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How to convert 3d dxf contour map to nurbs surface

Question asked by John Layne on Oct 17, 2009
Latest reply on Nov 6, 2009 by Kevin Quigley
A friend wants to convert a 3d dxf contour map (of the local geography) to a NURBS surface so he can make so rapid prototype models. I've tried bringing the data into SolidWorks 2008, but it brings SolidWorks to a grinding halt.

Any suggestions on what software could do this?