Adding Z values to an existing polygon

[janehansen]

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?

Thank

Jane

[DanPatterson_Retired · Accepted solution]

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

http://pro.arcgis.com/en/pro-app/help/editing/create-polygon-features.htm

http://pro.arcgis.com/en/pro-app/help/editing/specify-an-elevation-for-3d-features.htm

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.

[janehansen]

Thanks once again for your help Dan. Very helpful!

Jane

[XanderBakker]

In case you would be interested in doing some python coding, I have a blog post here that explains how to set Z values: https://community.esri.com/people/xander_bakker/blog/2016/07/08/working-with-3d-and-m-aware-geometri...