Hello
This may have been answered before but I could not find anything to my satisfaction. I appologize if I missed it.
I would like to know how to extract the elevation values from a DEM raster particularly min, max and mean using a polygon.
I know about the Spatial Analyst "Zonal" tool however that does not seem to work for polygon layers where the polygons overlap. So this solution isn't perfect.
I have created a 3D polygon file by using the "Interpolate shape" tool and then "added z information" to get the min, max, and mean values. These tools are found in 3D analyst. However, since the polygons are interpolated I'm suspicious that the added z-values will not match the exact cell values of the raster. I.e. the interpolated polygon may have a maximum value different from the DEM cell values that the polygon covers.
Is this suspicion warranted?
The tool "Add surface information" seems to do the same thing I did in the two steps above but it does not accept polygons as an input.
Colin
