bank (coded as such to indicate downstream flow) is established by the attribute code, so the given line segments making up the shoreline may be digitized in either direction without altering its identity. Area record 221 describes the small pond just north of Quanduck Brook. It is identified by two attribute codes: 050 0421 (lake or pond) and 050 0000 (photorevised feature). Its shoreline is formed by line record 501 and identified by the attribute codes 050 0200 (shoreline) and 050 0000 (photorevised feature). This line can be identified as bounding area 221 by the reference within the line record to area 221 being located to the left of the line (indicating that line 501 was digitized counterclockwise). Area record 169 describes the marsh in the upper-left corner of figure 4. It is identified by two attribute codes: 050 0111 (marsh, wetland, swamp, bog) and 050 0613 (wooded). The perimeter of the swamp is formed by line record 895 and identified by the attribute code 050 0204 (apparent limit). This line can be identified as bounding area 169 by the reference within the line record to area 169 being located to the left of the line (indicating that line 895 was digitized counter-clockwise). The single-line stream flowing into Quanduck Brook is represented by line record 339 and identified by attribute code 050 0412 (stream). Note that this stream has the same attribute code as the Quanduck Brook (050 0412). This is because both are streams, one of which is digitized as a line and one of which is digitized as an area and its delimiting banks. Line 339 extends from node 364 to node 141. The direction of flow of this stream can be derived from the fact that node 364 is identified with attribute code 050 0001 (upper origin of stream). Background area 13 is located on both sides of the stream. DISTRIBUTION FORMATS The 1:24,000-scale and other large-scale DLG data are available in two distribution formats: (1) standard and (2) optional. The standard distribution format is intended to minimize storage requirements. Explicit topological linkages are contained only in the line elements (starting node, ending node, area to the left of direction of travel, area to the right of direction of travel). A sample DLG in standard format is found in Appendix F. The optional distribution format was designed to facilitate data usage. The topological relationships explicitly encoded include starting node, ending node, area to the left of direction of travel and area to the right of direction of travel for line elements, bounding lines for area elements, and bounding lines for node elements. These files are typically larger than those in the standard format but, for certain applications, can simplify processing requirements. For example, topological linkages are explicitly encoded for all line, node, and area elements, allowing a polygon data structure to be easily created. These linkages facilitate GIS applications of DLG data as well as generation of graphic products. A sample DLG in optional format is found in Appendix G. The characteristics of the standard and optional DLG formats are summarized in table 4. Table 4.--Standard and optional DLG format _______________________________________________________________ Standard Optional _______________________________________________________________ Character set 8-bit ASCII 8-bit ASCII Logical record 144 bytes 80 bytes length Physical record Variable in Variable in length (blocksize) multiples of multiples of 144 bytes. 80 bytes. Coordinate system Internal file Ground (thousandths of planimetric a map inch). (UTM). Topological Contained only Contained in linkages in line elements. node, area, and line elements. _______________________________________________________________ These formats are described in detail in Appendixes A and B. SOURCE MATERIALS The DLG data files described in this document are derived from USGS topographic maps published as 7.5-minute quadrangles at 1:24,000- or 1:25,000-scale. Where 7.5-minute coverage is not available, the following sources are used, in order of preference: 1. Advance manuscripts for 7.5-minute maps, 2. Published 1:62,500 scale 15-minute quadrangle maps (1:63,360 scale in Alaska), or 3. Archival compilation materials for 15-minute quadrangle maps, if available at a larger scale than the published map, such as 1:48,000 scale. The scale of the source materials used to generate a DLG is contained in the file header. The scale is also reflected in the resolution field, which states the ground length in meters of the smallest data collection unit (0.001 inch) for each scale. Source scale Resolution 1:24,000 0.61 meter 1:25,000 0.635 meter 1:48,000 1.22 meters 1:62,500 1.587 meters 1:63,360 1.61 meters CELL SIZE AND FILE EXTENT In general, the DLG's are stored and distributed in standard cells of 7.5 minutes of latitude by 7.5 minutes of longitude. The majority of 1:24,000-scale data collected from l5-minute quadrangles are digitized as four 7.5-minute units. A few older data files collected from 15-minute quadrangles were not digitized in 7.5-minute units, but in 15-minute units. Nonstandard cells are collected in coastal areas where map format is sometimes extended to conform to the shoreline. It is anticipated that these nonstandard files will eventually be partitioned into standard 7.5-minute by 7.5-minute files. COORDINATE SYSTEMS The positional descriptions for DLG data elements are expressed in one of two coordinate systems, dependent upon the distribution format selected. These are described as follows as the standard distribution format and the optional distribution format. Standard Distribution Format The DLG data in the standard distribution format are encoded using an internal file coordinate system to minimize storage requirements. The characteristics of this system are as follows: 1. The coordinate system is Cartesian. 2. The origin (x=0, y=0) is normally at the center of the cell. Some older files will have their origin below and to the left of the lower left corner of the cell (see fig. 5). 3. The x-axis of the coordinate system is parallel to a theoretical straight line connecting the southwest and southeast corners of the cell; y-axis is perpendicular to that line. 4. One unit is equal to 0.00l-inch at map scale. 5. The coordinate domain is limited to the range -32768 to +32767. Figure 5.--Location of origin of file reference coordinates. The file header contains the parameters of a transformation which can be used to convert the internal file coordinates to the ground coordinate system, which is the Universal Transverse Mercator (UTM) for 1:24,000-scale DLG's. An example of this transformation is given in Appendix E. Optional Distribution Format The DLG data in the optional distribution format are expressed in the units of the ground coordinate system; that is, meters in the UTM coordinate system. DATA VALIDATION The DLG data do not currently carry quantified accuracy statements. The following procedures, however, are used to validate the data files before they are released for distribution: 1. File fidelity and completeness -- The data are either manually digitized using equipment with a resolution of 0.00l inch and an absolute accuracy of from 0.003 to 0.005 inch, or are scanned on an automatic device with a resolution of 30 points per millimeter, or 0.0013 inch. The positional accuracy of the data and completeness of the file are checked by visually comparing proof plots with the original stable-base source material. These proof plots are generated using automated drafting machines with a resolution of 0.00l inch and an absolute accuracy of from 0.003 to 0.005 inch. 2. Attribute accuracy -- DLG attribute codes are checked by software against a table of valid codes to ensure that each attribute in a file is valid for the category and element type to which it is assigned. Validating the codes for correct application is currently a manual process involving the correlation of formatted listings with proof plots. 3. Topological fidelity -- The topological structure of each DLG file is fully validated by software. There are no extraneous intersections; that is, a line does not join or cross another line, or itself, except at a node. No line extends through a node. Polygon (area) adjacency is also validated; that is, area left and right topological attributes of lines are consistent throughout the file. The neatline is free of gaps. Validation of DLG data is performed for each category within a file. Additional data validation is being implemented as follows: 1. Edge matching -- Validation software provides for checking the edges of each quadrangle against the edges of the four adjacent quadrangles. Each edge of a DLG-3 is checked for positional and attribute matching along the neatlines of the adjoining DLG-3 cells, provided that the surrounding data cells are available at the time the DLG-3 is entered into the NDCDB. There is currently no attempt, other than the coding of coincident features, to provide fully integrated data categories. 2. Quality Control Flags -- Information in the header of the DLG-3 file indicates the status of the file with respect to the edge matching described above. Twelve bytes at the end of record A.1 in the standard distribution format and at the end of record 3 in the optional distribution format of the ASCII file is set aside for quality control flags (see Appendixes A and B). The first three of these flag positions are for future use. The fourth flag position contains a value encoded in the bit pattern that is used only by the database manager to check the edge status. The remaining either flags indicate to the user the edge status code and the status reason code. The four status flags contain the status of the West, North, East, and South edges of a DLG-3 as compared to the edges of the four adjoining DLG-3 files. Each of the four flags is followed by a status reason code that explains the status of the four edges respectively. The possible status values for a DLG-3 entered into the NDCDB are: o "b" - unchecked ("b" = blank) o "0" - passed edge match test o "1" - alignment discontinuity o "2" - attribute discontinuity o "3" - attribute and alignment discontinuity The possible reason codes are: o "b" - no reason code set ("b" = blank) o "4" - data do not exist o "5" - adjacent data cell not currently available for test o "6" - discontinuity due to temporal differences in source materials o "7" - attribute mismatch valid o "8" - paneling unauthorized A value of "4" indicates that the data cannot be matched because there are no adjacent data. This situation occurs where the quadrangle is on the coast and no adjoining map exists. A reason code with the value of "5" may be reset as the adjoining data cell becomes available for edge match verification. A reason code with the value of "6" means that the adjoining quadrangles were mapped at different times and there are features that do not match in alignment or classification due to the time elapsed between the compilation of the two sets of source materials. A value of "7" indicates that the discrepancy in attribute codes between the two files has been checked and is valid. A reason code with the value of "8" indicates that there was no authorization in place for edge matching at the time the data were archived. When an edge status code is other than "0", the DLG-3 file will be entered into the NDCDB only when the reason code has also been set as a result of examination of the file. The following combinations of status flags and reason flags are currently valid for the processing software. blank, blank blank, 4 blank, 5 blank, 8 0,blank 1,6 1,7 2,6 2,7 3,6 3,7 APPENDIXES APPENDIX A.--Standard DLG Distribution Format (Record Contents) In the standard DLG distribution format, the topological linkages are contained only in the line elements. The files are physically comprised of standard 8-bit ASCII characters organized into fixed-length logical records of l44 characters. Nine distinct record types are defined. Logical record type Content A Header record containing DLG identification information. B Header record containing projection information and registration points. C Header record identifying data categories contained in this DLG and indicating the number of nodes, areas, and lines in each category. D.l A node or an area record. D.2 A line record. E Record containing x,y coordinate string. F Record containing attribute codes. G Record containing text string (not currently used). H Accuracy estimate (not currently used). The actual sequence of records in a standard distribution DLG file is as follows: l. Header records Type A (one record) Type B (one record) Type C (one record) 2. Data records Node records Repeated Node description (D.l) for each Attribute codes (F) node within a Text string (G) data category Area records Area description (D.l) Repeated Repeated Attribute codes (F) for each for each Text string (G) area within a data category data category Line records Line description (D.2) Repeated x,y coordinates (E) for each Attribute codes (F) line within a Text string (G) data category 3. Accuracy estimate Type H (one record) (not currently used) Descriptions of the contents of records A-F are contained in the following tables. The tables also reflect the relationship between these record types and l44-byte logical records. APPENDIX A.--Standard DLG Distribution Format (Record Contents)--continued [Integer fields with a value of zero have leading zeros suppressed. Any field with the format of D24.l5 which has a value of zero will be represented as "bbb0.0bbbbbbbbbbbbbbbbbb", the last four positions of the fractional portion being reserved for a decimal exponent. (b=blank)] Logical Record Type A Record Data Type Starting Ending Number Element Contents (Fortran Notation) Format Byte Byte Comment A.l 1 Name of digital ALPHA A40 l 40 When practical, the name of cartographic unit the source map followed by the State two-character designator(s). --- --- Filler --- --- 4l 4l l space A.l 2 Date of original ALPHA Al0 42 5l Year of original source source materials material, followed by latest revision date if applicable. For example, 1956, 1965. A.1 3 Date qualifier ALPHA A1 52 52 Qualifier to discriminate revision date, if present. (P=photorevision, I=photo- inspected, L=limited revision) A.1 4 Scale of original INTEGER*4 I8 53 60 Scale denominator of source source material material; for example, 24000. --- --- Filler --- 6l 63 3 spaces A.1 5 Arbitrary quad ALPHA A3 64 66 Quad number assigned for USGS number internal use. Filler --- --- 67 113 47 spaces APPENDIX A.--Standard DLG Distribution Format (Record Contents)--continued Logical Record Type A Record Data Type Starting Ending Number Element Contents (Fortran Notation) Format Byte Byte Comment A.1 6 Largest primary ALPHA A4 114 117 Largest primary contour contour interval interval, followed by the interval unit (1=feet, 2=meters). Present only if two or more primary contour intervals exist. (Selected overlays.) A.1 7 Comma ALPHA A1 118 118 Comma separator A.1 8 Largest primary ALPHA A4 119 122 Largest primary bathy- bathymetric contour metric interval, followed interval by the interval unit (1=feet 2=meters). Present only if two or more primary contour intervals exist. --- --- Filler 1 space A.1 9 Smallest primary ALPHA A4 124 127 Smallest or only primary contour interval contour interval, followed by the interval unit (1=feet, 2=meters). (Selected overlays.) A.1 10 Comma ALPHA A1 128 128 Comma separator A.1 11 Smallest primary ALPHA A4 129 132 Smallest or only primary bathymetric contour bathymetric interval, interval followed by the interval unit (1=feet, 2=meters). A.1 12-14 Coded Flags ALPHA A1 133 135 3 flags for future use APPENDIX A.--Standard DLG Distribution Format (Record Contents)--continued Logical Record Type A--continued Record Data Type Starting Ending Number Element Contents (Fortran Notation) Format Byte Byte Comment A.1 15 Coded Flag ALPHA A1 136 136 Database coded edge flag A.1 16 EDGEWS ALPHA A1 137 137 Status flag for west edge, values are: b = unchecked 0 = passed, 1 = alignment discontinuity, 2 = attribute discontinuity, 3 = attribute and alignment discontinuity. A.1 17 EDGEWR ALPHA A1 138 138 Reason for EDGEWS, values are: b = unchecked, 4 = adjacent data do not exist 5 = adjacent data unavail- able, 6 = temporal discontinuity, 7 = attribute mismatch valid, 8 = paneling unauthorized. A.1 18 EDGENS ALPHA A1 139 139 Status flag for north edge, values = b,0,1,2, or 3 as above. A.1 19 EDGENR ALPHA A1 140 140 Reason for EDGENS, values are b,4,5,6,7, or 8 as above. A.1 20 EDGEES ALPHA A1 141 141 Status flag for east edge. Values are b,0,1,2, or 3 as above. A.1 21 EDGEER ALPHA A1 142 142 Reason for EDGEES. Values are b,4,5,6,7, or 8 as above. A.1 22 EDGESS ALPHA A1 143 143 Status flag for south edge. Values are b,0,1,2, or 3 as above. A.1 23 EDGESR ALPHA A1 144 144 Reason for EDGESS. Values are b,4,5,6,7, or 8 as above. APPENDIX A.--Standard DLG Distribution Format (Record Contents)--continued Logical Record Type A--continued Record Data Type Starting Ending Number Element Contents (Fortran Notation) Format Byte Byte Comment A.2 1 DLG level code INTEGER*2 I6 l 6 Code=3, DLG-3 A.2 2 Code defining INTEGER*2 I6 7 l2 Code=l, Universal Transverse ground planimetric Mercator (UTM) reference system A.2 3 Code defining zone INTEGER*2 I6 l3 l8 Codes for UTM coordinate in ground plan- zones are given in imetric reference Appendix C. system A.2 4 Map projection REAL*8 5D24.l5 l9 l38 This field contains the parameters first 5 of l5 map projection parameters. Parameters for the UTM projection are given in Appendix C. --- --- Filler --- --- l39 l44 6 spaces A.3 1 Map projection REAL*8 6D24.l5 l l44 This record contains parameters projection parameters 6 thru ll. Parameters for the UTM projection are given in Appendix C. A.4 1 Map projection REAL*8 4D24.l5 l 96 This field contains the parameters last 4 projection parameters. Parameters for the UTM projection are given in Appendix C. A.4 2 Code defining units of INTEGER*2 I6 97 l02 Code=2, meters measure for ground planimetric coordinates throughout the file APPENDIX A.--Standard DLG Distribution Format (Record Contents)--continued Logical Record Type A--continued Record Data Type Starting Ending Number Element Contents (Fortran Notation) Format Byte Byte Comment A.4 3 Resolution REAL*8 D24.l5 l03 l26 The true ground distance corresponding to one unit (0.001 inch at map scale) in the file internal reference system. Scale Resolution 1:24,000 0.61 M 1:25,000 0.635 M 1:48,000 1.22 M 1:62,500 1.587 M A.4 4 Accuracy code of INTEGER*2 I6 l27 l32 Code=0, unknown accuracy planimetric data A.4 5 Number (n) of sides INTEGER*2 I6 l33 l38 n=4 in the polygon which defines the coverage of the cell --- --- Filler --- --- 139 l44 6 spaces A.5 1 A (4,2) array contain- REAL*8 3(2D24.l5) 1 l44 The four registration points A.6 ing geographic 2D24.l5 l 48 will usually coincide with an coordinates which area defined by one of the constitute the regis- standard map formats of the tration points for the National Mapping Program. DLG. In quadrangle- Coordinates are in geographic based mapping, these longitude and latitude in points form a geographic units of degrees and decimal rectangle/square which degrees and are expressed in contains the domain of the DLG. the order=SW, NW, NE, SE. --- --- Filler --- --- 49 l44 96 spaces APPENDIX A.--Standard DLG Distribution Format (Record Contents)--continued Logical Record Type B Record Data Type Starting Ending Number Element Contents (Fortran Notation) Format Byte Byte Comment B.l 1 Parameters (Al, A2, REAL*8 4D24.l5 1 96 X,Y coordinates resulting A3, A4) of file- from this transformation to-ground projection will be in ground meters in transformation; the UTM zone defined by data explicit form of the element 3 of record A.2. transformation is: X=Alx+A2y+A3 Y=Aly-A2x+A4 where: x,y are coordinates in file internal reference system X,Y are coor- dinates in map projec- tion reference system B.l 2 Number (m) of regis- INTEGER*2 I6 97 l02 m=4 tration points --- --- Filler --- --- l03 l44 42 spaces B.2 1 A (4,3) array con- ALPHA/ 4(A2, 2I6) l 56 The corners of a four-sided taining identifications INTEGER*2 polygon are used as and coordinates of registration points. The registration points. identification sequence is Coordinates are SW, NW, NE, SE. The array expressed in the file is stored by row. internal reference Coordinates in the file system. internal reference system are expressed in units of thousandths of an inch and fall in the range -32768 to +32767. These coordinates correspond to the geographic coordinates contained in records A.5 and A.6. --- --- Filler --- --- 57 l44 88 spaces APPENDIX A.--Standard DLG Distribution Format (Record Contents)--continued Logical Record Type C Record Data Type Starting Ending Number Element Contents (Fortran Notation) Format Byte Byte Comment C.l 1 Number (q) of INTEGER*4 I6 1 6 The value of q may be from 1 categories to 32. Up to 32 categories in the DLG file can be represented in a given file. The value will be 1. --- --- Filler --- --- 7 l44 l38 spaces C.21 1 A (q,7) array contain- ALPHA/ q (A20,6I6) 1 56 This array is stored by to C.N ing category names as INTEGER*2 (57 112) row. The first element is well as maximum and the category name consisting actual number of node, of 20 alphanumeric characters area, and line elements the first four of which are in each category unique. Columns 2 and 3 of the array contain maximum and actual number of nodes in the category. Columns 4 and 5 contain maximum and actual number of areas in the category. Columns 6 and 7 are the maximum and actual number of line segments. (Note: the maximum number of nodes or areas within a category is 25, 960. The maximum number of lines is 25,938. This field is used only during initial processing of data). --- --- Filler --- --- --- 144 32 or 88 spaces 1The number of categories "q" is given in record C.1. There will be 56 bytes of data per category, and thus a maximum of two categories can be described on a 144-character record. The space filler will vary in size depending on the value of "q." APPENDIX A.--Standard DLG Distribution Format (Record Contents)--continued Logical Record Type D Record Data Type Starting Ending Number Element Contents (Fortran Notation) Format Byte Byte Comment D.l 1 Type of element ALPHA A2 1 2 Code ='Nb' for Node element, code 'Ab' for Area element. D.l 2 Element's internal INTEGER*2 I6 3 8 Number is positive and se identification number quential from 1-n within each category and element type. D.l 3 x,y file coordinate INTEGER*2 2I6 9 20 The representative area of node point or repre- point is usually, but not sentative point for the always, contained within the area element area it represents. D.l 4 Number (t) of attri- INTEGER*2 I6 2l 26 Absence of attribute codes bute codes which are is indicated by t=0. attached to the node or area element (t>0) D.l 5 Number (k) of pairs of INTEGER*2 I6 27 32 k=0. Not currently used. text characters which are attached to the node or area element (k>0) --- --- Filler --- --- 33 l44 ll2 spaces D.2 1 Code indicating a ALPHA A2 l 2 Code='Lb' for line segment. line segment graph element D.2 2 Line segment's internal INTEGER*2 I6 3 8 Number is positive and identification number sequential from 1-n within each category and element type. D.2 3 Internal identification INTEGER*2 I6 9 l4 Number refers to data number of starting node element 2 in record D.l. APPENDIX A.--Standard DLG Distribution Format (Record Contents)--continued Logical Record Type D--continued Record Data Type Starting Ending Number Element Contents (Fortran Notation) Format Byte Byte Comment D.2 4 Internal identification INTEGER*2 I6 l5 20 Number refers to data number of ending node element 2 in record D.l. D.2 5 Internal identification INTEGER*2 I6 21 26 Number refers to data number of left area element 2 in record D.l. D.2 6 Internal identification INTEGER*2 I6 27 32 Number refers to data number of right area element 2 in record D.l. D.2 7 Number (v) of coordinate INTEGER*2 I6 33 38 The value of v is from pairs which define the 2 to 3000. line segment D.2 8 Number (t) of attribute INTEGER*2 I6 39 44 Absence of classification codes which are attached attribute codes is indicated to the line segment (t>0) by t=0. D.2 9 Number (k) of pairs of INTEGER*2 I6 45 50 k=0. Not currently used. text characters which are attached to the line segment (k>0) --- Filler --- --- 5l 144 94 spaces E.l to2 1 A (v,2) array contain- INTEGER*2 v(2I6) 1 Coordinates are expressed E.n ing an ordered sequence in internal file reference of coordinate pairs which system, in units of define the image presen- thousandths of an inch. tation of a line element The array is stored by row. --- --- Filler --- --- --- 144 0 to l32 spaces 2The number of coordinate pairs, "v", is given in record D.2. There will be v(2I6) coordinate pairs of which a maximum of l2 pairs will fit on a l44-character ASCII record. The space filler will vary in size depending on the value of "v." If "v" is an integer multiple of l2, there will be no spaces as filler at the end of the record. APPENDIX A.--Standard DLG Distribution Format (Record Contents)--continued Logical Record Type F Record Data Type Starting Ending Number Element Contents (Fortran Notation) Format Byte Byte Comment F.l3 1 A (t,2) array containing INTEGER* 2 t(2I6) 1 The array is stored by row to F.n major and minor attribute with the first column con- codes for a graph element taining the major attribute code and the second column containing the minor attri- bute code. --- --- Filler --- --- --- 144 0 to l32 spaces 3The number of feature (attribute) codes, "t" is given in the D.l and D.2 records. The F record is an array of t(2I6) codes of which a maximum of l2(2I6) will fit on a l44 character ASCII record. The space filler will vary depending on the value of "t". If "t" is an integer multiple of l2 there will be no spaces as filler at the end of the record. APPENDIX B.--Optional DLG Distribution Format (Record Contents) In the optional DLG distribution format, topological linkages are explicitly encoded for node and area elements as well as for line elements. The files are physically comprised of 8-bit ASCII characters organized into fixed-length logical records of 80 characters (bytes). Bytes 1-72 of each record may contain DLG data, and bytes 73-80 may contain a record sequence number. The 11 distinct record types used in the optional DLG distribution format may be categorized as header and data records. Four types of records are considered header records: o File identification and description records o Accuracy records (not currently used) o Control-point identification records o Data-category identification records Seven types of records are considered data records: o Node and area identification records o Node-to-line linkage records o Area-to-line linkage records o Line identification records (also contains line-to-node and line-to-area linkages) o Coordinate string records o Attribute code records o Text records (not currently used) The actual sequence of records in an optional distribution format DLG file is as follows: l. Header records Ten file identification and description records Accuracy records (not currently used) Control point identification records (one per control-point) Data category identification records (one per data category in the file) 2. Data records Node identification record Repeated Node-to-line linkage record(s) for each Attribute code record(s) node within a Text record(s) data category Area identification record Repeated Repeated Area-to-line linkage record(s) for each for each Attribute code record(s) area within a data Text record(s) data category catagory Line identification records Repeated Coordinate string record(s) for each Attribute code record(s) line within a Text record(s) data category Descriptions of the contents of the various types of records in an optional distribution format DLG are contained in the following tables. APPENDIX B.--Optional DLG Distribution Format (Record Contents)--continued FILE IDENTIFICATION AND DESCRIPTION RECORDS Record Data Type Starting Ending Number Element Contents (Fortran Notation) Format Byte Byte* Comment 1 1 Banner ALPHA A72 1 72 Descriptive text. 2 1 Name of digital ALPHA A40 1 40 When practical, the name of cartographic unit the source map followed by the State two-character designators. --- --- Filler --- --- 41 41 l space 2 2 Date of original ALPHA Al0 42 51 Year of original source source material material followed by latest revision date if applicable; for example, l956, l965. 2 3 Date qualifier ALPHA A1 52 52 Qualifier to discriminate revision date if present. (P=photorevision, I=photo- inspection, L=limited revision). 2 4 Scale of original INTEGER*4 I8 53 60 Scale denominator of source source material material, for example, 24000. --- Filler --- 61 63 3 spaces *The logical record length for the optional distribution format is 80 bytes, with 8 spaces of blank fill in bytes 73-80 of each record which may be used for a record sequence number. APPENDIX B.--Optional DLG Distribution Format (Record Contents)--continued FILE IDENTIFICATION AND DESCRIPTION RECORDS--continued Record Data Type Starting Ending Number Element Contents (Fortran Notation) Format Byte Byte Comment 2 5 Arbitrary quad ALPHA --- 64 66 Quad number assigned for USGS number (24K files) internal use. 2 Filler --- --- 67 72 6 spaces 3 Filler --- --- l 41 41 spaces 3 1 Largest primary ALPHA A4 42 45 Largest primary contour contour interval interval, followed by the interval unit (1=feet, 2=meters). Present only if two or more primary contour intervals exist. (Selected overlays.) 3 2 Comma ALPHA A1 46 46 Comma separator 3 3 Largest primary ALPHA A4 47 50 Largest primary bathy- bathymetric contour metric interval, followed interval by the interval unit (1=feet, 2=meters, 3=fathoms). Present only if two or more primary intervals exist. --- --- Filler 1 space 3 4 Smallest primary ALPHA A4 52 55 Smallest or only primary contour interval contour interval, followed by the interval unit (1= feet, 2=meters). (Selected overlays.) 3 5 Comma ALPHA A1 56 56 Comma separator APPENDIX B.--Optional DLG Distribution Format (Record Contents)--continued FILE IDENTIFICATION AND DESCRIPTION RECORDS--continued Record Data Type Starting Ending Number Element Contents (Fortran Notation) Format Byte Byte Comment 3 6 Smallest primary ALPHA A4 57 60 Smallest or only primary bathymetric contour bathymetric interval, interval followed by the interval unit (1=feet, 2=meters, 3=fathoms). 3 7-9 Coded Flags ALPHA A1 61 63 3 flags for future use 3 10 Coded Flag ALPHA A1 64 64 Database coded edge flag 3 11 EDGEWS ALPHA A1 65 65 Status flag for west edge, values are: b = unchecked, 0 = passed, 1 = alignment discontinuity, 2 = attribute discontinuity, 3 = attribute and alignment discontinuity. 3 12 EDGEWR ALPHA A1 66 66 Reason for EDGEWS, values are: b = unchecked, 4 = adjacent data do not exist, 5 = adjacent data unavail- able, 6 = temporal discon- tinuity, 7 = attribute mis- match valid, 8 = paneling unauthorized. 3 13 EDGENS ALPHA A1 67 67 Status flag for north edge, values = b,0,1,2, or 3 as above. 3 14 EDGENR ALPHA A1 68 68 Reason for EDGENS, values are b,4,5,6,7, or 8 as above. 3 15 EDGEES ALPHA A1 69 69 Status flag for east edge Values are b,0,1,2, or 3 as above. APPENDIX B.--Optional DLG Distribution Format (Record Contents)--continued FILE IDENTIFICATION AND DESCRIPTION RECORDS--continued Record Data Type Starting Ending Number Element Contents (Fortran Notation) Format Byte Byte Comment 3 16 EDGEER ALPHA A1 70 70 Reason for EDGEES. Values are b,4,5,6,7, or 8 as above. 3 17 EDGESS ALPHA A1 71 71 Status flag for south edge. Values are b,0,1,2, or 3 as above. 3 18 EDGESR ALPHA A1 72 72 Reason for EDGESS. Values are b,4,5,6,7, or 8 as above. 4 1 DLG level code INTEGER*2 I6 1 6 Code=3, DLG-3 4 2 Code defining ground INTEGER*2 I6 7 12 Code=l, UTM planimetric reference system 4 3 Code defining zone in INTEGER*2 I6 13 18 Codes for UTM coordinate ground planimetric zones are given in appendix reference system C. 4 4 Code defining units INTEGER*2 I6 19 24 Code=2, meters of measure for ground planimetric coordinates throughout the file 4 5 Resolution REAL*4 Dl8.ll 25 42 The true ground distance corresponding to one unit (0.00l inch at map scale) in the file internal coor- dinate system used in data collection. Scale Resolutions 1:24,000 0.61 M 1.25,000 0.635 M 1:48,000 1.22 M 1:62,500 1.587 M APPENDIX B.--Optional DLG Distribution Format (Record Contents)--continued FILE IDENTIFICATION AND DESCRIPTION RECORDS--continued Record Data Type Starting Ending Number Element Contents (Fortran Notation) Format Byte Byte Comment 4 6 Number of file-to- INTEGER*2 I6 43 48 Usually 4. map transformation parameters 4 7 Number of accuracy/ INTEGER*2 I6 49 54 Currently=0, none included miscellaneous records 4 8 Number (n) of sides INTEGER*2 I6 55 60 n = 4. in the polygon which define the coverage of the cell. Number (n) also defines the number of control-points 4 9 Number (q) of categories INTEGER*2 I6 61 66 Value of q may be from 1 to in the DLG file 32. The value will be 1. --- --- Filler --- --- 67 72 6 spaces 5-9 1 Projection parameters REAL*8 3D24.l5 l 72 Three parameters on each of for map transformation 5 records. Parameters for the UTM projection are given in Appendix C. 10 1 Internal file-to- REAL*4 4Dl8.ll 1 72 A transformation of this map projection type is not required, since transformation coordinates are expressed parameters in a ground planimetric coordinate system (usually UTM). These parameters are however, valid for trans- formation as described in record B.1, data element 1, of the standard format. APPENDIX B.--Optional DLG Distribution Format (Record Contents)--continued CONTROL-POINT IDENTIFICATION RECORDS Record Data Type Starting Ending Number Element Contents (Fortran Notation) Format Byte Byte Comment 1-n 1 Control-point label ALPHA A2 1 2 "SW," "NW," "NE," or "SE" for four quadrangle corners. Filler 3 6 4 spaces 2 Latitude REAL*4 Fl2.6 7 18 In degrees and decimal degrees. 3 Longitude REAL*4 Fl2.6 19 30 In degrees and decimal degrees. Filler 31 36 6 spaces 4 X coordinate REAL*4 Fl2.2 37 48 In units in the appropriate zone of the ground plani- metric coordinate system. 5 Y coordinate REAL*4 Fl2.2 49 60 In units in the appropriate zone of the ground plani- metric coordinate system. --- --- Filler --- --- 61 72 l2 spaces APPENDIX B.--Optional DLG Distribution Format (Record Contents)--continued DATA CATEGORY IDENTIFICATION RECORDS Record Data Type Starting Ending Number Element Contents (Fortran Notation) Format Byte Byte Comment 1-q 1 Category name ALPHA A20 1 20 The first 4 characters are unique. 2 Attribute format codes INTEGER*2 I4 21 24 Blank or zero (0) indicates default (2I6) attribute formatting in major-minor pairs. 3 Number of nodes refer- INTEGER*2 I6 25 30 Number of nodes referenced enced in file in file as start and end nodes of lines. 4 Actual number of INTEGER*2 I6 31 36 Only if some or all node nodes in file records were excluded from the file, would this number be different from data element 3. Filler --- --- 37 37 l space 5 Presence of node-to- INTEGER*2 Il 38 38 Flag=0, node-to-area area linkage records linkage records not present.1 6 Presence of node-to- INTEGER*2 Il 39 39 Flag=l, node-to-line line linkage records linkage records are included.1 --- Filler --- --- 40 40 l zero or space 7 Number of areas refer- INTEGER*2 I6 41 46 Number of areas referenced enced in file in file as areas left and areas right of lines. 1The flags for lists present or absent are the current default values, and are the only current values used. APPENDIX B.--Optional DLG Distribution Format (Record Contents)--continued DATA CATEGORY IDENTIFICATION RECORDS--continued Record Data Type Starting Ending Number Element Contents (Fortran Notation) Format Byte Byte Comment 1-q 8 Actual number of areas INTEGER*2 I6 47 52 Only if some or all area in file records were excluded from the file would the number be different from the data element 7. --- Filler --- --- 53 53 1 space 9 Presence of area-to- INTEGER*2 Il 54 54 Flag=0, area-to-node node linkage records linkage records not present.1 10 Presence of area-to- INTEGER*2 Il 55 55 Flag=l, area-to-line line linkage records linkage records are included.1 11 Presence of area- INTEGER*2 Il 56 56 Flag=0, area-coordinate coordinate lists lists not present.1 12 Number of lines INTEGER*2 I6 57 62 Number of lines referenced referenced in file in area-to-line and node- to-line records. 13 Actual number of INTEGER*2 I6 63 68 Only if some lines were lines in file excluded from the file would this number be different from data element 12. --- Filler --- --- 69 71 3 spaces 14 Presence of line- INTEGER*2 Il 72 72 Flag=l, line-coordinate coordinate lists lists are included.1 1The flags for lists present or absent are the current default values, and are the only current values used. APPENDIX B.--Optional DLG Distribution Format (Record Contents)--continued NODE AND AREA IDENTIFICATION RECORDS Record Data Type Starting Ending Number Element Contents (Fortran Notation) Format Byte Byte Comment 1 Record type ALPHA Al 1 1 "N" or "A" 2 Element internal INTEGER*2 I5 2 6 This number is positive and ID number sequential from 1-n within each category and element type. 3 Coordinates of node REAL*4 2Fl2.2 7 30 The area point is usually, point or representative but not always within the point for area polygon it represents. 4 Number of elements in INTEGER*2 I6 31 36 Blank or zero (0). These an area list (for nodes), lists are not currently or in a node list included. (for areas) 5 Number of elements in INTEGER*2 I6 37 42 Number of line segments line segment list that intersect at the node, or bound the area. 6 Number of x,y or INTEGER*2 I6 43 48 Blank or zero (0). These lat-long points lists are not currently in area-coordinate included. list 7 Number of attribute INTEGER*2 I6 49 54 Number of attribute codes codes listed listed. 8 Number of text INTEGER*2 I6 55 60 Zero (0). There are no characters listed text attributes for 7.5- and 15-minute DLG data. 9 Number of islands INTEGER*2 I6 61 66 Area records only, 6 spaces within area for node records. --- --- Filler --- --- 67 72 6 spaces APPENDIX B.--Optional DLG Distribution Format (Record Contents)--continued NODE-TO-LINE LINKAGE RECORDS FORTRAN FORMAT (l2I6), for each node: The list consists of line segment internal ID numbers (which appear in bytes 2-6 of the line identification records). The line segments which begin at this node are included in the list as positive ID numbers. The line segments which terminate at this node are included as negative ID numbers. There is no logical order to the list. AREA-TO-LINE LINKAGE RECORDS FORTRAN format (l2l6), for each area: The list consists of line segment internal ID numbers (which appear in bytes 2-6 of the line identification records) and, for those areas with islands (indicated by bytes 6l-66 of the area's first record), zero (0) elements marking the beginning of islands. Line segments with this area to the right are included as positive ID numbers. Line segments with this area to the left are included as negative ID numbers. The list is ordered clockwise around the perimeter of the area and counterclockwise around each island, if any (counterclockwise around an island of an area is still a clockwise direction in reference to the area itself). A zero (0) element is inserted in the list before each island sublist. APPENDIX B.--Optional DLG Distribution Format (Record Contents)--continued LINE IDENTIFICATION RECORDS Record Data Type Starting Ending Number Element Contents (Fortran Notation) Format Byte Byte Comment l Record type Al l l "L" 2 Element internal ID number I5 2 6 This number is positive and sequential from 1-n within each category and element type. 3 Starting node I6 7 l2 Internal ID number. This refers to data element 2 of the node identification record. 4 Ending node I6 l3 l8 Internal ID number. This refers to data element 2 of the node identification record. 5 Left area I6 l9 24 Internal ID number. This refers to data element 2 of the area identification record. 6 Right area I6 25 30 Internal ID number. This refers to data element 2 of the area identification record. --- Filler --- 3l 42 l2 spaces 7 Number of x,y coordinates I6 43 48 Number of coordinate listed pairs listed. 8 Number of attribute codes I6 49 54 Number of attribute codes listed (or two element attribute pairs) listed. 9 Number of text characters listed I6 55 60 Zero (0). There are no text data associated with 7.5- and l5-minute DLG data. APPENDIX B.--Optional DLG Distribution Format (Record Contents)--continued COORDINATE STRING RECORDS FORTRAN format (3(2Fl2.2)): The coordinates are in appropriate units in the designated ground planimetric coordinate system (usually meters in UTM). The file-to-map projection parameters in Header record l0 are set to (l.0,0.0,0.0,0.0) for real map projection coordinates (the transformation formulas still apply). CODE RECORDS As major-minor code attribute pairs, FORTRAN format (6(2I6)): Within each pair, the first integer is the major code and the second integer is the minor code. Each major and minor code is a one-to-four-digit integer, right justified within the six-byte field. APPENDIX C.--Map Projection Parameters Universal Transverse Mercator (UTM) The standard and optional DLG distribution formats include 15 fields reserved for map projection parameters. These parameters are typically used as input for a coordinate transformation package such as the USGS General Cartographic Transformation Package (GCTP). When the ground coordinate system of a DLG is the Universal Transverse Mercator system, as in the case for all DLG's digitized from 1:24,000scale maps, only the first two of the 15 parameter fields are used: 1. Longitude of any point in UTM zone. Normally placed at 2. Latitude of any point in UTM zone. the center of the DLG cell. 3-15. Not used (=0). A transformation to or from UTM using GCTP can be controlled by specifying the UTM zone or by supplying the geographic coordinate in parameters 1 and 2, from which the UTM zone is computed by GCTP. In a DLG file, the parameters are encoded as packed, degrees-minutes-seconds (DMS) as follows: degrees * 1000000 + minutes * 1000 + seconds Example: If degrees = +50, minutes = 30, and seconds = 36.25, then the parameter value is 50030036.25 stored as a REAL*8 variable, and "bbb0.500300362500000D 08" encoded in FORTRAN D24.15 format. Codes for UTM Coordinate Zones West Longitude (degrees) Zone 180-174 1 174-168 2 168-162 3 162-156 4 156-150 5 150-144 6 144-138 7 138-132 8 132-126 9 126-120 10 120-114 11 114-108 12 108-102 13 102- 96 14 96- 90 15 90- 84 16 84- 78 17 78- 72 18 72- 66 19 66- 60 20 APPENDIX D.--DLG Attribute Codes MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Hypsography Feature identification Nodes 020 NONE Areas 020 0100 Void area Lines 020 0200 Contour (index or intermediate) 0201 Carrying contour 0202 Supplementary contour 0203 Continuation contour 0204 Auxiliary contour 0205 Bathymetric contour 0206 Depth curve 0207 Watershed divides 0299 Processing line Points 020 0300 Spot elevation, less than (degenerate lines) third order 020 0301 Spot elevation, less than third order, not at ground level Multiple element 020 NONE types Descriptive Multiple element 020 0600- Decimal fractions of feet types 0609 or meters 0610 Approximate 0611 Depression 0612 Glacier or snow field 0613 Underwater 0614 Best estimate of contour elevation value 020 0000 Photorevised feature Parameter Multiple element 02N ---- Elevation in whole feet or types meters, right-justified 029 00-- Coincident feature APPENDIX D.--DLG Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Hydrography Feature identification Nodes 050 000l Upper origin of stream 0002 Upper origin of stream at water body 0003 Sink, channel no longer evident 0004 Stream entering water body 0005 Stream exiting water body Areas 050 0l00 Alkali flat 0l0l Reservoir 0l02 Covered reservoir 0l03 Glacier or permanent snowfield 0l04 Salt evaporator 0l05 Inundation area 0l06 Fish hatchery or farm 0l07 Industrial water impoundment 0l08 Area to be submerged 0l09 Sewage disposal pond or filtration beds 0ll0 Tailings pond or settling basin 0lll Marsh, wetland, swamp, bog 0ll2 Mangrove area 0ll3 Rice field 0ll4 Cranberry bog 0ll5 Flats (tidal, mud, sand, gravel) 0ll6 Bays, estuaries, gulfs, oceans, seas 0117 Shoal 0118 Soda evaporator 0119 Duck Pond Lines 050 0200 Shoreline 020l Manmade shoreline 0202 Closure line 0203 Indefinite shoreline 0204 Apparent limit 0205 Outline of a Carolina bay 0206 Danger curve 0207 Apparent shoreline 0208 Sounding datum 0209 Low water line 0299 Processing line APPENDIX D.--DLG Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Hydrography Feature identification Points 050 0300 Spring (cont'd.) (degenerate lines) 030l Non-flowing well 0302 Flowing well 0303 Riser 0304 Geyser 0305 Windmill 0306 Cistern Multiple element 050 0400 Rapids types 040l Falls 0402 Gravel pit or quarry filled with water 0403 Gaging station 0404 Pumping station 0405 Water intake 0406 Dam or weir 0407 Canal lock or sluice gate 0408 Spillway 0409 Gate (flood, tidal, head, check) 04l0 Rock 04ll Crevasse 04l2 Stream 04l3 Braided stream 04l4 Ditch or canal 04l5 Aqueduct 04l6 Flume 04l7 Penstock 04l8 Siphon 04l9 Channel in water area 0420 Wash or ephemeral drain 042l Lake or pond 0422 Coral reef 0423 Sand in open water 0424 Spoil area 0425 Fish ladders 0426 Holiday area APPENDIX D.--DLG Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Hydrography Descriptive Multiple element 050 060l Underground (cont'd.) types 0602 Overpassing 0603 Elevated 0604 Tunnel 0605 Right bank 0606 Left bank 0607 Under construction 0608 Salt 0609 Unsurveyed 06l0 Intermittent 06ll Abandoned or discontinued 06l2 Submerged or sunken 0613 Wooded 06l4 Dry 06l5 Mineral or hot (sulphur, alkali, etc.) 06l6 Navigable, transportation 06l7 Underpassing 0618 Earthen construction 0621- Decimal fractions in 0629 feet or meters 050 0000 Photorevised feature Parameter Multiple element 05N ---- Water surface elevation types N=l for feet, 2 for meters, 6 for feet below datum, and 7 for whale meters below datum. Elevation value in four spaces, right justified. 053 0--- Angle of clockwise rotation (nearest whole degree) 055 ---- River mile, value in four spaces, right justified 058 0000 Best estimate of classification or position 059 00-- Coincident feature APPENDIX D.--DLG Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Vegetative Surface Cover Feature identification Nodes 070 NONE Areas 070 0101 Woods or brushwood 0102 Scrub 0103 Orchard or plantation 0104 Vineyard 0105 Scattered trees Lines 070 0200 Closure line 070 0299 Processing line Points 070 NONE Multiple element 070 NONE types Descriptive Multiple element 070 0000 Photorevised feature types Parameter Multiple element 078 0000 Best estimate of position or types classification 079 00-- Coincident feature Nonvegetative Feature identification Nodes 080 NONE Features Areas 080 0100 Glacial moraine 0101 Gravel beach 0102 Sand beach 0103 Shifting sand or dune area 0104 Lava Lines 080 0299 Processing line Points 080 0300 Located surface feature (degenerate lines) APPENDIX D.--DLG Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Nonvegetative Feature identification Multiple element 080 NONE Features (cont'd.) (cont'd.) types Descriptive Multiple element 080 0000 Photorevised feature types Parameter Multiple element 088 0000 Best estimate of position or types classification 089 00-- Coincident feature Boundaries Feature identification Nodes 090 0001 Monumented point on a boundary Areas 090 0100 Civil township, district, precinct, or barrio 0101 Incorporated city, village, town, borough, or hamlet 0103 National park, monument, lakeshore, seashore, parkway, battlefield, or recreation area 0104 National forest or grassland 0105 National wildlife refuge, game preserve, or fish hatchery 0106 National scenic waterway, riverway, wild and scenic river, or wilderness area 0107 Indian reservation 0108 Military reservation 0110 Federal prison 0111 Miscellaneous Federal reservation 0129 Miscellaneous State reservation 0130 State park, recreation area, arboretum, or lake 0131 State wildlife refuge, game preserve, or fish hatchery 0132 State forest or grassland 0133 State prison 0134 County game preserve 0135 Ahupuaa (Hawaii) 0136 Homestead (Hawaii) APPENDIX D.--DLG Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Boundaries (cont'd.) Feature identification Areas (cont'd.) 090 0150 Large park (city, county, or private) (cont'd.) 0151 Small park (city, county, or private) 0197 Canada 0198 Mexico 0199 Open water Lines 090 0201 Indefinite (or approximate) boundary 0202 Disputed boundary 0203 Historical line 0204 Boundary closure line 0299 Processing line Points 090 0301 Reference monuments for boundary (degenerate lines) points Multiple element 090 NONE types Descriptive Multiple element 090 0000 Photorevised feature types Parameter Multiple element 091 00-- State or state equivalent FIPS code types 092 0--- County or county equivalent FIPS code 095 ---- Monument number 099 00-- Coincident feature Survey Control and Markers Feature identification Nodes 150 0300- Node elements only when located on 0332 a closure line otherwise points (degenerate lines) Areas 150 0100 Void area Lines 150 0200 Closure line Points 150 0300 Horizontal control station, third (degenerate lines) order or better, permanent mark 0301 Horizontal and vertical control station, third order or better 0302 Horizontal control station, vertical angle bench mark (VABM) APPENDIX D.--DLG Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Survey Control and Feature identification Points 0303 Horizontal control station, checked Markers (cont'd.) (cont'd.) (degenerate lines) spot elevation 0310 Vertical control station, third order or better, tablet 0311 Vertical control station, recoverable mark, third order or better, no tablet 0320 Boundary monument, third order or better, tablet 0321 Boundary monument, third order or better, no tablet 0330 Reference monument 0331 U.S. Mineral or location monument 0332 Other control point Multiple element types NONE Descriptive Multiple element 150 0000 Photorevised feature types 150 0601- Fractions of elevation values 0609 Parameter Multiple element types 151 ---- State or state equivalent FIPS code 152 ---- County or county equivalent FIPS code 153 ---- Elevation in feet 154 ---- Elevation in meters 156 ---- Elevation minus 10,000, for elevations greater than 9,999 feet 159 00-- Coincident feature Transportation, Roads Feature identification Nodes l70 000l Bridge abutment and Trails 0002 Tunnel portal 0004 Gate 0005 Cul-de-sac 0006 Dead end 0007 Drawbridge APPENDIX D.--DLG Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Transportation, Roads, Feature identification Areas 170 0100 Void area and Trails (cont'd.) (cont'd.) Lines l70 020l Primary route, class 1, symbol undivided 0202 Primary route, class 1, symbol divided by centerline 0203 Primary route, class 1, divided, lanes separated 0204 Primary route, class 1, one way, other than divided highway 0205 Secondary route, class 2, symbol undivided 0206 Secondary route, class 2, symbol divided by centerline 0207 Secondary route, class 2, symbol divided, lanes separated 0208 Secondary route, class 2, one way, other then divided highway 0209 Road or street, class 3 0210 Road or street, class 4 0211 Trail, class 5, other than four-wheel- drive vehicle 02l2 Trail, class 5, four-wheel-drive vehicle 0213 Footbridge 02l4 Road ferry crossing 02l5 Perimeter of parking area 02l6 Arbitrary extension of line (join or closure) 02l7 Road or street, class 3, symbol divided by centerline 0218 Road or street, class 3, divided lanes separated 0219 Road or street, class 4, one way 0220 Closure line 0221 Road or street, class 3, one way 0222 Road in transition 0299 Processing line Points NONE (degenerate lines) APPENDIX D.--DLG Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Transportation, Roads, Feature identification Multiple element l70 0401 Traffic circle and Trails (cont'd.) (cont'd.) types 0402 Cloverleaf or interchange 0403 Toll gate, toll plaza or perimeter of toll plaza 0404 Weigh station 0405 Nonstandard section of road Descriptive Multiple element 170 0601 In tunnel types 0602 Overpassing, on bridge 0603 Under construction, classification known 0604 Under construction, classification unknown 0605 Labeled "old railroad grade" 0606 Submerged or in ford 0607 Underpassing 0608 Limited access 0609 Toll road 0610 Privately operated or controlled public access 0611 Proposed 0612 Double-decked 0613 In service facility or rest area 0614 Elevated 0615 Bypass route 0616 Alternate route 0617 Business route 0618 On drawbridge 0619 Spur 0620 Loop 0621 Connector 0622 Truck route 0650 Road width 46-55 feet, 0.025 inches at 1:24,000 0651 Road width 56-65 feet, 0.030 inches at 1:24,000 0652 Road width 66-75 feet, 0.035 inches at 1:24,000 APPENDIX D.--DLG Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Transportation, Roads, Descriptive (cont'd.) Multiple element 170 0653 Road width 76-85 feet, 0.040 inches and trails (cont'd.) types at 1:24,000 (cont'd.) 0654 Road width 86-95 feet, 0.045 inches at 1:24,000 0655 Road width 96-105 feet, 0.050 inches at 1:24,000 0656 Road width 106-115 feet, 0.055 inches at 1:24,000 0657 Road width 116-125 feet, 0.060 inches at 1:24,000 0658 Road width 126-135 feet, 0.065 inches at 1:24,000 0659 Road width 136-145 feet, 0.070 inches at 1:24,000 170 0000 Photorevised feature Parameter Multiple element 171 ---- Number of lanes types 172 ---- Interstate route number 173 ---- U.S. route number 174 ---- State route number 175 ---- Reservation, park, or military route number 176 ---- County route 177 XXYY Alphabetic portion of any route number. Substitute numeric equiva- lent of alphabetic for XX and for YY as follows: 00 = blank, 01 = A, 02 = B, 03 = C, 04 = D, 05 = E, 06 = F, 07 = G, 08 = H, 09 = I, 10 = J, 11 = K, 12 = L, 13 = M, 14 = N, 15 = O, 16 = P, 17 = Q, 18 = R, 19 = S, 20 = T, 21 = U, 22 = V, 23 = W, 24 = X, 25 = Y, 26 = Z. APPENDIX D.--DLG Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Transportation, Roads, Parameter (con't.) Multiple element 178 0000 Best estimate of position or and Trails (cont'd.) types (cont'd.) classification 179 00-- Coincident feature Transportation, Feature identification Nodes 180 0001 Bridge abutment Railroads 0002 Tunnel portal 0007 Drawbridge Areas 180 0100 Void area Lines 180 0201 Railroad 0202 Railroad in street or road 0204 Carline 0205 Cog railroad, incline railway, logging tram 0207 Railroad ferry crossing 0208 Railroad siding 0209 Perimeter or limit of yard 0210 Arbitrary line extension (join, closure) 0299 Processing line Points 180 NONE (degenerate lines) Multiple element 180 0400 Railroad station, perimeter of types station 0401 Turntable 0402 Roundhouse Descriptive Multiple element 180 0601 In tunnel types 0602 Overpassing, on bridge 0603 Abandoned 0604 Dismantled 0605 Underpassing 0606 Narrow gauge 0607 In snowshed or under structure 0608 Under construction APPENDIX D.--DLG Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Transportation, Descriptive (cont'd.) Multiple element 180 0609 Elevated Railroads (cont'd.) types (cont'd.) 0610 Rapid transit 0611 On drawbridge 0612 Private 0613 U.S. Government 0614 Juxtaposition 180 0000 Photorevised feature Parameter Multiple element 181 ---- Number of tracks types 183 0--- Angle of clockwise rotation (nearest whole degree) types 188 0000 Best estimate of position or classification 189 00-- Coincident feature Transportation, Feature identification Nodes 190 0001 End of transmission line at Pipelines, Trans- power station, substation, or mission Lines, hydroelectric plant Miscellaneous Trans- 0002 End of pipeline at oil or gas portation Features field 0003 End of pipeline at refinery, depot, or tank farm Areas 190 NONE Lines 190 0201 Pipeline 0202 Power transmission line 0203 Telephone or telegraph line 0204 Aerial tramway, monorail, ski lift 0205 Arbitrary extension closure line Points 190 0300 Seaplane anchorage (degenerate lines) Multiple element 190 0400 Power station types 0401 Substation 0402 Hydroelectric Plant APPENDIX D.--DLG Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Transportation, Feature Identification Multiple element 190 0403 Landing strip, airport, Pipelines, Trans- (cont'd.) types (cont'd.) perimeter of airport mission Lines, 0404 Heliport, perimeter of heliport Miscellaneous Trans- 0405 Launch complex, perimeter of portation Features launch complex (cont'd.) 0406 Pumping station (other than water) 0407 Seaplane ramp or landing area 0408 Measuring station, valve station Descriptive Multiple element 190 0600 Underground types 0601 Under construction 0602 Abandoned 0603 Above ground 0604 Labeled "closed" 0605 Unimproved, loose surface 0606 Submerged 0607 Nuclear 190 0000 Photorevised feature Parameters Multiple element 193 0--- Angle of clockwise rotation types (nearest whole degree) 198 0000 Best estimate of position or classification 199 00-- Coincident feature Manmade Features Feature identification Nodes 200 NONE Areas 200 0100 Church complex (convent, retreat, etc.) 0101 School campus (university, college, etc.) 0102 Hospital complex (sanatorium, nursing home, etc.) 0103 Orphanage APPENDIX D.--DLG Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Manmade Features Feature identification Areas (cont'd.) 200 0104 Prison compound (cont'd.) (cont'd.) 0105 Trailer park 0120 Ski area 0122 Athletic field 0123 Golf course 0124 Shopping center 0125 Zoo 0126 Drive-in theater 0127 Race track, raceway 0128 Playground 0140 Marina 0141 Cable area 0150 Built-up, urban, or house-omission area 0160 Industrial park 0161 Materials storage area 0162 Refinery or industrial plant 0163 Tailings 0164 Intricate surface area 0165 Oil sump or sludge pit 0180 Tank farm 0181 Feedlot 0182 Experimental farm 0183 Proving grounds 0184 Firing range 0190 Void area Lines 0200 Conveyor 0201 Boardwalk 0202 Wall 0203 Sea wall 0206 Fence line 0207 Flume (nonwater) 0209 Sewer line 0211 Coke ovens 0212 Recreational slide 0213 Screen (drive-in theatre) 0214 Drag strip 0215 Athletic track 0250 Arbitrary closure line 0299 Processing line APPENDIX D.--DLG Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Manmade Features Feature identification Points 200 0300 Grave site (cont'd.) (cont'd.) (degenerate lines) 0301 Historical marker 0302 Mine tunnel entrance or cave 0303 Mine shaft 0304 Prospect 0305 Tower 0306 Burner/stack 0307 Drilled well 0308 Cliff dwelling 0309 Light 0310 Brick kiln 0311 Drill hole 0312 Watermill 0313 Anchorage 0314 Guzzler 0315 Located object, landmark object Multiple element 200 0400 Class 1 building types 0401 Class 2 building 0402 Church 0403 School 0404 Municipal building 0405 Courthouse 0406 Post office 0407 City or town hall 0408 Hospital 0409 Prison 0410 Town, village, settlement, locality, unincorporated village 0411 Amphitheater 0420 Cemetery 0421 Sewage disposal plant 0422 Waterworks 0423 Oil reservoir 0424 Drilled well field 0425 Tank 0426 Offshore oil or gas platform 0427 Mine dump 0428 Open pit mine 0429 Quarry APPENDIX D.--DLG Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Manmade Features Feature identification Multiple element 200 0430 Strip mine (cont'd.) (cont'd.) types (cont'd.) 0431 Land fill 0432 Pit, unconsolidated material 0433 Radio or television facility 0434 Storage bin 0435 Levee 0436 Spoil bank 0445 Fairgrounds 0446 Rodeo grounds 0447 Corral 0448 Boat ramp 0449 Campground, campsite 0450 Fort 0451 Swimming pool 0452 Archaeological site, ruin 0453 Recreation area, public use area 0454 Picnic area 0455 Port of entry 0456 Stadium 0465 Pile, dolphin, stump, or snag 0466 Breakwater, jetty, pier, dock, causeway, or wharf 0467 Exposed wreck or wreckage 0468 Sunken wreck 0469 Drydock Descriptive Multiple element 200 0601 Underground types 0602 Under construction 0603 Abandoned 0604 Water 0605 Oil 0606 Gas 0607 Chemical 0608 Covered 0609 Gravel 0610 Sand 0611 Clay 0612 Borrow APPENDIX D.--DLG Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Manmade Features Descriptive (cont'd.) Multiple element 200 0613 Radio (cont'd.) types (cont'd.) 0614 Lookout 0615 Unincorporated 0616 No population 0617 Submerged 0618 Ruin 200 0000 Photorevised feature Parameter Multiple element 203 0--- Angle of clockwise rotation (nearest types whole degree) 202 ---- Width in mils of feature to scale 208 0000 Best estimate of position or classification 209 00-- Coincident feature or symbol U.S. Public Land Feature identification Nodes 300 000l U.S. Public Land Survey System Survey System (PLSS) section corner 0002 Point on section line (no corner) 0003 Closing corner 0004 Meander corner 0005 Auxiliary meander corner 0006 Special meander corner 0007 Witness corner 0008 Witness point 0009 Angle point 00l0 Location monument (includes amended monument and mineral monument) 00ll Reference mark 00l2 Quarter-section corner 00l3 Tract corner 00l4 Land grant corner 00l5 Arbitrary section corner Nodes (identifi- 300 0040 Corner identified in field cation procedures 004l Corner with horizontal coordinates 0042 Corner with elevation value APPENDIX D.--DLG Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION U.S. Public Land Parameters Areas Select one parameter code from each of Survey System (PLSS) the following A, B, C, and D lists (cont'd) and/or consult list E. A. Origin of Survey 306 00--Insert two-digit code from Appendix K. B. Township number(s) 30- ----Insert 2 for north of the baseline or 3 for south of the baseline in first space. In the second space, insert a 0 for full township, 2 for l/4 township, 4 for l/2 township, or 6 for 3/4 township. Insert township number in the last three spaces, right justified. C. Range number(s) 30- ----Insert 4 for east of the principal meridian or 5 for west of the principal meridian in the first space. In the second space, insert a 0 for a full range, 2 for l/4 range, 4 for l/2 range, 6 for 3/4 range, 8 for duplicate to the north or east of the original township, or 9 for triplicate to the north or east of the original township. Insert range number in last three spaces, right justified. APPENDIX D.--DLG Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION U.S. Public Land Parameters Areas (cont'd.)D. Section number Survey System (PLSS) (cont'd) 30l ----In the first space, insert 0 for numeric section identifier, l for numeric portion of alphanumeric identifier, or 2 for alphabetic part of alphanumeric identifier. In the last three spaces, insert section number or numeric representation of alphabetic character (0l-26), right justified. E. Land grant identifier 307 ----In the first space, insert the appropriate number: 0for numeric grant identifier 1for numeric portion of alphanumeric identifier 2for alphabetic portion of alphanumeric identifier 3for alphabetic identifier 4for identifier of named grant in Arizona 5for identifier of named grant in California 6for identifier of named grant in Colorado 7for identifier of named grant in New Mexico In the last three spaces after 0-3 above, insert the grant number or numeric representation of the alphabetic character (01-26), right-justified. In the last three spaces after 4-7 above, insert the three-digit code of the named grant as designated in Appendix L. APPENDIX D.--DLG Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION U.S. Public Land Parameters Areas (cont'd) F. Excluded areas Survey System (PLSS) (cont'd) 3000100 Indian lands 0l0l Homestead entries 0l02 Donation land claims 0l03 Land grants; civil colonies 0l04 Private extension of public land survey 0l05 Area of public and private survey overlap 0l06 Overlapping land grants 0l07 Military reservation 0l98 Water 0l99 Unsurveyed area Feature identification Lines 300020l Approximate position (within 200 feet) 0202 Protracted position 0203 Arbitrary closure line 0204 Base line 0205 Claim line, grant line Points 3000300 Location monument (degenerate lines)0301 Isolated found section corner 0302 Witness corner (off surveyed line) Parameter Multiple element 3080000 Best estimate of classification and/or types position 30900-- Coincident feature or symbol APPENDIX E.--Coordinate Conversion This appendix illustrates the procedure for converting the internal file coordinates of the standard DLG format to the ground planimetric UTM reference coordinates. The formulas for this conversion, representing a simple offset, rotation, and scale, are as follows: X = Alx + A2y + A3, and Y = Aly - A2x + A4, where X and Y are the ground planimetric coordinate values and x and y are the internal file coordinates. The parameters for these formulas (Al, A2, A3, and A4) are contained in Header Record B, as double-precision floating-point numbers. This example converts four coordinate pairs from internal file coordinates to ground planimetric UTM zone l0 coordinate values. The parameters are as follows: A1 = 0.60959440759 A2 = -0.0028817856942 A3 = 538248.79341 A4 = 4240374.4556 The internal file coordinates to be converted are as follows: x y 1st pair-8971 -11376 2nd pair-8955 11375 3rd pair 8955 11376 4th pair 8971 -11376 The calculations to determine the ground planimetric coordinates for the first pair are as follows: X = (0.60959440759) (-8971) + (-0.0028817856942) (-11376) + (538248.79341) = 5328l2.91 Y = (0.60959440759) (-11376) - (-0.0028817856942) (-8971) + (4240374.4556) = 4233413.86 The resulting X,Y coordinate values for the four pairs are as follows: X Y 1st pair 532,812.91 4,233,413.86 2nd pair 532,757.10 4,247,282.79 3rd pair 543,674.93 4,247,335.01 4th pair 543,750.25 4,233,465.56 APPENDIX F.--Sample DLG Data File (Standard Distribution Format) (Each 144-character record is shown as two consecutive 72-character lines.) GLEN ELLEN 1968 24000 3 1 10 -0.122033045000000D 09 0.380180450000000D 08 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2 0.610000000000000D 00 0 4 -0.122625000000000D 03 0.382500000000000D 02 -0.122625000000000D 03 0.383750000000000D 02 -0.122500000000000D 03 0.383750000000000D 02 -0.122500000000000D 03 0.382500000000000D 02 0.609594407590000D 00 -0.288178569420000D-02 0.538248793410000D 06 0.424037445560000D 07 4 SW -8971-11376NW -8955 11375NE 8955 11376SE 8971-11376 1 BOUNDARIES (24&25) 795 16 795 7 530 20 N 1 -8971-11376 0 0 N 2 -8955 11375 0 0 N 3 8955 11376 0 0 N 4 8971-11376 0 0 N 5 -8966 3203 0 0 N 6 2101 11374 0 0 N 7 5832 11376 0 0 N 8 7513 11376 0 0 N 9 8956 7494 0 0 N 10 8961 2884 0 0 N 11 3469 10371 0 0 N 12 5530 9112 0 0 N 13 -3115-10127 0 0 N 14 7520 11175 1 0 90 1 APPENDIX F.--Sample DLG Data File (Standard Distribution Format)--continued (Each 144-character record is shown as two consecutive 72-character lines.) N 15 -1450 4596 1 0 90 1 N 16 895 4984 1 0 90 1 A 1 22 253 1 0 0 0 A 2 -4738 7527 2 0 91 6 92 97 A 3 8325 10166 2 0 91 6 92 97 A 4 4728 10834 3 0 91 6 92 97 90 113 A 5 6463 8917 3 0 91 6 92 97 90 113 A 6 161 -1378 3 0 91 6 92 97 90 113 A 7 -3058-10280 4 0 91 6 92 97 90 113 90 130 L 1 1 5 1 6 2 0 0 -8971-11376 -8966 3203 L 2 5 2 1 2 2 0 0 -8966 3203 -8955 11375 L 3 2 6 1 2 2 0 0 -8955 11375 2101 11374 APPENDIX F.--Sample DLG Data File (Standard Distribution Format)--continued (Each 144-character record is shown as two consecutive 72-character lines.) L 4 6 7 1 2 4 0 0 2101 11374 5832 11376 L 5 7 8 1 2 5 2 0 5832 11376 7513 11376 L 6 8 3 1 3 2 0 0 7513 11376 8955 11376 L 7 3 9 1 3 2 0 0 8955 11376 8956 7494 L 8 9 10 1 5 2 0 0 8956 7494 8961 2884 L 9 10 4 1 6 2 0 0 8961 2884 8971-11376 L 10 4 1 1 6 2 0 0 8971-11376 -8971-11376 L 11 13 13 7 6 6 0 0 -3115-10127 -3189-10286 -2985-10432 -2890-10296 -2943-10236 -3115-10127 L 12 5 15 2 6 4 2 0 -8966 3203 -5538 798 -1933 5820 -1450 4596 99 30 90 203 L 13 15 16 2 6 2 2 0 -1450 4596 895 4984 99 30 90 203 L 14 14 8 5 3 2 2 0 7520 11175 7513 11376 99 30 90 203 APPENDIX F.--Sample DLG Data File (Standard Distribution Format)--continued (Each 144-character record is shown as two consecutive 72-character lines.) L 15 14 9 3 5 5 2 0 7520 11175 7532 10014 7228 9681 7318 8896 8956 7494 99 30 90 203 L 16 16 11 2 6 116 2 0 8954984 403 5222 275 5186 2615244 247 5272 188 5344 1665364 146 5388 117 5441 1075501 110 5561 104 5591 1065621 122 5681 144 5769 1695829 199 5882 236 5931 2575952 313 5979 336 5999 3506028 362 6087 362 6147 3526208 350 6238 355 6268 3726295 415 6339 427 6367 4876471 496 6500 482 6682 4916742 496 6803 510 6891 5126921 507 6955 507 6984 5167015 530 7040 553 7062 6297111 656 7124 686 7132 7417160 800 7179 858 7205 9217210 982 72231011 7236 10267261 1068 73091119 7386 11817491 1228 75291254 7543 12857548 1316 75581339 7577 ...etc.... APPENDIX G.--Sample DLG Data File (Optional Distribution Format) (Each 80-character record is shown as a single line.) USGS-NMD DLG DATA - CHARACTER FORMAT - 09-29-82 VERSION GLEN ELLEN 1968 24000 3 1 10 2 0.61000000000D+00 4 0 4 1 -0.122033045000000D+09 0.380180450000000D+08 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.10000000000D+01 0.0 0.0 0.0 SW 38.250000 -122.625000 532812.91 4233413.86 NW 38.375000 -122.625000 532757.10 4247282.79 NE 38.375000 -122.500000 543674.93 4247335.01 SE 38.250000 -122.500000 543750.25 4233465.56 BOUNDARIES (24&25) 0 16 16 010 7 7 010 20 20 1 N 1 532812.91 4233413.86 2 0 0 1 -10 N 2 532757.10 4247282.79 2 0 0 -2 3 N 3 543674.93 4247335.01 2 0 0 -6 7 N 4 543750.25 4233465.56 2 0 0 -9 10 N 5 532773.94 4242301.15 3 0 0 -1 2 12 N 6 539496.77 4247314.04 3 0 0 -3 4 17 N 7 541771.16 4247326.01 3 0 0 -4 5 -19 N 8 542795.89 4247330.85 3 0 0 -5 6 -14 N 9 543686.72 4244968.57 3 0 0 -7 8 -15 N 10 543703.06 4242158.35 3 0 0 -8 9 -20 N 11 540333.59 4246706.56 3 0 0 -16 -17 18 N 12 541593.59 4245945.02 3 0 0 -18 19 20 N 13 536379.09 4234192.12 2 0 0 11 -11 N 14 542800.74 4247208.34 2 1 0 14 15 90 1 N 15 537351.64 4243171.97 2 1 0 -12 13 90 1 N 16 538780.02 4243415.25 2 1 0 -13 16 90 1 APPENDIX G.--Sample DLG Data File (Optional Distribution Format)--continued (Each 80-character record is shown as a single line.) A 1 538261.48 4240528.75 10 0 1 0 0 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 0 A 2 535338.84 4244949.22 6 0 2 0 0 -12 2 3 17 -16 -13 91 6 92 97 A 3 543294.37 4246595.58 4 0 2 0 0 -15 14 6 7 91 6 92 97 A 4 541099.73 4246992.43 4 0 3 0 0 -17 4 -19 -18 91 6 92 97 90 113 A 5 542162.91 4245828.83 6 0 3 0 0 19 5 -14 15 8 -20 91 6 92 97 90 113 A 6 538350.91 4239534.90 10 0 3 0 1 10 1 12 13 16 18 20 9 0 11 91 6 92 97 90 113 A 7 536414.28 4234099.01 1 0 4 0 0 -11 91 6 92 97 90 113 90 130 L 1 1 5 1 6 2 0 0 532812.91 4233413.86 532773.94 4242301.15 L 2 5 2 1 2 2 0 0 532773.94 4242301.15 532757.10 4247282.79 L 3 2 6 1 2 2 0 0 532757.10 4247282.79 539496.77 4247314.04 L 4 6 7 1 4 2 0 0 539496.77 4247314.04 541771.16 4247326.01 L 5 7 8 1 5 2 0 0 541771.16 4247326.01 542795.89 4247330.85 L 6 8 3 1 3 2 0 0 542795.89 4247330.85 543674.93 4247335.01 L 7 3 9 1 3 2 0 0 543674.93 4247335.01 543686.72 4244968.57 L 8 9 10 1 5 2 0 0 543686.72 4244968.57 543703.06 4242158.35 L 9 10 4 1 6 2 0 0 543703.06 4242158.35 543750.25 4233465.56 L 10 4 1 1 6 2 0 0 543750.25 4233465.56 532812.91 4233413.86 L 11 13 13 7 6 6 0 0 536379.09 4234192.12 536334.44 4234094.98 536459.22 4234006.56 536516.74 4234089.74 536484.26 4234126.17 536379.09 4234192.12 L 12 5 15 2 6 4 2 0 532773.94 4242301.15 534870.56 4240844.95 537053.68 4243916.72 537351.64 4243171.97 99 30 90 203 APPENDIX G.--Sample DLG Data File (Optional Distribution Format)--continued (Each 80-character record is shown as a single line.) L 13 15 16 2 6 2 2 0 537351.64 4243171.97 538780.02 4243415.25 99 30 90 203 L 14 14 8 5 3 2 2 0 542800.74 4247208.34 542795.89 4247330.85 99 30 90 203 L 15 14 9 3 5 5 2 0 542800.74 4247208.34 542811.40 4246500.64 542627.04 4246296.77 542684.17 4245818.50 543686.72 4244968.57 99 30 90 203 L 16 16 11 2 6 116 2 0 538780.02 4243415.25 538479.41 4243558.92 538401.49 4243536.60 538392.79 4243571.92 538384.17 4243588.95 538348.00 4243632.67 538334.53 4243644.80 538322.27 4243659.37 538304.44 4243691.60 538298.17 4243728.14 538299.82 4243764.73 538296.08 4243783.00 538297.21 4243801.29 538306.79 4243837.91 538319.95 4243891.62 538335.02 4243928.27 538353.15 4243960.66 538375.57 4243990.64 538388.31 4244003.50 538422.37 4244020.12 538436.33 4244032.38 538444.78 4244050.10 538451.93 4244086.10 538451.75 4244122.68 538445.48 4244159.83 538444.17 4244178.11 538447.14 4244196.42 538457.42 4244212.92 538483.51 4244239.87 538490.74 4244256.97 538527.02 4244320.54 538532.42 4244338.25 538523.36 4244449.15 538528.68 4244485.76 538531.55 4244522.96 538539.83 4244576.64 538540.96 4244594.93 538537.81 4244615.65 538537.73 4244633.32 538543.13 4244652.25 538551.59 4244667.53 538565.55 4244681.00 538611.74 4244711.09 538628.16 4244719.10 538646.42 4244724.06 538679.87 4244741.29 538715.78 4244753.04 538751.06 4244769.06 538789.45 4244772.29 538826.60 4244780.39 538844.24 4244788.39 538853.31 4244803.68 538878.78 4244833.06 538909.64 4244880.14 538947.14 4244944.33 538975.68 4244967.63 538991.49 4244976.24 539010.37 4244979.38 539029.24 4244985.56 539043.21 4244997.21 .... etc..... APPENDIX H.--Pre-1983 Hydrographic Attribute Codes MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Rivers and Streams Feature identification Nodes 030 000l River/stream, upper origin 0002 River/stream, upper origin of stream at water body 0003 River/stream, stream junction 0004 River/stream, stream intersection with bank/shore or estuary 0005 River/stream, sink (stream goes underground or channel is not evident) 0006 River/stream, change in stream classification/status 0007 River/stream, point on stream or centerline 0008 River/stream, stream-canal intersection 0009 River/stream, canal-canal intersection 00l0 River/stream, end of canal 00ll River/stream, canal-shoreline intersection 00l2 River/stream, canal over canal 00l3 River/stream, canal over stream 0020 River/stream, stream road intersection 002l River/stream, stream railroad intersection 0022 River/stream, stream trail intersection 0023 River/stream, stream transmission line intersection 0024 River/stream, stream pipeline intersection 0025 River/stream, aqueduct over stream 0026 River/stream, aqueduct over aqueduct 0027 River/stream, stream tunnel intersection 0028 River/stream, stream dam intersection 0029 River/stream, spillway 0030 River/stream, flood gate or gate APPENDIX H.--Pre-1983 Hydrographic Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Rivers and Streams Feature identification Nodes (cont'd.) 030 0031 River/stream, tide gate (cont'd.) 0032 River/stream, falls 0033 River/stream, end of rapids 0034 River/stream, river mile mark 0035 River/stream, tunnel portal 0036 River/stream, end of siphon 0037 River/stream, end of flume 0038 River/stream, end of penstock 0050 River/stream, point on bank/shore+ 005l River/stream, shore/bank dam intersection 0052 River/stream, gaging station 0053 River/stream, pumping station 0054 River/stream, small dam or weir 0055 River/stream, water intake Areas 000 0000 Area outside graph Lines 030 0226 River/stream, penstock 0227 River/stream, irrigation ditch 0228 River/stream, irrigation canal 0229 River/stream, abandoned canal 0230 River/stream, canal on levee 0250 River/stream, right bank, intermittent stream 025l River/stream, left bank, intermittent stream 0252 River/stream, right bank, perennial stream 0253 River/stream, left bank, perennial stream 0254 River/stream, right bank, braided stream 0255 River/stream, left bank, braided stream 0256 River/stream, right bank, unsurveyed stream APPENDIX H.--Pre-1983 Hydrographic Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Rivers and Streams Feature identification Lines (cont'd.) 030 0257 River/stream, left bank, unsurveyed (cont'd.) stream 0258 River/stream, right bank, sand wash 0259 River/stream, left bank, sand wash 0260 River/stream, right bank, submerged stream 026l River/stream, left bank, submerged stream 0270 River/stream, shore of island 027l River/stream, shore of backwater 0272 River/stream, bank along levee 0273 River/stream, apparent shoreline (outer limits of vegetation) 0274 River/stream, shoreline along pier, wharf, or jetty 0280 River/stream, rapids 0293 River/stream, canal centerline extended into lake or pond 0294 River/stream, stream centerline - indefinite location 0295 River/stream, stream centerline extended into marsh or swamp 0296 River/stream, stream centerline extended into river 0297 River/stream, stream centerline extended into lake or pond 0298 River/stream, stream centerline extended underground 0299 River/stream, closing line (water-water) Points 0350 Single-point feature, river/stream, (Degenerate Lines) small island or exposed rock 0352 Single-point feature, river/stream, spillway 0353 Single-point feature, river/stream, flood gate or gate 0354 Single-point feature, river/stream, tide gate APPENDIX H.--Pre-1983 Hydrographic Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Rivers and Streams Feature identification Points 030 0355 Single-point feature, river/stream, (cont'd.) (Degenerate lines) river mile mark (cont'd.) 0356 Single-point feature, river/stream, gaging station 0357 Single-point feature, river/stream, pumping station 0358 Single-point feature, river/stream, water intake Multiple element 030 0000 Feature added by photorevision methods types Parameter Multiple element 03N ---- Elevation of water surface (right types justified) N=l for feet, N=2 for meters, N=6 for feet below datum 03N ---- Water depth (right justified) N=3 for feet, N=4 for meters 035 ---- River mile (right justified) 038 0000 Best estimate of classification and/or position 039 00-- Coincident feature or symbol (enter first two digits of major code for category of coincident feature in blanks, right justified). Water Bodies Feature identification Nodes 040 000l Water body, point on shoreline 0002 Water body, shoreline road intersection 0003 Water body, shoreline railroad intersection 0004 Water body, shoreline transmission line intersection 0005 Water body, shoreline pipeline intersection APPENDIX H.--Pre-1983 Hydrographic Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Water Bodies (cont'd.) Feature identification Areas 000 0000 Area outside graph 040 0l00 Water body, perennial lake or pond 0l0l Water body, perennial salt lake or pond 0l02 Water body, intermittent lake or pond 0l03 Water body, intermittent salt lake or pond 0l04 Water body, dry lake or pond 0l05 Water body, alkali flat 0l06 Water body, reservoir 0l07 Water body, intermittent reservoir 0ll0 Water body, glacier or snow field 0lll Water body, crevasse area 0l20 Water body, salt evaporator 0l22 Water body, fish hatchery 0l23 Water body, area subject to controlled flooding for agriculture 0l24 Water body, industrial water impoundment 0l25 Water body, area to be submerged 0l26 Water body, fish farm or crawfish farm 0l27 Water body, sewage disposal pond 0l28 Water body, large water intake 0l29 Water body, tailings pond 0l30 Water body, wooded lake 0l50 Water body, island 0l99 Water body, area not in water body 0200 Water body, shoreline 020l Water body, indefinite shoreline 0202 Water body, shoreline along wall 0203 Water body, shoreline along wharf, pier, or jetty 0204 Water body, shoreline along dam 0205 Water body, shoreline along causeway 02l0 Water body, edge of glacier or snowfield 02ll Water body, edge of crevasse area 0299 Water body, closure line (water-water) APPENDIX H.--Pre-1983 Hydrographic Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Water Bodies (cont'd.) Feature identification Lines (cont'd.) 040 0300 Single-point feature, water body, spring 030l Single-point feature, water body, nonflowing well 0302 Single-point feature, water body, flowing well 0350 Single-point feature, water body, small island or exposed rock 035l Single-point feature, water body, small perennial pond 0352 Single-point feature, water body, small intermittent pond 0353 Single-point feature, water body, riser or glory hole 0354 Single-point feature, water body, brine or salt well 0355 Single-point feature, water body, sulphur well 0356 Single-point feature, water body, geyser Multiple element 040 0000 Feature added by photorevision method types Parameter Multiple element 04N ---- Water surface elevation (right types justified) N=l for feet, N=2 for meters, N=6 for feet below datum 04N ---- Water depth (right justified) N=3 for feet, N=4 for meters 048 0000 Best estimate of classification and/or position 049 00-- Coincident feature or symbol (enter first two digits of major code for category of coincident feature in blanks, right justified) APPENDIX I.--Pre-1985 Transportation Attribute Codes MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Transportation, Roads Feature identification Nodes l00 000l Road intersection 0002 Road intersection (grade separation, no interchange) 0003 Road intersection (grade separation with interchange) 0004 Road intersection (grade separation, partial interchange) 0005 Road-railroad intersection 0006 Road-railroad intersection (grade separation) 0007 Road-stream intersection (fixed bridge/culvert) 0008 Road-stream intersection (movable bridge) 0009 Road-trail intersection 00l0 Trail-trail intersection 00ll Bridge abutment 00l2 Tunnel portal 00l3 Road-transmission line intersection 00l4 Road-pipeline intersection 00l5 Ferry landing 00l6 Change in road classification/status 00l7 Structure over road 00l8 Ford 00l9 Low water bridge 0020 Toll gate 002l Traffic circle 0022 Cul-de-sac 0023 Gate 0024 Road-canal intersection (where canal is a transportation feature) 0030 Foot or bicycle bridge over road 0050 Point on road 005l End of road/trail 0060 Port of entry 006l U.S. Customs APPENDIX I.--Pre-1985 Transportation Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Transportation, Roads Feature identification Areas 000 0000 Area outside graph (cont'd) Lines l00 N20l Primary route, hard surface (undivided) N202 Primary route, hard surface (divided, 25' or less) N203 Primary route, hard surface (divided, 25' or more) N204 Primary route, hard surface (one-way traffic) N205 Secondary route, hard surface (one-way traffic) N206 Secondary route, hard surface N207 Improved light duty N208 Unimproved dirt N209 Trail N2l0 4-wheel-drive vehicle trail N2ll Urban streets N2l2 Foot trail N2l3 Bridle trail N2l4 Pack trail N2l5 Historical trail N2l6 Bicycle trail N2l7 Primary route, hard surface (interchange road) N2l8 Secondary route, hard surface (interchange road) N2l9 Improved light-duty interchange road N220 Secondary route, divided N222 Road or street, class 3, divided by centerline N223 Road or street, class 3, divided, lanes separated N240 Ferry crossing N24l Road through parking area N250 Perimeter of parking area N293 Road or trail subject to inundation N294 Road or trail on dam APPENDIX I.--Pre-1985 Transportation Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Transportation, Roads Feature identification Lines (cont'd.) 100 N295 Road or trail on bridge (cont'd.) (cont'd.) N296 Road or trail on levee N297 Road or trail tunnel under ground N298 Road or trail tunnel under water N299 Road or trail under construction N=0 for unrestricted access, N=l for limited access, N=2 for toll road, N=3 for privately operated or controlled public access, N=4 for proposed road, N=5 for abandoned road Points 100 030l Roadside or wayside park (degenerate lines) 0302 Rest area 0303 Overlook 0304 Weigh station 0305 Service facility Multiple element l00 0000 Feature added by photorevision methods types Parameter Multiple element l0l 00-- Number of lanes, right justified types l02 0--- Interstate route number, right justified l03 0--- U.S. route number, right justified l04 ---- State route number, right justified l05 ---- Reservation, park, or military route number, right justified l06 ---- County route number, right justified l08 0000 Best estimate of classification and/or position l09 0--- Coincident feature or symbol (enter first two digits of major code for category of coincident feature in blanks, right justified) APPENDIX I.--Pre-1985 Transportation Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Transportation, Feature identification Nodes ll0 000l Railroad intersection Railroads 0002 Railroad intersection (grade separation) 0003 Siding junction 0004 Station 0005 Railroad-road intersection 0006 Railroad-road intersection (grade separation) 0007 Railroad-stream intersection (fixed bridge/culvert) 0008 Railroad-stream intersection (movable bridge) 0009 Railroad-trail intersection 00l0 Bridge abutment 00ll Tunnel portal 00l2 Railroad-transmission line intersection 00l3 Railroad-pipeline intersection 00l4 Ferry landing 0015 Change in railroad classification/ status 00l6 Structure over railroad 00l7 Turntable 00l8 Turntable and roundhouse 00l9 Point within yard 0049 Crossover 0050 Point on railroad 005l End of railroad Areas 000 0000 Area outside graph Lines ll0 N20l Single track standard gage N202 Double track, standard gage N203 3-track, standard gage N204 4-track, standard gage N205 5 or more tracks, standard gage N206 Siding, standard gage N2ll Single track, narrow gage APPENDIX I.--Pre-1985 Transportation Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Transportation, Feature identification Lines (cont'd.) 110 N2l2 Double track, narrow gage Railroads (cont'd.) (cont'd.) N2l3 3-track, narrow gage N2l4 4-track, narrow gage N2l5 5 or more tracks, narrow gage N2l6 Siding, narrow gage N220 Carline or surface rapid transit N22l Elevated rapid transit N230 Industrial or mine railroad N240 Ferry crossing N24l Railroad through yard N250 Perimeter of yard N294 Railroad on pier N295 Railroad on bridge N296 Railroad on levee N297 Railroad tunnel under ground N298 Railroad tunnel underwater N299 Railroad in snowshed N=0 for normal use, N=l for under construction, N=2 for abandoned, N=3 for dismantled Points NONE (degenerate lines) Multiple element ll0 0000 Feature added by photorevision methods types Parameter Multiple element ll8 0000 Best estimate of classification and/or types position ll9 00-- Coincident feature or symbol (enter first two digits of major code for category of coincident feature, right justified). Pipelines, Feature identification Nodes l30 000l Transmission line intersection Transmission Lines 0002 Pipeline intersection 0003 Transmission line - pipeline intersection APPENDIX I.--Pre-1985 Transportation Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Pipelines, Feature identification Nodes (cont'd.) 130 0004 Transmission line - road intersection Transmission Lines (cont'd.) 0005 Pipeline - road intersection 0006 Transmission line - railroad intersection 0007 Pipeline - stream intersection 0008 Transmission line - stream intersection 0009 Pipeline - stream intersection 00l0 Transmission line - telephone/ telegraph line intersection 00ll Pipeline - bank/shore intersection 00l2 Transmission line - telephone/ telegraph line intersection 00l3 Pipeline - telephone/telegraph line intersection 00l4 Pumping station 00l5 Substation 00l6 Steel tower 0020 Change in classification/status 0030 Angle point on transmission line 003l Angle point on pipeline 0032 Point on transmission line 0033 Point on pipeline 0034 End of transmission line 0035 End of pipeline 0036 End of transmission line at power station or substation 0037 End of pipeline at refinery/oil-gas field Areas 000 0000 Area outside graph Lines l30 020l Single- or double-pole powerline 0202 Steel tower powerline 0203 Single- or double-pole powerline extended over water 0204 Steel tower powerline extended over water APPENDIX I.--Pre-1985 Transportation Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Pipelines, Feature identification Lines (cont'd.) 130 0205 Single- or double-pole powerline Transmission Lines (cont'd.) extended into urban area (cont'd.) 0206 Steel tower powerline extended into urban area 02ll Pipeline (under ground) 02l2 Pipeline (above ground) 02l3 Pipeline (under water) 02l4 Pipeline (above water) 02l5 Pipeline, through siphon 02l6 Pipeline, through flume 02l7 Pipeline extended into urban area 022l Telephone or telegraph line Points NONE Multiple element l30 0000 Feature added by photorevision methods types Parameter Multiple element l38 0000 Best estimate of classification and/or types position l39 00-- Coincident feature or symbol (enter first two digits of major code for category of coincident feature, right justified). l39 0l-- Assumed position next to parallel feature or symbol (enter first two digits of major code for category of parallel feature, right justified). APPENDIX J.--Pre-1985 Other Significant Cultural Feature Attribute Codes MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Other Significant Feature identification Node 140 0001 End point of linear manmade feature Cultural Features 0002 Point on linear manmade feature Area 1400100 Large class 1 building 0101 Large class 2 building 0102 Large church 0103 Church complex (convent, retreat, etc.) 0104 Large school 0105 School campus (univ., college, etc.) 0106 Large municipal building 0107 Large court house 0108 Large post office 0109 Large city or town hall 0110 Large hospital 0111 Hospital complex (sanatorium, VA hospital, etc.) 0112 Orphanage 0126 Large cemetery 0127 Large power plant 0128 Large power substation 0129 Large sewage disposal plant 0130 Large waterworks 0131 Trailer park 0132 Stadium 0133 Athletic fields 0134 Shopping center 0135 Zoo 0136 Golf course 0138 Fairground 0139 Rodeo grounds 0140 Corral 0141 Race track 0142 Drag strip 0143 Ski area 0144 Drive-in theater 0145 Marina APPENDIX J.--Pre-1985 Other Significant Cultural Feature Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Other Significant Feature identification Node (cont'd) 1400146 Large boat ramp Cultural Features 0147 Large dam (cont'd.) 0148 Large campground, recreation area, public use area, or access area (other than National or State) 0149 Covered water reservoir 0150 Large fort 0151 Airport or landing strip 0152 Abandoned airport 0153 Prison compound 0164 Urban tint 0165 Unincorporated village (populated) 0166 Locality (no population) 0167 Industrial park 0168 Large spoil bank 0169 Industrial materials storage area 0170 Oil or gas field 0171 Large water tank 0172 Large tank 0173 Refinery or gas plant 0174 Chemical plant 0175 Nuclear plant 0176 Gas storage area (underground) 0177 Kilns 0178 Charcoal ovens 0179 Mine dump (tailings) 0180 Open surface mine or quarry 0182 Land fills 0183 Disturbed areas 0184 Sludge or slurry disposal 0185 Oil sump or sludge pit 0186 Large ruins 0187 Tank farm 0188 Feedlot 0189 Experimental farm 0190 Proving grounds 0191 Firing range 0192 Missile launch complex APPENDIX J.--Pre-1985 Other Significant Cultural Feature Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Other Significant Feature identification Node (cont'd) 1400193 Piles, dolphins, stumps, or snags Cultural Features 0194 Exposed wreckage (cont'd.) 0195 Cable area 0196 Breakwater, pier, wharf 0197 Covered pier or wharf 0199 Area outside manmade feature Lines 1400240 Ski lift 0241 Tram way 0242 Snow shed 0243 Conveyor 0279 Coke oven 0282 Linear strip mine 0291 Boardwalk 0292 Wall 0293 Causeway 0294 Levee 0295 Sea wall 0296 Breakwater, pier, jetty, or wharf Points 1400300 Class 1 building (degenerate lines)0301 Class 2 building 0302 Church 0303 School 0304 Municipal building 0305 Court house 0306 Post office 0307 City or town hall 0308 Power plant 0309 Fort 0310 Power substation 0311 Sewage disposal plant 0312 Pumping station 0313 Hospital 0314 Waterworks 0315 Swimming pool APPENDIX J.--Pre-1985 Other Significant Cultural Feature Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Other Significant Feature identification Points 1400320 Radio facility Cultural Features (degenerate lines)0321 Radio tower (cont'd.) (cont'd)0322 Lookout tower 0323 Windmill 0324 Heliport 0330 Campsite 0331 Picnic site 0332 Grave site 0333 Historical site or marker 0334 Archeological site 0335 Cliff dwelling 0336 Cavern 0337 Boat ramp 0338 Dock/wharf 0339 Fairground 0340 Rodeo grounds 0341 Corral 0350 Quarry or pit (includes gravel, clay, sand, rock, etc.) 0351 Mine tunnel entrance or cave 0352 Mine shaft 0353 Prospect 0354 Burner/stack 0355 Storage bin 0360 Ruins 0361 Pile, dolphin, stump or snag 0362 Exposed wreck 0380 Lock 0381 Spillway 0382 Drydock 0384 Oil or gas well, drill hole, or drilling platform 0385 Small tank 0386 Small water tank APPENDIX J.--Pre-1985 Other Significant Cultural Feature Attribute Codes--continued MAJOR MINOR DATA CATEGORY TYPE OF CODE APPLICATION CODE CODE DESCRIPTION Other Significant Parameter Multiple element 14100-- Under construction (enter year of map) Cultural Features types 14200-- Abandoned or not in use (enter year (cont'd.) of map) 14900-- Coincident feature or symbol (enter major code for category of coincident feature, right justified) APPENDIX K.--Origins of the U.S. Rectangular Surveys _______________________________________________________________ Code Designation Type States Date _______________________________________________________________ 01 First Principal PM OH,IN 1819 02 Second Principal PM IL,IN 1805 03 Third Principal PM IL 1805 04 Fourth Principal PM IL 1815 05 Fifth Principal PM AR,IA,MN,MO,ND,SD 1815 06 Sixth Principal PM CO,KS,NE,SD,WY 1855 07 Black Hills PM SD 1878 08 Boise PM ID 1867 09 Chickasaw PM MS 1833 10 Choctaw PM MS 1821 11 Cimmaron PM OK 1881 12 Copper River PM AK 1905 13 Fairbanks PM AK 1910 14 Gila and Salt RiverPM AZ 1865 15 Humboldt PM CA 1853 16 Huntsville PM AL,MS 1807 17 Indian PM OK 1870 18 Louisiana PM LA 1807 19 Michigan PM MI,OH 1815 20 Principal PM MT 1867 21 Mount Diablo PM CA,NV 1851 22 Navajo PM AZ 1869 23 New Mexico PrincipalPM CO,NM 1855 24 St. Helena PM LA 1819 25 St. Stephens PM AL,MS 1805 26 Salt Lake PM UT 1855 27 San Bernard PM CA 1852 28 Seward PM AK 1911 29 Tallahasee PM FL,AL 1824 30 Uintah PM UT 1875 31 Ute PM CO 1880 32 Washington PM MS 1803 33 Willamette PM OR,WA 1851 34 Wind River PM WY 1875 35 Ohio River Survey SN OH 1785 36 Between the Miamis SN OH 1802 37 Muskingum River SN OH 1800 38 Ohio River Base SN IN 1799 39 First Scioto River SN OH 1799 40 Second Scioto RiverSN OH 1799 41 Third Scioto River SN OH 1799 42 Ellicott's Line* 43 Twelve-Mile Square SN OH 1805 44 Kateel River PM AK 1956 45 Umiat PM AK 1956 46 Fourth Principal PM MN,WI 1831 47 West of the Great MiamiSN OH 1798 48 U.S. Military SurveySN OH 1797 99 Not Public Land Survey* _______________________________________________________________ * Not digitized; included only for compatibility with BLM table. APPENDIX L.--Named Land Grant Codes ARIZONA 001 ARIBACA 009 SAN IGNACIO DE LA CANOA 002 LUIS MARIA BACA FLOAT #3 010 SAN IGNACIO DEL BABOCOMARI 003 LUIS MARIA BACA FLOAT #5 011 SAN JOSE DE SONOITA 004 LOS NOGALES DE ELLAS 012 SAN JUAN DE LAS BOQUILLAS Y 005 MARIA SANTISIMA DEL CARMEN NOGALES 006 RANCHO DE MARTINEZ 013 SAN RAFAEL DE LA ZANJA 007 SABINO OTERO ET AL 014 SAN RAFAEL DEL VALLE 008 SAN BERNARDINO 015 TUMACACORI AND CALABAZAS 016 SAN RAFAEL DEL VALLE - COCHISE CALIFORNIA 001 SAN BUENA VENTURA 034 PUNTA DE LOS REYES--SOBRANTE 002 EL PRIMER CANON 035 LAS BAULINES 003 LA BARRANCA COLORADA 036 SAUCELITO 004 LAS FLORES 037 TOMALES Y BAULINES--PHELPS 005 SAUCOS 038 TOMALES Y BAULINES--GARCIA 006 RIO DE LOS MOLINOS 039 SAN GERONIMO (MARIN) 007 BOSQUEJO 040 CANADA DE HERRERA 008 CAPAY 041 PUNTA DE QUENTIN 009 ARROYO CHICO 042 CORTE DE MADERA DEL PRESIDIO 010 RANCHO DE FARWELL 043 SAN RAFAEL 011 JACINTO 044 SAN PEDRO SANTA MAGARITA Y 012 LLANO SECO LAS GALLINAS 013 AGUAS FRIAS 045 SAN JOSE--PACHECO 014 ESQUON 046 NOVATO 015 FERNANDEZ 047 CORTE MADERA DE NOVATO 016 LARKINS CHILDRENS RANCHO 048 OLOMPALI 017 COLUSA 049 PETALUMA 018 BOGA 050 ROBLAR DE LA MISERIA 019 HONCUT 051 CANADA DE POGOLIMI 020 NEW HELVETIA 052 CANADA DE JONIVE 021 JOHNSON RANCHO 053 MOLINOS 022 JIMENO 054 SOTOYOME 023 YOKAYA 055 TZABACO 024 SANEL 056 RINCON DE MUSALACON 025 GERMAN 057 CASLAMAYOMI 026 MUNIZ 058 GUENOC 027 BODEGA 059 COLLAYOMI 028 ESTERO AMERICANO 060 MALLACOMES OR MORISTUL 029 BLUCHER 061 MALLACOMES Y PLAN D AGUA 030 LAGUNA DE SAN ANTONIO CALIENTE 031 SOULAJULE LANDS 062 SAN MIGUEL--WEST 032 NICASIO LANDS 063 CABEZA DE SANTA ROSA 033 PUNTA DE LOS REYES-RANDALL 064 LLANO DE SANTA ROSA 065 COTATE APPENDIX L.--Named Land Grant Codes--continued CALIFORNIA (CONT.) 066 LOS GUILICOS 110 LOS MEGANOS 067 AGUA CALIENTE (SONOMA) 111 LOS MEDANOS 068 PUEBLO LANDS OF SONOMA 112 MONTE DEL DIABLO 069 LAC 113 LAS JUNTAS 070 S F SOLAND IN SONOMA MISSION 114 CANADA DEL HAMBRE Y LOS BOLSAS 071 SONOMA CITY LOT IN 115 ARROYO DE LAS NUECES Y BOLBONES 072 HUICHICA 116 SAN RAMON--CARPENTIER 073 RINCON DE LOS CARNEROS 117 SAN RAMON--NORRIS 074 ENTRE NAPA 118 SAN RAMON--AMADOR 075 TULUCAY 119 SANTA RITA 076 NAPA 120 LAS POSITAS 077 YAJOME 121 VALLE DE SAN JOSE--SUNOL & 078 CAYMUS BERNAL 079 CARNE HUMANA 122 SAN LORENZO--CASTRO 080 LA JOTA 123 LAGUNA DE LOS PALOS COLORADOS 081 LOCOALLOMI 124 ACALANES 082 CATACULA 125 LA BOCA DE LA CANADA DEL PINOLE 083 LAS PUTAS 126 PINOLE 084 CANADA DE CAPAY 127 SAN PABLO 085 GUESISOSI 128 SAN ANTONIO--V & D PERALTA 086 RIO JESUS MARIA 129 SAN ANTONIO--A M PERALTA 087 RIO DE LOS PUTOS 130 SAN ANTONIO--Y PERALTA 088 LOS PUTOS 131 SAN LEANDRO 089 CHIMILES 132 SAN LORENZO--SOTO 090 TOLENAS 133 ARROYO DE LA ALEMEDA 091 SUISUN 134 POTRERO DE LOS CERRITOS 092 LOS ULPINOS 135 MISSION SAN JOSE 093 SANJON DE LOS MOQUELUMNES 136 AGUA CALIENTE (ALAMEDA & SANTA CLARA) 094 COSUMNES 095 OMOCHUMNES 137 TULARCITOS--HIGUERA 096 DEL PASO 138 MILPITAS--ALVISO 097 SAN JUAN 139 RINCON DE LOS ESTEROS-WHITE 098 RIO DE LOS AMERICANOS 140 RINCON DE LOS ESTEROS-BERREYESA 099 ARROYO SECO 141 RINCON DE LOS ESTEROS-ALVISO 100 CAMPO DE LOS FRANCESES 142 EMBARCADERO DE SANTA CLARA 101 STANISLAUS RIVER 143 ULISTAC 102 RANCHERIA DEL RIO 144 PASTORIA DE LAS BORREGAS ESTANISLAO 145 POSOLMI 103 YOSEMITE & BIG TREE GRANTS 146 RINCON DE SAN FRANCISQUITO 104 LAS MARIPOSAS 147 RINCONADA DEL ARROYO DE 105 ORESTIMBA SAN FRANCISQUITO 106 RANCHO DEL PUERTO 148 PULGAS 107 EL PESCADERO--GRIMES 149 SAN MATEO 108 EL PESCADERO--PICO AND 150 BURI BURI NAGLEE 151 CANADA DE GUADALUPE 109 CANADA DE LOS VAQUEROS VISITACION Y RODEO VIEJO APPENDIX L.--Named Land Grant Codes--continued CALIFORNIA (CONT.) 152 CANADA DE GUADALUPE Y 194 LOS CAPITANCILLOS RODEO VIEJO 195 SAN VICENTE--BERREYESA 153 RINCON DE LAS SALINAS Y 196 LA LAGUNA SECA POTRERO VIEJO 197 CANADA DE SAN FELIPE Y LAS 154 SAN MIGUEL--NOE ANIMAS 155 PUEBLO LANDS OF SAN FRANCISCO 198 SANJON DE SANTA RITA 156 MISSION DOLORES 199 OJO DE AGUA DE LA COCHE 157 MISSION DOLORES 50 VARA LOT IN 200 LAS UVAS DE HARO 201 SHOQUEL AUGMENTATION 158 MISSION DOLORES--BERNAL 202 SAN AUGUSTIN 159 OJO DE AGUA DE FIGUEROA S F 203 ZAYANTA 160 MISSION DOLORES SUERTE IN 204 SAN VICENTE--ESCARRILLA 161 MISSION DOLORES 205 PUNTA DEL ANO NUEVO 162 SAN FRANCISCO 206 AGUA PUERCA Y LAS TRANCAS 163 LAGUNA DE LA MERCED 207 REFUGIO 164 SAN PEDRO--SANCHEZ 208 CANADA DEL RINCON EN EL 165 CORRAL DE TIERRA--PALOMARES RIO SAN LORENZO 166 CORRAL DE TIERRA--VASQUEZ 209 LA CARBONERA 167 FELIZ 210 SANTA CRUZ MISSION 168 CANADA DE RAYMUNDO 211 TRES OJOS DE AGUA 169 MIRAMONTES 212 MESA DE OJO DE AGUA 170 CANADA DE VERDE Y ARROYO 213 POTRERO Y RINCON DE SAN DE LA PURISIMA PADRO DE REGLADO 171 SAN GREGORIO--RODRIGUEZ 214 ARROYO DEL RODEO 172 SAN GREGORIO--CASTRO 215 SHOQUEL 173 EL CORTE DE MADERA 216 APTOS 174 SAN FRANCISQUITO--RODRIGUEZ 217 LAGUNA DE LAS CALABASAS 175 LA PURISIMA CONCEPCION 218 LOS CORRALITOS 176 SAN ANTONIO--MESA 219 SAN ANDRES 177 SANTA CLARA TR NR--ENRIGHT 220 BOLSA DEL PAJARO 178 EL POTRERO DE SANTA CLARA 221 BOLSA DE SAN CAYETANO 179 PUEBLO LANDS OF SAN JOSE 222 VEGA DEL RIO DEL PAJARO 180 PALA 223 SALSIPUEDES 181 CANADA DE PALA 224 LAS ANIMAS 182 LOS HUECOS 225 SOLIS 183 YERBA BUENA 226 SAN FRANCISCO DE LAS LLAGAS 184 SANTA TERESA 227 LA POLKA 185 SAN JUAN BAUTISTA 228 SAN YSIDRO--GILROY 186 LOS COCHES (SANTA CLARA) 229 SAN YSIDRO--ORTEGA 187 QUITO 230 LLANO DEL TEQUISQUITA 188 SANTA CLARA MISSION TR 231 BOLSA DE SAN FELIPE 189 SANTA CLARA COUNTY--BENNETT 232 SAN JOAQUIN (SAN BENITO) 190 SAN ANTONIO OR PESCADERO 233 AUSAYMAS Y SAN FELIPE 191 BUTANO 234 SAN LUIS GONZAGA 192 RINCONADA DE LOS GATOS 235 PANOCHE DE SAN JUAN Y LOS 193 CANADA DE LOS CAPITANCILLOS CARRISALITOS APPENDIX L.--Named Land Grant Codes--continued CALIFORNIA (CONT.) 236 REAL DE LAS AGUILAS 281 MISSION CARMELOCHORRO 237 SANTA ANA Y QUIEN SABE 282 AGUAJIT 238 SAN JUSTO 283 CANADA DE LA SEGUNDA 239 LOMERIAS MUERTAS 284 JAMES MEADOWS TRACT 240 MISSION SAN JUAN BAUTISTA 285 LOS LAURELLES--RANSOM 241 JURISTA 286 EL POTRERO DE SAN CARLOS 242 LAS AROMITAS Y AGUA CALIENTE 287 SAN FRANCISQUITO 243 CANADA DE LA CARPENTERIA 288 EL SUR 244 LOS CARNEROS--LITTLEJOHN 289 LOS LAURELLES--BERONDA 245 BOLSA NUEVA Y MORO COJO 290 CORRAL DE TIERRA--MCCOBB 246 LOS CARNEROS--MCDOUGAL 291 LOS TULARCITOS--GOMEZ 247 SAN JUAN BAUTISTA TR NR 292 PARAJE DE SANCHEZ 248 SAN JUAN BAUTISTA--BREEN 293 SAN VICENTE--MUNRASS 249 LOS VERGELES 294 EX-MISSION SOLEDAD 250 CIENEGA DEL GABILAN 295 MISSION SOLEDAD 251 LA NATIVIDAD 296 LOS COCHES (MONTEREY) 252 BOLSA DE LAS ESCORPINAS 297 ARROYO SECO--TORRE 253 LOS GATOS OR SANTA RITA 298 POSA DE LOS OSITOS 254 BOLSA DEL POTRERO Y MORO COJO 299 SAN LORENZO--SOBERANES 255 RINCON DE LAS SALINAS 300 SAN LORENZO--SANCHEZ 256 MONTEREY CITY 301 LAGUNA DE TACHE 257 LAS SALINAS 302 SAN LORENZO--RANDALL 258 MONTEREY COUNTY--CASTRO 303 SAN BERNABE 259 EL TUCHO 304 SAN BENITO 260 TWO SUERTES 305 SAN LUCAS 261 RINCON DE SANJON 306 SAN BERNARDO--SOBERANES 262 MONTEREY COUNTY--COCKS 307 MILPITAS 263 NACIONAL 308 MISSION SAN ANTONIO 264 SAUSAL 309 SAN MIGUELITO (MONTEREY) 265 EL ALISAL--BERNAL 310 EL PIOJO 266 LLANO DE BUENA VISTA 311 LOS OJITOS 267 EL ALISAL--HARTNELL 312 PLEYTO 268 CIENEGA DE LOS PAICINES 313 MISSION SAN MIGUEL 269 ENCINAL Y BUENA ESPERANZA 314 CHOLAME 270 CHUALAR 315 HUERHUERO 271 ZANJONES 316 SANTA MARGARITA 272 RINCON DE LA PUENTE DEL MONTE 317 ATASCADERO 273 GUADALUPE Y LLANITOS DE LOS 318 ASUNCION CORREOS 319 SANTA YSABEL (SAN LUIS OBISPO) 274 BUENA VISTA 320 PASO DE ROBLES 275 EL TORO 321 PIEDRA BLANCA 276 LAGUNA SECA 322 SAN SIMEON 277 SAUCITO 323 SANTA ROSA--ESTRADA 278 NOCHE BUENA 324 SAN GERONIMO (SAN LUIS OBISPO) 279 PUNTA DE PINOS 325 MORO Y CAYUCOS 280 EL PESCADERO--JACK 326 SAN BERNARDO--CANE APPENDIX L.--Named Land Grant Codes--continued CALIFORNIA (CONT.) 327 SAN LUISITO 371 SANTA RITA--MALO 328 EL CHORRO 372 MISSION LA PURISMA (SANTA 329 POTRERO DE SAN LUIS OBISPO BARBARA) 330 HUERTA DE ROMUALDO 373 MISSION LA PURISMA 331 CANADA DE LOS OSOS Y PECHO Y 374 LOMPOC ISLAY 375 PUNTA DE LA CONCEPCION 332 LAGUNA 376 LA MISSION VIEJA DE LA PURISMA 333 SAN LUIS OBISPO MISSION 377 CANADA DE SALSIPUEDES 334 RANCHITA DE SANTA FE 378 SAN JULIAN 335 SAN MIGUELITO (SAN LUIS OBISPO)379 NUESTRA SENORA DEL REFUGIO 336 PISMO 380 CANADA DEL CORRAL 337 CORRAL DE PIEDRA 381 LOS DOS PUEBLOS 338 SANTA MANUELA 382 LA GOLETA 339 ARROYO GRANDE 383 LAS CIENEGAS 340 HUASNA 384 MISSION SANTA BARBARA 341 CUYAMA--M A DE LA G Y 385 LAS POSITAS Y LA CALERA LATAILLADE 386 PUEBLO LANDS OF SANTA 342 CUYAMA--CESARIO LATAILLADE BARBARA 343 SAN EMIDIO 387 EL RINCON--ARELLANES 344 EL TEJON 388 SANTA ANA 345 CASTAC 389 OJAI 346 LOS ALAMOS Y AGUA CALIENTE 390 CANADA LARGA O VERDE 347 LA LIEBRE 391 CANADA DE SAN MIGUELITO 348 SISQUOC 392 MISSION SAN BUENAVENTURA 349 TEPUSQUET 393 LOT MISSION SAN BUENAVENTURA 350 SUEY 394 SAN MIGUEL-OLIVAS & LORENZANA 351 NIPOMO 395 SANTA PAULA Y SATICOY 352 BOLSA DE CHAMISAL 396 EX-MISSION SAN 353 GUADALUPE BUENAVENTURA LANDS OF 354 PUNTA DE LA LAGUNA 397 SESPE 355 CASMALIA 398 TEMASCAL 356 JESUS MARIA 399 SAN FRANCISCO 357 TODOS SANTOS Y 400 SIMI SAN ANTONIO 401 LAS POSAS 358 LOS ALAMOS 402 SANTA CLARA DEL NORTE 359 TINAQUAIC 403 RIO DE SANTA CLARA 360 LA LAGUNA--GUTIERREZ 404 SANTA CRUZ ISLAND OF 361 LA ZACA 405 SANTA ROSA ISLAND OF 362 CORRAL DE QUATI 406 GUADALASCA 363 CANADA DE LOS PINOS OR 407 CALLEGUAS COLLEGE RANCHO 408 EL CONEJO 364 SAN MARCOS 409 EL ESCORPIO 365 TEQUEPIS 410 EX-MISSION DE SAN FERNANDO 366 LOMAS DE LA PURIFICACION 411 EL ENCINO 367 NOJOQUI 412 MISSION SAN FERNANDO 368 MISSION OF SANTA YNEZ 413 TUJUNGA 369 SAN CARLOS DE JONATA 414 LA CANADA 370 SANTA ROSA--COTA 415 SAN PASCUAL--GARFIAS APPENDIX L.--Named Land Grant Codes--continued CALIFORNIA (CONT.) 416 SAN GABRIEL TR NR--COURTNEY 461 RINCON DE LA BREA 417 SAN GABRIEL TR NR--LEDESMA 462 LA HABRA 418 LAND 1000 VARAS SQ--SEXTON 463 SANTA GERTRUDES--COLIMA 419 PROSPERO TRACT 464 PASO DE BARTOLO--PICO 420 SAN GABRIEL TR NR--WHITE 465 PASO DE BARTOLO--GUIRADO 421 HUERTO DE CUATI 466 SANTA GERTRUDES--MCFARLAND 422 SAN PASCUAL--WILSON & DOWNEY 423 SAN RAFAEL 467 LOS CERRITOS 424 PROVIDENCIA 468 LOS ALIMITOS 425 CAHUENGA 469 LA BOLSA CHICA 426 LOS FELIS 470 SANTA CATALINA ISLAND 427 LOS ANGELES CITY LANDS OF 471 LAS BOLSAS 428 LAS CIENEGAS 472 LOS COYOTES 429 LA BREA 473 SAN JUAN CAJON DE SANTA ANA 430 SAN ANTONIO OR RODEO DE LAS 474 SANTIAGO DE SANTA ANA AGUAS 475 CANON DE SANTA ANA 431 SAN JOSE DE BUENOS AYRES 476 EL RINCON 432 SAN VICENTE Y SANTA MONICA 477 SANTA ANA DEL CHINO 433 TOPANGA MALIBU SEQUIT 478 SANTA ANA DEL CHINO ADDITION 434 BALLONA 479 CUCAMONGA 435 RINCON DE LOS BUEYES 480 MUSCUPIABE 436 CIENEGA O PASO DE LA TIJERA 481 SAN BERNARDINO 437 AGUAJE DE LA CENTINELLA 482 JURUPA--ROUBIDEAU 438 SAUSAL REDONDO 483 JURUPA--STEARNS 439 LOS PALOS VERDES 484 LA SIERRA--SEPULVEDA 440 SAN PEDRO--DOMINGUEZ 485 LA SIERRA--YORBA 441 TAJAUTA 486 EL SOBRANTE DE SAN JACINTO 442 SAN ANTONIO--LUGO 487 SAN JACINTO NUEVO Y POTRERO 443 LA MERCED 488 SAN JACINTO & SAN GORGONIO 444 PORTRERO CHICO TRACT BETWEEN 445 PORTRERO GRANDE 489 SAN JACINTO VIEJO 446 POTRERO DE FELIPE LUGO 490 PAUBA 447 SAN FRANCISCO--DALTON 491 VALLEY O TEMECULA 448 MISSION SAN GABRIEL 492 TEMECULA 449 SAN GABRIEL TR NR--AGUILAR 493 SANTA ROSA--MORINO 450 SAN GABRIEL TR NR--SALES 494 POTREROS SAN JUAN CAPISTRANO 451 SAN GABRIEL TR NR--SIMEON 495 LA LAGUNA--STEARNS 452 SAN GABRIEL TR NR--SEXTON 496 MISSION VIEJO OR LA PAZ 453 SAN GABRIEL TR NR--DOMINGO 497 TRABUCO 454 SANTA ANITA 498 CANADA DE LOS ALISOS 455 AZUSA--DUARTE 499 LOMAS DE SANTIAGO 456 AZUSA--DALTON 500 SAN JOAQUIN (ORANGE) 457 SAN JOSE ADDITION TO 501 NIGUEL 458 SAN JOSE--DALTON ET AL 502 BOCA DE LA PLAYA 459 LOS NOGALES 503 MISSION SAN JUAN 460 LA PUENTE CAPISTRANO 5 TR AT APPENDIX L.--Named Land Grant Codes--continued CALIFORNIA (CONT.) 504 EX-MISSION SAN JUAN 540 ARROYO DE LA LAGUNA CAPISTRANO # TR AT 541 JAMUL 505 SANTA MARGARITA Y LAS FLORES 542 PUEBLO LOT NO 6 506 MONSERATE 543 CAMARITAS IN SAN FRANCISCO 507 PAUMA 545 LAS VIRGENES 508 VALLE DE SAN JOSE--PORTILLA 546 CANADA DE LOS NOGALES 509 SAN JOSE DEL VALLE 547 PASO DE BARTOLO--MCFARLAND 510 SANTA YSABEL (SAN DIEGO) & DOWNEY 511 VALLE DE SAN FELIPA 548 PASO DE BARTOLO--SEPULVEDA 512 CUYAMACA 549 LAS CRUCES 513 CANADA DE SAN VICENTE Y MESA 550 EL SOBRANTE DEL PADRE BARONA 551 CANADA DEL CORTE DE MADERA 514 VALLE DE PAMO OR SANTA MARIA 552 SAN JOSE Y SUR CHIQUITO 515 GUEJITO 553 ONE SUERTE 516 RINCON DEL DIABLO 554 RESSIGHINI 517 LOS VALLECITOS DE SAN MARCOS 556 100 VARA LOT AT SAN PEDRO 518 BUENA VISTA 557 RANCHO AGUAS NIEVES 519 GUAJOME 558 JUAN SILVAS 520 EX-MISSION SAN LUIS REY 4 560 EX-MISSION SAN JOSE TRACTS 561 AUGA JITA 521 AGUA HEDIONDA 562 APTOS 522 LOS ENCENITOS 563 CANAL RANCH 523 SAN DIEGUITO 564 GUADALUPE Y LLANITOS DE 524 SAN BERNARDO--SNOOK LOS CORREOS 525 LOS PENASQUITOS 565 LITTLE TEMECULA 526 SAN DIEGO PUEBLO LANDS OF 566 MISSION LANDS (SAN LUIS OBISPO) 527 SAN DIEGO ISLAND OR PENINSULA 567 MISSION SAN DIEGO DE ACALA 528 LA NACION 568 MISSION SAN RAFAEL 529 OTAY--ESTUDILLO 569 NAVAJO 530 OTAY--DOMINGUEZ 570 PESCADERO 531 JAMACHO 571 POTRERO DE LA CIENAGA 532 MISSION SAN DIEGO 572 POTRERO EL CARISO 533 EX-MISSION SAN DIEGO 3 TR AT 573 POTRERO LOS PINOS --CH PR 574 PUEBLO LANDS OF SAN DIEGO 534 EL CAJON 575 SAN BERNARDINO 535 CANADA DE LOS COCHES-INSIDE 534 576 SAN VINCENTE 536 EL CHAMISAL 577 SANTA GERTRUDES 537 LOS PRIETOS Y NAJALAYEGUA 578 SANTA ROSA 538 CUCA OR EL POTRER 539 BOCA DE SANTA MONICA COLORADO 001 BEAUBIEN AND MIRANDA 007 ZAPATO 002 LUIS MARIA BACA NO. 4 008 DURANGO RESRV 003* LUIS MARIA B. 009* SANGRE DE CRI. 004 MONTROSE RES 010 NOLAN GRANT 005 SANGRE DE CRISTO 011 VIGIL AND SAINT VRAIN 006 TIERRA AMARILLA 012* VIGIL AND SAINT VRAIN NO. 6 *Alternate representations as entered in the land records. APPENDIX L.--Named Land Grant Codes--continued NEW MEXICO 001 AGUA SALADA 068 ELENA GALLEGOS 003 ALAMEDA 069 PUEBLO OF SANTA ANA 004 ALAMITOS 072 JUAN BATISTA VALDEZ 007 CASA COLORADA 074 ESTANCIA 008 ANGOSTURA 076 FELIPE TAFOYA 010 JOSE SUTTON 077 FERNANDO DE TAOS 011 ANTON CHICO 078 FRANCISCO MONTES VIGIL 2012 ANTONIO DE ABEYTA 079 GALISTEO 013 ANTONIO GUTTIEREZ AND JOAQUIN 080 GIJOSA SEDILLO 081 BENJAMIN EDWARDS 014 ANTONIO MARTINEZ 082 GOTERA 015 ANTONIO ORTIZ 087 IGNACIO CHAVEZ 018 PEDRO ARMENDARIS 088 JACONA 021 ARROYO HONDO 090 JOHN SCOLLY 022 ARROYO SECO 091 JUAN DE GABALDON 024 BARTOLOME FERNANDEZ 092 SIERRA MOSCA 025 BARTOLOME SANCHEZ 093 NUESTRA SENORA DE LA LUZ 026 MAXWELL DE LAS LAGUNITAS 027 BELEN 094 LAGUNA PUEBLO 028 BERNABE MONTANO 096 LA MAJADA 029 BERNALLILO 098 LA SALINA 030 BLACK MESA 099 LAS VEGAS 031 BOSQUE DEL APACHE 101 LO DE PADILLA 032 M AND S MONTOYA 102 LOS CERRILLOS 033 BRAZITO 105 LOS FRIJOLES 034 CAJA DEL RIO 107 LOS TRIGOS 035 CANADA DE COCHITI 108 ANTONIO SALAZAR 036 CANADA DE LOS ALAMOS 110 UNA DE GATO 037 ANTONIO SEDILLO 111 MANZANO 041 ANTONIO ARMENTA 113 MESITA DE JUANA LOPEZ 042 CANON DE CARNUE 115 JUAN DE MESTAS 043 CANON DE CHAMA 116 MORA 044 CANON DEL AGUA 118 NICOLAS DURAN DE CHAVEZ 046 BACA LOCATION NUMBER TWO 121 NUESTRA SENORA DEL ROSARIO 047 CANON DE SAN DIEGO SAN FERNANDO 049 NOLAN 124 OJO DEL BORREGO 050 SALVADOR GONZALES 125 OJO CALIENTE 051 GASPAR ORTIZ 126 OJO DE LA CABRA 052 CHILILI 127 OJO DEL ESPIRITU SANTO 056 DONA ANA BEND COLONY 129 OJO DE SAN JOSE 057 MESILLA CIVIL COLONY 130 SAN MATEO SPRINGS 058 SANTO TOMAS DE YTURBIDE 132 ORTIZ MINE 059 REFUGIO COLONY 133 PABLO MONTOYA 060 JUAN JOSE LOBATO 134 PACHECO 061 CRISTOVAL DE LA SERNA 135 PAGUATE PURCHASE 062 CUBERO 136 PAJARITO 063 CUYAMUNGUE PUEBLO 137 PENA BLANCA 064 DABOLOS 138 PETACA APPENDIX L.--Named Land Grant Codes--continued NEW MEXICO (CONT.) 140 PIEDRE LUMBRE 220 SEVILLETA 141 PLAZA BLANCA 221 SITIO DE JUANA LOPEZ 142 PLAZA COLORADA 222 SITIO DE LOS CERRILLOS 143 POLVADERA 223 SOCORRO 144 PRESTON BECK 224 TAJIQUE 145 PUEBLO OF ACOMA 225 TALAYA HILL 146 PUEBLO OF COCHITI 226 TECOLOTE 148 PUEBLO OF ISLETA 227 TEJON 149 PUEBLO OF JEMEZ 228 TIERRA AMARILLA 150 PUEBLO OF NAMBE 229 TOME 152 PECOS PUEBLO 230 TORREON 153 PUEBLO OF PICURIS 231 TOWN OF ABIQUI 154 PUEBLO OF POJOAQUE 232 TOWN OF ALAMEDA 156 PUEBLO OF SANDIA 233 TOWN OF ALBUQUERQUE 157 PUEBLO OF SAN FELIPE 237 TOWN OF ATRISCO 158 PUEBLO OF SAN ILDEFONSO 241 CEBOLLETA 159 PUEBLO OF SAN JUAN 242 SEBASTIAN MARTIN 160 JOSE MANUEL SANCHEZ BACA 243 TOWN OF CHIMITA 162 SANTA CLARA PUEBLO 245 CIENEGUILLA 163 PUEBLO OF SANTO DOMINGO 250 IGNACIO SANCHEZ VERGASA 164 PUEBLO OF TAOS 251 TOWN OF LOS TRAMPAS 165 PUEBLO OF TESUQUE 253 LUIS ARMENTA 166 PUEBLO OF ZIA 257 SANTA ANA 167 PUEBLO OF ZUNI 258 BALTHAZAR BACA 168 RAMON VIGIL 259 TOWN OF TECOLATE 180 RANCHO DEL RIO GRANDE 260 TOWN OF TEJON 181 RANCHO EL RIJO 262 LAS TRUCHAS 189 RIO COLORADO 264 VALLECITO 192 RIO DE TESUQUE 265 BISHOP JOHN LAMY 195 RITO DE LOS 266 AGUA NEGRA 196 SAN ANTONIO DEL RIO 267 JOSE PEREA COLORADO 269 ALEXANDER VALLEY 197 SAN ANTONIO DE LAS HUERTAS 270 ANTONIO CHAVEZ 198 SAN CLEMENTE 271 NERIO ANTONIO MONTOYA 199 SAN CRISTOVAL 272 BACA LOCATION NUMBER ONE 200 SANGRE DE CRISTO 274 JOSE TRUJILLO 202 SAN JOAQUIN DEL NACIEMENTO 275 ANTOINE LEROUX 203 SAN MARCOS PUEBLO 276 ROGUE LOVATO 204 SAN MIGUEL DEL BADO 278 MARQUEZ AND PADILLA 205 SAN PEDRO 279 CEBOLLA 206 SANTA BARBARA 280 JOSE F BACA Y TERRUS 207 SANTA CRUZ 281 JOAQUIN MESTAS 208 SANTO DOMINGO DE CUNDIYO 283 BACA Y PINO 209 SANTE FE 285 PUEBLO OF SANTA CLARA 211 SANTA ROSA DE CUBERO 286 PUEBLOS OF SANTO DOMINGO 213 SANTA TERESA AND SAN FELIPE 216 SANTIAGO RAMIREZ 300 ZIA SANTA ANA AND JEMEZ 218 SAN YSIDRO 301 SERAFIN RAMIREZ 219 SEBASTIAN DE VARGAS 302 PUEBLO OF SANTA ANA APPENDIX L.--Named Land Grant Codes--continued NEW MEXICO (CONT.) 303 ACOMA PURCHASE 307 JUAN OTERO GRANT 304 BEAUBIEN & MIRANDA -- 308 LAS TRAMPAS GRANT MAXWELL 309 SHO 1235 305 ELRANCHITO GRANT 310 SHO 1898 306 EL RITO OTHER STATES 001 CLARK'S MILITARY GRANT 015 H M GOMEZ (FLORIDA) (INDIANA) 002 FRENCH GRANT (OHIO) 016 ANTELM GAY (FLORIDA) 003 FLEMING GRANT (FLORIDA) 017 PABLO ROSETTE (FLORIDA) 004 DELESPINE GRANT (FLORIDA) 018 JOHN LOW (FLORIDA) 005 ARREDONDO GRANT (FLORIDA) 019 JOSEPH WALES (FLORIDA) 006 MOSES E LEVY (FLORIDA) 020 CHARLES SIBBOLD (FLORIDA) 007 GOMEZ (FLORIDA) 021 C E MC HARDY (FLORIDA) 008 HANSON (FLORIDA) 022 JOSEPH GAUNT (FLORIDA) 009 BERNARDO SEGUI (FLORIDA) 023 GEORGE F CLARK (FLORIDA) 010 DOMINGO ACOSTA (FLORIDA) 024 JANE MURRAY (FLORIDA) 011 WILLIAM GARVIN (FLORIDA) 025 JOHN BOLTON (FLORIDA) 012 PETER FOUCHARD (FLORIDA) 026 SAMUEL BETTS (FLORIDA) 013 LUCAS CRAYON (FLORIDA) 027 AMBROSE HULL (FLORIDA) 014 JOHN H MC INTOSH (FLORIDA) 028 GERONIMO ALVAREZ (FLORIDA) 029 DORMAN (OHIO)