AutoCAD Map 3D General Discussion

AutoCAD Map 3D General Discussion

New Member
Posts: 1
Registered: ‎06-13-2012
Message 1 of 3 (1,137 Views)

DWG to arcgis questions

1137 Views, 2 Replies
06-14-2012 08:42 AM

I am trying to import DWG files over to ArcMap, but none of the data show up on display.  To preface this, I did not create these DWG, and these files were not given a projection and coordinate system.  And I work on AutoCAD Map 3D 2011.  So I have a couple of questions about this:


  1.  Every time I add the associated DWG files, I get a message saying “The following data sources you added are missing spatial reference information.  This data can be drawn in ArcMap, but cannot be projected.”  Do I need to define a projection and coordinate system of the DWG on AutoCAD in order for it to show up on ArcMap? And if so, what are some tips on how to make this happen?
  2. I am working with ArcGIS 9.3.1 and I thought I installed the Data Interoperability extension for so I can bring DWGs to ArcGIS.  However, the extension does not show up on as far as when I try to add it onto ArcCatalog.  Would this also be a factor?
*Expert Elite*
Posts: 1,746
Registered: ‎06-03-2011
Message 2 of 3 (1,130 Views)

Re: DWG to arcgis questions

06-14-2012 11:32 AM in reply to: mdkaller

Well, I think you'd better find answers in an Esri forum, not here, sir.

Anyway, try to _MAPEXPORT from Autocad in .SHP format, then import the resulting shapefiles in Arcgis.

Posts: 20
Registered: ‎07-25-2011
Message 3 of 3 (1,105 Views)

Re: DWG to arcgis questions

06-19-2012 02:53 AM in reply to: antoniovinci

To add a DWG to ArcMap you use the button with the + sign. A extension is not necessary.

What coordinate system has the dwg data? In what coordinate system is the ArcMap data frame?
If the coordinate systems are equal, it is not necessary to assign a coordinate system to the dwg.



Post to the Community

Have questions about Autodesk products? Ask the community.

New Post
Are You Going To Be @ AU 2014? Feel free to drop by our AU topic post and share your plans, plug a class that you're teaching, or simply check out who else from the community might be in attendance. Ohh and don't forgot to stop by the Autodesk Help | Learn | Collaborate booths in the Exhibit Hall and meet our community team if you get a chance!