New answers tagged elevation
You do not say if you are in academia? If you are then the obvious place to go would be edina and digimap. If you are not then have a look here for free elevation data. Of cause you could go to OS the national mapping agency of the UK and get a 50m terrain model...
Free of charge i would say: Get either ASTER or SRTM from earthexplorer. Both are available at 1 arc-sec., respectively ~20m vertical rmse.
I encountered the same problem and I solved it by simply setting the "has_z" property to TRUE while creating the polygon geometry: arcpy.Polygon(my_array, my_spat_ref, TRUE). In the code below I update the z value of the vertices of my polygon fc taking the z values of a point fc. import arcpy arcpy.env.workspace = "my_path" point_fc="my_points_fc.shp" ...
Just use the 'Feature To 3D By Attribute (3D Analyst)' tool. http://resources.arcgis.com/en/help/main/10.2/index.html#//00q90000002z000000
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