Forums >> General Discussion >> Revit Project Management >> .DWG Import - Lines acting weird

raja15

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Joined: Mon, Feb 21, 2011
84 Posts

Hi there,

I'm currently using Revit 2017 on Windows 10.

Quick question, has anyone had issues when importing a .dwg file into Revit and the lines seem to move all the time in the view?

The best way I can describe it is, for example, when you are in a plan view and you zoom in and out, the lines in the .dwg import move, or change position. (Refer to attached screenshots 1-4)

I have attached some screenshots showing part of one of our surveys for a site, provided to us in .dwg format, and imported into revit.

Screenshot 1 indicates the way revit is showing the line, and the blue dash line is indicating where the line actually is located. Screenshots 2-4 are screenshots of a partial closer zoom. You will notice the change in the way revit shows the .dwg import line, and it's location by the blue dash line.

These .dwg imports we are having issues with are provided to us by our survey consultants. Not sure if the fix is something as simple as the .dwg import contains too much information for revit to generate, and that is why it's behaving like this? Or if there is another solution / answer.

Any thoughts, advice or comments are appreciated.

Thanks in advance.

Attached Images

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WWHub

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Joined: Tue, May 16, 2006
13079 Posts

This question has come up a lot over time.  It is typically a two-fold problem.  The CAD file is often too large an area and or the origin may be a long way away.  The second problem is how your graphics card handles this data.

BTW - The blue line may be snapping orthographically rather than to the cad point.  Use your tab key to change the snaps when doing this.

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raja15

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Joined: Mon, Feb 21, 2011
84 Posts

Is there a general rule of thumb for size of imports where this occurs? This file is 746KB at the moment, however most of that data is contours and RL's which we need in Revit.

I've checked the origin & it's in a relatively normal position, ie it's not, for example, located 5000m away from the actual .dwg data.

Our graphics card is very new and the computer has just recently been upgraded. Not sure if that makes a difference or not.

But thanks for the feedback.

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WWHub

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Joined: Tue, May 16, 2006
13079 Posts

I don't know any rule of thumb.

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