: If your DWF is a 3D model, ensure your export settings are set to "Relative to Ground" or "Absolute" so the building or infrastructure doesn't appear "sunken" into the terrain in Google Earth.
over DWF. If you only have a DWF, you may first need to convert it back to DWG using AutoCAD. AutoCAD Map 3D / Civil 3D dwf to kmz