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Can anyone point me to a clear document or algorithm for extracting smooth isolines from a Triangular Irregular Network? I've seen some examples using the jagged linear methods, but can't seem to find good documentation on how to do the process using a smoother method like Natural Neighbor / Radial Basis / Quadric / etc...

Thanks!

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up vote 2 down vote accepted

Digital elevation models and TIN algorithms (M. van Kreveld), section 1.6 may help.

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