Importing contour lines from Autocad

[Cotty]

There are a lot of unsupported Acad objects in that file which are ignored while import:

Have a look at @Geo nice list here:

Import Contours from AutoCAD Civil 3D

Yes. See these Help articles How should I prepare a CAD file for import into SketchUp? http://help.sketchup.com/en/article/38578 Importing 3D DWG or DXF files http://help.sketchup.com/en/article/114366 Reducing DWG or DXF import file size http://help.sketchup.com/en/article/114368 Can I create terrain from imported contour lines? http://help.sketchup.com/en/article/38587 Sandbox From Contours Tool: Creating a sandbox from contour lines http://help.sketchup.com/en/article/95051 How c…