: Early CAD drawings often existed in a void. Exporting georeferenced files allowed projects to "snap" into their exact global coordinates, ensuring a bridge designed in a CAD program would actually meet the road on the other side of the river.
Note: If you are using standard AutoCAD, you can simply save the file and proceed to step 3 using the "Export to Google Earth" tool or the KML command if available in your toolset. Civil 3D users have a dedicated workflow: export spatial data autocad
Use MAPEXPORT for full attribute support, or convert via QGIS if you have no Map 3D/Civil 3D license. : Early CAD drawings often existed in a void
Here is a breakdown of why this feature is helpful and how to use it: export spatial data autocad