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Errors Calculating the Aspect of Multiple Polygons

LitwosLitwos Global Mapper UserPosts: 2
edited January 2015 in Elevation Data
Hi!
I am trying to get the correct values of the mean aspect of a couple polygons (over 1000 KMZ), from ASTERv2 DEM. I use the automatic calculation from the Analysis/Measurement > Calculate Elevation/Slope Stats, however, this does not calculate for all my polygons... Why is this?
Also, if you could explain me the algorythm used by GMapper for calculating the mean aspect of a polygon, will be greatly appreciated, as I get different values from other software, ex: SAGA.

Thank you very much for your help! :)
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