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| GeoCommunity Mailing List |
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| Subject: | Re: [gislist] Finding Geo graphic center of a Polygon |
| Date: |
03/08/2006 10:40:01 AM |
| From: |
David T. Hughes |
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You can also use it as a field modification in ArcMalp. Right click on the
shape file you want centroids for, open the attribute table, add two fields
(I use X_Ctr and Y_Ctr) as double precision, 16, 2 fields. Then right click
at the top of the X_Ctr field, select "Calculate Values", check the
"Advanced" box, and then go to help and scroll down to the VB script for
computing X coordinate of a polygon center and copy and paste the prelogic
into the advanced box. Finally, put the X_Ctr field = "Output". For the
Y_Ctr field do the same thing but in the prelogic replace the X with Y.
If this description is too general for you, I have a set of instructions I
give students that goes through the process step by step and click by click.
Luck to you.
David T. Hughes, Ph.D.
Associate Professor of Anthropology
Wichita State University
Wichita, KS 67260-0052
-----Original Message-----
From: gislist-bounces@lists.geocomm.com
[mailto:gislist-bounces@lists.geocomm.com] On Behalf Of Dan Soucie
Sent: Wednesday, March 08, 2006 8:55 AM
To: gislist@lists.geocomm.com
Subject: [gislist] Finding Geo graphic center of a Polygon
I need to determine the geo graphic center of a polygon. I am currently
running ArcGIS 9.1. I would welcome any thoughts on this topic. Thank you
in advance.
Dan S.
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