Does your project (for example, an airport, campus, or highway project) have its own peculiar geospatial coordinate system instead of a widely used standard one like LL84?
An Autodesk customer conformed its local project coordinate systems across all project users’ computers so that Map 3D, Civil 3D, and InfraWorks users were able to access all relevant data on the project and were able to present their work in any of the project’s coordinate systems.
In AutoCAD Map 3D, you can customize your own coordinate system and it will be reflected in InfraWorks and Civil 3D as well (if you’re running the same version of each app); the applications share the coordinate system dictionary. Alternatively, you can customize your project’s coordinates in InfraWorks: Insert the data at the known location by using the various placement options in the data import dialog — though that may require manual entry of a placement offset. Leave the InfraWorks model’s coordinate system as LL (latitude-longitude); InfraWorks will account for the curvature of the earth, as it does for all models already. For the model itself, a global system like LL84 ensures maximum portability/interoperability of the model with some of our planned future workflows. For data import, reporting, and display, any geospatial coordinate system is fine, including custom ones.
But what if you’re running a different version of each app? Or multiple versions of one or more of these apps? Here’s what to do. Manually copy the coordinate system definitions to the correct folder. The definitions are normally stored in the C:\ProgramData\Autodesk\Geospatial Coordinate Systems folder. If you have multiple versions of Map 3D, Civil 3D, or InfraWorks installed, you will notice multiple folders:
In such a case, you may not see the custom definitions created in Map 3D or Civil 3D in InfraWorks. To remedy that, you can copy and paste (make a backup first!) the definitions from one Geospatial Coordinate Systems folder into another (matching the version of InfraWorks); InfraWorks will then pick up these custom definitions. This approach can also be used to collaborate with other users on other machines as long the contents of the Geospatial Coordinate Systems folder are also copied and pasted on those machines.
Protip: With regard to raster layers, if you are using custom coordinate systems created in Map 3D, you cannot collaborate on that model (in other words, sync to the cloud and download to another machine), since the custom coordinate system cannot be embedded and transferred.