topic Extract raster DEM values with polygon(s) elevation min, max, mean etc. in 3D Questions https://community.esri.com/t5/3d-questions/extract-raster-dem-values-with-polygon-s-elevation/m-p/220073#M1343 <HTML><HEAD></HEAD><BODY><SPAN>Hello</SPAN><BR /><SPAN>This may have been answered before but I could not find anything to my satisfaction. I appologize if I missed it.</SPAN><BR /><SPAN>I would like to know how to extract the elevation values from a DEM raster particularly min, max and mean using a polygon.</SPAN><BR /><BR /><SPAN>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.</SPAN><BR /><BR /><SPAN>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.</SPAN><BR /><BR /><SPAN>Is this suspicion warranted?</SPAN><BR /><BR /><SPAN>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.</SPAN><BR /><SPAN>Colin</SPAN></BODY></HTML> Tue, 26 Feb 2013 17:23:06 GMT ColinMurray 2013-02-26T17:23:06Z Extract raster DEM values with polygon(s) elevation min, max, mean etc. https://community.esri.com/t5/3d-questions/extract-raster-dem-values-with-polygon-s-elevation/m-p/220073#M1343 <HTML><HEAD></HEAD><BODY><SPAN>Hello</SPAN><BR /><SPAN>This may have been answered before but I could not find anything to my satisfaction. I appologize if I missed it.</SPAN><BR /><SPAN>I would like to know how to extract the elevation values from a DEM raster particularly min, max and mean using a polygon.</SPAN><BR /><BR /><SPAN>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.</SPAN><BR /><BR /><SPAN>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.</SPAN><BR /><BR /><SPAN>Is this suspicion warranted?</SPAN><BR /><BR /><SPAN>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.</SPAN><BR /><SPAN>Colin</SPAN></BODY></HTML> Tue, 26 Feb 2013 17:23:06 GMT https://community.esri.com/t5/3d-questions/extract-raster-dem-values-with-polygon-s-elevation/m-p/220073#M1343 ColinMurray 2013-02-26T17:23:06Z Re: Extract raster DEM values with polygon(s) elevation min, max, mean etc. https://community.esri.com/t5/3d-questions/extract-raster-dem-values-with-polygon-s-elevation/m-p/220074#M1344 <HTML><HEAD></HEAD><BODY><SPAN>Hi Colin,</SPAN><BR /><BR /><SPAN>The Add Surface Information tool in version 10.1 will accept polygons as input.&nbsp; I assume that you are working in a previous version.</SPAN><BR /><BR /><SPAN>Add Surface Information (Online help document)</SPAN><BR /><A href="http://resources.arcgis.com/en/help/main/10.1/index.html#//00q900000016000000">http://resources.arcgis.com/en/help/main/10.1/index.html#//00q900000016000000</A><BR /><BR /><SPAN>I would suggest to use Zonal Statistics to Table to grab the surface information from your DEM for the polygon area.&nbsp; Or you could use the Add Surface Information tool in version 10 or 9.3.1 with input points created using the Create Random Points tool for the extent of your polygon.&nbsp; This will give you a random sample of the Max, Min and Avg. Z value of your DEM within the polygon.</SPAN><BR /><BR /><SPAN>Create Random Points (Online help document) version 10</SPAN><BR /><A href="http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00170000002r000000">http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00170000002r000000</A></BODY></HTML> Wed, 27 Feb 2013 17:06:57 GMT https://community.esri.com/t5/3d-questions/extract-raster-dem-values-with-polygon-s-elevation/m-p/220074#M1344 CarrieDavis 2013-02-27T17:06:57Z