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I am working in ArcMap 10 and will have a 3D representation of a zone of transmission. I would like to determine which GPS points fall within this polygon and then export this subset out to a flat file. I have visualized info using 3D analyst but have not queried 3 D as before in the 2D world. Thank you.

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Just a note may be of some benefit: check this which explains how to determine a point is inside a 3D polygon with some code. –  Developer May 10 '12 at 11:39
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