# How to export surface from sketchup to civil 3d

**URL:** <https://forums.sketchup.com/t/how-to-export-surface-from-sketchup-to-civil-3d/66874>\
**Category:** Pro\
**Created:** [April 20, 2018, 9:54am UTC](https://forums.sketchup.com/t/how-to-export-surface-from-sketchup-to-civil-3d/66874 "2018-04-20T09:54:54Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![thuhangnguyen201](https://avatars.discourse-cdn.com/v4/letter/t/b782af/32.png) [@thuhangnguyen201](https://forums.sketchup.com/u/thuhangnguyen201)\
**Post date:** [April 20, 2018, 9:54am UTC](https://forums.sketchup.com/t/how-to-export-surface-from-sketchup-to-civil-3d/66874/1 "2018-04-20T09:54:55Z")

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Hi,  
I’m working for a project that need to extract the finished surface from sketchup and build that surface in civil 3D to make bulk quantity for some landscape area. I try some exporting to 3D autocad file, and also importing \*.skp file to civil 3D. But still can’t create the correct surface. Anyone can help about this?  
Thanks!

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**Author:** ![Anssi](https://sea2.discourse-cdn.com/sketchup/user_avatar/forums.sketchup.com/anssi/32/105_2.png) [@Anssi](https://forums.sketchup.com/u/Anssi)\
**Post date:** [April 20, 2018, 10:52am UTC](https://forums.sketchup.com/t/how-to-export-surface-from-sketchup-to-civil-3d/66874/2 "2018-04-20T10:52:11Z")

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Maybe this Autodesk forum thread gives a hint:

> **[How can I convert this Polyface Mesh into a tin?](https://forums.autodesk.com/t5/civil-3d-forum/how-can-i-convert-this-polyface-mesh-into-a-tin/td-p/6954680)**
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> I have a survey file that seems to have been created in 3ds Max (Don't ask me why).  It has what looks like a surface in it, but is actually a 'Polyface Mesh'.   I followed the suggestion here but it says 'Not a valid object type' when...

Or here:

> **[Creating Surface from 3D Faces in Autodesk Civil 3D | Civil 3D | Autodesk...](https://knowledge.autodesk.com/support/civil-3d/downloads/caas/sfdcarticles/sfdcarticles/Creating-Surface-from-3D-Faces.html)**
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> How to create a surface from TIN triangles displayed as 3D faces using Civil 3D. To create a surface from 3D Faces, create a boundary outlining 3D faces and create surface from it. Run the LINEWORKSHRINKWRAP command and select all 3D Faces...

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**Author:** ![thuhangnguyen201](https://avatars.discourse-cdn.com/v4/letter/t/b782af/32.png) [@thuhangnguyen201](https://forums.sketchup.com/u/thuhangnguyen201)\
**Post date:** [April 23, 2018, 2:03am UTC](https://forums.sketchup.com/t/how-to-export-surface-from-sketchup-to-civil-3d/66874/3 "2018-04-23T02:03:34Z")

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Hi Anssi,  
Before going to this step, I wonder how to extract surface from sketchup to civil 3D. I try 2 different ways:

1. Importing \*.skp file into civil 3D and build the surface directly from 3D face but seem levels are not correct.
2. exporting the file to dwgs and then create surface from 3d face.  
Both 2 method, the level seems to be different and not correct as the design level  
Could you advice me for which of above methods are correct one?  
Thanks.

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**Author:** ![system](https://global.discourse-cdn.com/sketchup/original/3X/f/2/f2a121500b085ed60806607a82720b092d800bb3.png) [@system](https://forums.sketchup.com/u/system)\
**Post date:** [July 23, 2018, 6:03pm UTC](https://forums.sketchup.com/t/how-to-export-surface-from-sketchup-to-civil-3d/66874/4 "2018-07-23T18:03:38Z")

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