November 08, 2006

Creating AutoCAD 3D Polylines from GIS Features

My youngest daughter, Evie, turned 3 last week and to celebrate I can talk about 3D things.

How do you create a 3D Line in AutoCAD using the ArcInfo EXPORT TO CAD geoprocessing tool?
In Microstation the default linear element that gets created by the EXPORT TO CAD tool is a complex line string, which for 3D Microstation files is already a 3D element. In AutoCAD there are different types of complex lines; the Polyline, the Lightweight Polyline and the 3D Polyline. The EXPORT to CAD tool by default creates lightweight polylines.
Therefore if you have 3D linear features in ArcGIS and you’d like them to be 3D linear features in AutoCAD you have to override the default behavior of the EXPORT TO CAD tool by including a field in the exported feature classes’ attribute table called [CADType] and then populate that field with the string ‘3D POLYLINE’ for all the linear feature that you want to be created as 3D Polylines in AutoCAD.

For more information on creating CAD data in ArcGIS you can view several linked articles found in the ESRI Knowledge Base.


Anonymous Anonymous said...

I'm researching how to do this but being a 'GIS and not a 'CAD' person struggling - Is there sanyway to do this without ArcInfo?

TY - Sarah

1:59 AM  
Blogger Don Kuehne said...

The EXPORT TO CAD tool in ArcGIS requires an ArcInfo license. You can create CAD data in in ArcGIS also using the ArcView Data Interoperability Extension product.

10:22 AM  
Anonymous Anonymous said...

This solution worked perfectly. Thanks!

10:05 AM  

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