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Forums >> Revit Building >> Technical Support >> Importing (civil) CAD in Revit
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Joined: Wed, Feb 9, 2005
88 Posts
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I have an autocad file 2D, when I import it in Revit (as link or import) something happens, lines are not where they should be or the length or some of the lines change from the cad file to when I import/ link it in revit (a line in CAD 820ft is 1'-6" shorter in Revit). In CAD: two lines on top of each other (edge of walk and property line) in Revit they are almost 11" apart when I import / link the file. I already tried several things, like center to center, origin to origin, moving the cad to 0,0 point, shared coordinaes, purging the files, removing extra layer in CAD, etc. also tried import/linking in revit 2009 2010 and 2011, none of those worked. any ideas,
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Joined: Wed, Oct 8, 2008
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The issue with importing Civil CAD Drawings into Revit is the presence of lines which are "slightly off axis." Revit does not like this, and attempts (without asking) to straighten all slightly angled linework. There appears to be no way to stop this action. Revit will redraw the lines straight, and possibly drag any other connecting lines with it.
The only solution is to delete any lines which are slightly off axis from the CAD background. After importing to Revit, retrace the missing lines with Detail Lines.
This is a bug and another example of AutoDesk not designing a proper interface between Revit and AutoCAD.
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Joined: Tue, May 16, 2006
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samuelfour,
I think you are incorrect. Whenever I import CAD files that are slightly off axis, they import correctly - I just get the "off axis" warning.
I'm not sure what the original poster's problem was. I have seen some CAD files look incorrect on the screen but still printed OK.
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