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| GeoCommunity Mailing List |
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| Mailing List Archives |
| Subject: | GISList: elevation and contour interval determination |
| Date: |
01/20/2003 08:21:58 PM |
| From: |
Zachary Fisk |
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I've processed DEM data to contour for the US at 25 foot intervals by 1x1
degree grids. I'd like to change the interval in some areas of the country,
for instance some 1 mile areas of Texas will only contain one 25' contour
line.
My question is can anyone provide an algorithm for determining best contour
interval for a given area? I'd like to adjust the interval for the two
extremes. I've tried taking the elevation difference and putting it over the
area, and from that get the standard deviation. Almost all my data falls
within that standard deviation. Am I misinterpreting that, or am I off in my
methodology all together?
thanks,
Zachary Fisk-
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