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| GeoCommunity Mailing List |
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| Mailing List Archives |
| Subject: | Re: [gislist] Extract maximum value from a zone |
| Date: |
07/22/2006 11:00:01 PM |
| From: |
Quantitative Decisions |
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At 04:14 PM 7/22/2006 -0700, Sean Grimland wrote:
>I have a dem file and a zone file. I want to find the
>pixel(s) with the highest value in each zone and
>extract to a new file. Zonal statistics isn't of use
>because I don't want though to assign the whole zone
>the maximum value.
Actually, computing a zonal maximum is a good start. Represent the zones
as a grid, too, and join the zonal stats to it. Comparing the resulting
grid of zonal maxes to the original grid will show you which pixels have
values equal to the largest within their zone. Extract the selected pixels.
--Bill Huber
Quantitative Decisions
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