About Exchanging Files Between AutoCAD Civil 3D and Autodesk InfraWorks

You can use the Import IMX and Export IMX commands to exchange files between AutoCAD Civil 3D and Autodesk InfraWorks.

Importing Data from Autodesk InfraWorks

You can import Autodesk InfraWorks terrain, coverage area, water area, pipe, and road data into AutoCAD Civil 3D.

• Terrain surfaces that represent existing ground, transportation, and proposed ground are imported into AutoCAD Civil 3D as TIN surfaces (AIM Existing Ground, AIM Existing Transportation, and AIM Proposed Ground).
• Coverage areas and water areas are imported into AutoCAD Civil 3D as TIN surfaces and as 3D polylines.
• Pipes and pipe connectors are imported into AutoCAD Civil 3D as pipes and structures.
• Road centerlines are imported into AutoCAD Civil 3D as alignments.
  Note: Civil roads are imported into AutoCAD Civil 3D as alignments and profiles.

Styles are created in AutoCAD Civil 3D for the imported objects.

If you import an IMX file into an AutoCAD Civil 3D drawing which has no coordinate system set, then the coordinate system is set in the drawing to match the coordinate system in the IMX file. If you import an IMX file which has a different coordinate system than the drawing, the IMX file data is transformed to the drawing's coordinate system.

Exporting Data from Autodesk InfraWorks

You can export surfaces, pipe networks, alignments, profiles, and corridors from AutoCAD Civil 3D to Autodesk InfraWorks.

• Surfaces (including corridor surfaces) are exported to the IMX file as terrain surfaces.
• Pipes and structures are exported to the IMX file as pipes and pipe connectors.
• Corridors are exported to the IMX file as road centerlines and coverage areas. The centerline alignment and profile in the corridor are exported. Assemblies and subassemblies are not exported.
• Alignments and profiles (which are not part of a corridor) are exported to the IMX file as road centerlines.