How to project lines and curves to a surface with elevations

[_Hathaway]

Civil3d 2012 - is there a way to project standard autocad lines and curves to an existing surface to the lines and curves end up witht the surface elevations?  This is an odd request and we are trying to help someone out that wants 3d lines exported in a dxf file.  We have a surface and we have the lines...it's just that the linwork is all at 0 elevation.

Thanks in advance.

[sboon · Accepted solution]

It should be possible.  Start by converting all of the lines and arcs to featurelines, and use the option to project the elevations from the surface.  Then export the drawing to ACad.  The straight segments from the FL should become lines, and the curved segments should be polylines.  You may want to explode those again to get everything as simple lines.

Save that drawing as a dxf.

Steve
Please use the Accept as Solution or Kudo buttons when appropriate

[Jay_B · Accepted solution]

If the entities you have are all lines & curves you could also Isolate all the Lines & Arcs, PEDIT "M" (multiple) select all lines & arcs answer "Y" to convert all to polylines.

Then use the Elevations from Surface command found at Modify Tab>Edit Elevations Panel>Elevations From Surface>Select Surface>>Check on "Insert intermediate grade break points" if you want vertices added where the lines & arcs cross the surface triangles>"M" (multiple) select all polylines.

At this point they become 3D polylines without having to generate the Feature Lines.