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| GeoCommunity Mailing List |
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| Mailing List Archives |
| Subject: | [gislist] calculate area falling under each classification of
attribute layer |
| Date: |
03/07/2006 10:10:02 AM |
| From: |
Bhupinder Singh |
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I am writing the solution of my second question here. But i am still waitin=
g for answer of my first question. Question was: When we draw a attribute=
layer then how can we calculate area falling under each classification tha=
t we made. Answer is: Creating summary statistics ArcMap includes tools=
for statistical analysis. You=92ll create a table to summarize the number =
of parcels of each land use type within the noise contour and the total are=
a of each type. In the table of contents, right-click the parcels_sel layer=
and click Open Attribute Table. Right-click the LAND_USE field header and =
click Summarize.
QUICK-START TUTORIAL Make sure the field to summarize is LAND_USE. Clic=
k the plus sign next to Shape_Area to expand it. Check Sum to summarize the=
area by land use type. Create the output table in the airport geodatabase =
and name it lu_frequency. Click OK. ArcMap creates a new table with a recor=
d for each land use type showing the number of parcels of that type and the=
total land area (in square feet). Click Yes when prompted to add the resul=
ting table to the map.
Opening a table You may have noticed that when the table is added to the=
map, the table of contents switches from the Display tab to the Source tab=
(at the bottom of the table of contents). The Source tab shows the locatio=
n of all data in the table of contents: this is useful when editing data in=
ArcMap because it shows you which layers are in the same workspace. (When =
you edit in ArcMap, you edit an entire workspace: that is, all the layers i=
n the workspace are available for editing.) The Source tab also lists all t=
ables. Tables don.t show up when the Display tab is selected since a table=
is not a geographic feature that gets displayed on the map. Right-click lu=
_frequency in the table of contents and click Open. You can see the number =
of parcels and the total area (in square feet) of each land use type.
If any one need more help please contact me.
Bhupinder Singh
Er. Bhupinder Singh,
Research Fellow, Department of Soils,
Punjab Agricultural University, =
Ludhiana - 141004, Punjab (INDIA)
Phone (M): +91 98722 19828
Phone (R): +91 1822 220828 =
=
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