Has any body used ITinNodeCollection to generate Voronoi/Thiessen polygons. I have a point featureclass for which I want to create Voronoi/Thiessen polygons.
Does this require 3d analyst license?
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The answer may vary depending on the version of ArcGIS that you are using, but for instance with 10 you need either 3D analyst (for all "TIN" objects ) or an ArcInfo (Advanced) licence (in this case, look for CreateThiessenPolygons) .
The function is also available here http://www.ian-ko.com/
I have posted in github a project in arcobjects to create polygons thiessen using arcview license: https://github.com/nicogis/Voronoi
If you have Spatial Analyst but not 3D analyst, we (a university team) created an ArcGIS 10.0 addin that computes regular and weighted Voronoi polygons using a raster methodolgy. The addin itself is free and the code is open source.