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| GeoCommunity Mailing List |
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| Subject: | [gislist] average distance between polygons |
| Date: |
03/22/2004 12:15:01 PM |
| From: |
Bryan Keith |
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Hi list,
I posted this question to one of the ArcView lists last week but didn't get
much response. It's really more of a general gis question, but in my
optimism I was hoping for some Avenue code.
There's various ways to calculate the distance between two polygons. To
name a few:
1 - Minimum distance between them (what you get from the (ArcView) Avenue
Distance request).
2 - Maximum distance between them.
3 - Distance between centroids.
But what about a weighted average distance? Weighted, to account for the
area of the polygon (as opposed to the average of 1 and 2 above, for
example).
One way to think of this is to create a grid of points inside each of the
polygons and then calculate the distance from each point in polygon 1 to
each point in polygon 2, and then take the average value in this matrix.
Does this concept have a name? Anyone have any thoughts, ideas, code that
does this?
Bryan
Bryan Keith
GIS Specialist
Geomega, Inc.
Boulder, CO, USA
bryan@geomega.com
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