topic Scale Topography in Revit Architecture Forum

Scale Topography

Anonymous — Mon, 18 Nov 2019 17:44:07 GMT

Just imported a .dwg topography file and it came in fine but I'm not able to scale it.
Not sure if this is because of the way I imported it or what. Via the research I've done it seems that I should be able to scale it no problem.

I've attached the project file in case anyone want's to have a look at it.
The google maps image is the exact same image I used in SketchUp to create the topography and is the proper scale. Just need the topography map to match.

Re: Scale Topography

ToanDN — Mon, 18 Nov 2019 17:46:20 GMT

You need to link the CAD file in with the correct Units. If you link it in without choosing the units and want to scale it, select the CAD link, edit type and change it there.

Re: Scale Topography

barthbradley — Mon, 18 Nov 2019 17:53:03 GMT

Why not scale it in ACAD?

...or scale the CAD in Revit before creating your Toposurface from it.

Re: Scale Topography

Anonymous — Mon, 18 Nov 2019 18:42:50 GMT

Scale appears to be correct in SketchUp where I created it.
Can't edit type in Revit but I'm guessing that's because I deleted the .dwg layer already and just have the topography in my Revit model?

Re: Scale Topography

Anonymous — Mon, 18 Nov 2019 18:44:19 GMT

No AutoCAD in this office.

Not sure what you mean by scaling the CAD before creating topo.
I created the topo map in SketchUp by pulling in the location from google maps and then exporting that as a .dwg.

Re: Scale Topography

barthbradley — Mon, 18 Nov 2019 18:49:24 GMT

Are you saying that you did not create a Toposurface from a CAD import instance (the SKP to DWG)?

Re: Scale Topography

ToanDN — Mon, 18 Nov 2019 18:50:06 GMT

@Anonymous wrote:

Scale appears to be correct in SketchUp where I created it.
Can't edit type in Revit but I'm guessing that's because I deleted the .dwg layer already and just have the topography in my Revit model?

Yes you need the DWG link to edit type to scale it. Just link it back again but choose the correct units this time. It may be just that.

Re: Scale Topography

Anonymous — Mon, 18 Nov 2019 18:55:10 GMT

No, I did. Perhaps I did it in a strange way?
Insert > Import CAD > Selected .dwg > Massing & Site > Create From Import > Select Import Instance

Re: Scale Topography

Anonymous — Mon, 18 Nov 2019 18:56:06 GMT

That's my guess. Just got a bit ahead of myself it seems.
Gonna try this now.

Re: Scale Topography

ToanDN — Mon, 18 Nov 2019 19:05:48 GMT

Use Link CAD, not Import CAD so that you can just reload the link for future updates, and unload the link if you don't want to see it.

Re: Scale Topography

barthbradley — Mon, 18 Nov 2019 19:20:55 GMT

I just looked at your DWG and RVT files. Your RVT Toposurface matches precisely the extents/size of the DWG's Topo. If the scale is off, it's because it was drawn incorrectly at the source (e.g. Sketchup). I don't see how Import Units or Linking will correct. You would need to either redo it in Sketchup or, if you don't have AutoCAD, manually scale the DWG in Revit prior to creating a Toposurface from it.