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Import/Export to other CAD/BIM formats (DWG/DXF, IFC, SketchUp, 3DS etc.), spreadsheets, databases etc.

Moderators: Karl Ottenstein, LaszloNagy, ejrolon, Barry Kelly, gkmethy

I have to get 3-d polyline terrain data into an archicad22-project (cant attach a dwg here... ). I dont want to use the points-to-.txt-method if possible, because of the amount of data. Also redrawing is too much work.
It should be possible to export the data as an IFC Site, but i dont know how to define the polygons as IFC-Site in autocad Map 3d 2018. I also got access to revit, but no experience.
Help would be much appreciated!
If you have ArchiTerra, you can convert your dwg into a dxf and ArchiTerra can build a mesh for you from that. Pretty sure it reads 3d polylines.