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| GeoCommunity Mailing List |
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| Subject: | RE: GISList: History of GIS |
| Date: |
02/13/2002 07:37:17 AM |
| From: |
Neil Havermale |
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I attach a footnote for your reference as regards raster or grid methods
used to extend GIS spatial analysis. If your are interested in a test drive
of MapCalc follow the link below for trialware MapCalc Learner
RHS -
The MapCalc Legacy by F.Limp - the entire article may be found at:
http://www.geoplace.com/gw/2001/0601/0601qt.asp
MapCalc has one of the longest and most distinguished histories of any
spatial analysis software product. Its origins are directly connected to one
of the key pioneering projects in raster GIS, dating back to a dissertation
at Yale University from 1977-1982.
Doctoral student C. Dana Tomlin worked with professors Joseph K. Berry
(major advisor) and Kenneth L. Reed to extend the grid analysis module in
Harvard University's SYMAP program. Additional analytic operations and an
interactive user interface were added to SYMAP and made generally available
by Yale University in the public domain as the Map Analysis Package (MAP),
which was coded in unstructured FORTRAN IV for the IBM 360 mainframe
environment and distributed on nine-track tape. Numerous universities,
public agencies and private companies (domestic and foreign) obtained the
code and modified it for use in their computer environments.
In 1982, the MAP source code was obtained by HDR, a Santa Barbara,
Calif.-based consulting firm. At first, it was envisioned that the code
would be translated from FORTRAN to the Pascal language needed in the
project, but the unstructured code required complete re-coding. Reed and
Berry again were actively involved in the code development. In this
capacity, they introduced several new algorithms and modified many others.
In 1986, Reed and Berry formed Spatial Information Systems (SIS) Inc., and
used the basic framework of the software's Pascal version to develop a
commercial version for DOS-based PC environments. This version underwent
several important modifications from 1990-1996 and was distributed and sold
under the name pMAP version 3.1. More than 200 universities and thousands of
individuals acquired special educational licenses for classroom use,
Academic MAP (aMAP), and self-instruction, Tutorial MAP (tMAP).
In fall of 1997, Red Hen Systems Inc. began developing a product called
SoilRx, which it released in late 1998. The software accepts yield and
sample data and then spatially interpolates these values into continuous
maps of crop productivity and soil nutrient, properties, conductivity and
other distributions for a field. The advanced 2-D and 3-D graphics, charting
functions and grid math capabilities enable farmers to visualize and
interact the spatial relationships within and among precision agriculture
data. The software is primarily used to help identify management zones of
similar data characteristics and develop prescription maps that use
variable- rate technology to adjust the amount of chemicals applied
throughout a field.
In spring 1998, Red Hen Systems began purchasing deployments of the pMAP
modules to enhance the spatial analysis capabilities of SoilRx. In April
2000, Red Hen Systems acquired SIS and all rights to the pMAP code. MapCalc
Learner and Academic packages are the educational versions of the software
based on the integration of SoilRx and pMAP technologies. A commercial
version of MapCalc is under development, and a developer's version based on
the MapCalc library of Active X controls is under consideration.
- W. Fredrick Limp
http://www.redhensystems.com/mapcalc
-----Original Message-----
From: Raghavendran [mailto:srg@immcoinc.com\
Sent: Wednesday, January 23, 2002 11:42 PM
To: gislist@geocomm.com
Subject: GISList: History of GIS
Importance: High
Hi Geo Community Members
You can read through the pages of History of GIS at
http://www.gisdevelopment.net/history/index.htm
Hope you enjoy the article.
Let me know about it.
I am interested in answering questions on GIS, Urban Planning, Traffic &
Transportation and Bentley products (MicroStation/J Geographics, Civil
SelectCAD etc.).
Bye
Raags
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