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CAD tip CAD tip # 6563:

Question CAD 
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Q - question

Creating an intersection curve of two terrain surfaces.

A - answer When you have two terrain models, or a terrain plus a 3D object (e.g. a DTM touching a building object), you can create an intersection line where both surfaces touch.

The procedure for getting such 3D curve entity - using a volume surface and its zero contour - is described in the first part of the posting "How to to cut surface of a 3D body" (in Czech, and its Google translation) on the blog Civil3D.cz.

Průsečnice povrchů

Civil2009
100% *  CAD 
5.3.2009    7434x  
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applies to: AutoCAD Civil 3D 2009 ·

See also:
Tip 11072:How to make an interference line from 3D Faces?
Tip 10926:Self-intersecting polylines and polylines with duplicate vertices.
Tip 10499:How to fillet edges between two 3D solids?
Tip 10237:Arc bridges (gaps) in line intersections.
Tip 10054:Boolean operations on 2D polylines.


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