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CAD tip CAD tip # 11074:

Question CAD 
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Q - question

How to convert a 2D polyline to 3D or vice-versa?

A - answer The conversion tools for changing 2D polylines to 3D polylines and for changing 3D polylines to 2D polylines can be found in AutoCAD Civil 3D in the ribbon Modify > Project.

Expand the Project panel with the arrow next to its name and from the expanded menu choose the function "Convert 2D to 3D Polylines" (CONVERTPLINES) or "Convert 3D to 2D Polylines" (CONVERT3DPOLYS).

When converting entities of the type "3D Polyline" to 2D, the vertex Z-coordinate information is lost.

Civil
100% *  CAD 
31.8.2016    3936×  
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applies to: AutoCAD Civil 3D ·

See also:
Tip 11769:How to convert border lines (rails) to a surface?
Tip 11054:Difference volume (3D solid) between two TIN surfaces (sets of coordinates)
Tip 10636:The entity isn't planar to the World Coordinate System and can't be converted.
Tip 10054:Boolean operations on 2D polylines.
Tip 9512:How to convert a point cloud to an editable 3D CAD model (mesh)?


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