If you are on Subscription, you can login to your Updates page and download Autodesk Shared Reference Point extension to connect coordinates in Revit with Civil3D.
For Revit 2016
For Civil3D 2016:
Autodesk® Shared Reference Point consists of the following features:
- Two individual installations for AutoCAD Civil 3D and Revit
- Export coordinates and elevation from AutoCAD Civil 3D to external .xml file
- Import .xml into Revit based on same known positions and create a ‘Shared Coordinate System’