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A DTM raster can be represented by triangle meshes by finding a set of non-overlapping triangles that covers the entire mesh and approximates the elevation field. There are two different types of triangle meshes that can be used for this purpose: a triangulated regular network (TRN), in which every pixel of the raster is represented by a vertex, and all ...


I am using 10.2 but had no issues clipping your TIN. Your polygon is not a 3D feature so you may have incorrectly set the Height Field parameter which by default is, in this case, set to iD - this will force to clip the TIN at that height which is 0. Set the Height Field to NONE and run it again: The resulting TIN will be clipped as follows:

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