Building a Terrain and a TIN out of the same point shapefile produces two maps that look extremely similar, but when I run the results through the Surface Volume the Terrain and TIN give slightly different volume results. The volume of the Terrain also changes depending on whether Z Tolerance or Window Size is used as a pyramiding method even though the Surface Volume tool is analyzing the full resolution Terrain data. Is there a specific set of parameters that will produce a Terrain that gives identical volume results to a TIN or are the two methods inherently different in some way?
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