Hi I have been asked to include a z value for polygons which have already been created. Is this possible, and is it possible to add z values when there are no elevation or vertical values in the attribute table?
You can't retro-fit an existing featureclass, but you probably could create a new one and copy the existing 2D geometry over and define how z is to be assigned
beyond this some operations that require a z value simply need a field in the attribute table. You would have to provide values for it but that field can be used for such things as extruding polygons.
Thanks once again for your help Dan. Very helpful!
In case you would be interested in doing some python coding, I have a blog post here that explains how to set Z values: Working with 3D and M-aware geometries in Arcpy
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