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Calculating Z Values

September 09 2009 | 2 comments
Categories: 3D Mapping

How can I calculate the Z values for a point shapefile using a DEM. I do not have the Geostatistical Analyst extension, I do have the Spatial Analyst extension, if this helps.

Mapping Center Answer:

You'll need the 3D Analyst extension.  The tool that does what you need is called Interpolate Shape.

I cannot think of a way to do this (aside from manually entering the values in the editor) without 3D Analyst.  Though, you could write a Python script that got the X,Y for each point, queried your DEM and then set the Z.

Extract Z value using Spatial Analyst posted by Michael Barker on Sep 9 2009 11:36PM
From the Toolbox go to Spatial Analyst Tools>>Extraction>>Extract Values to Points. Choose the Input Point file and the Input DEM. Choose your output file. Once run the DEM 'Z' value is appended at the end of the "new" point file. A couple of other options can be ticked the toolbox help describes these.
... Learn something new every day posted by MappingCenter Team on Sep 10 2009 8:52AM
Thanks Michael.

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