The map2d.dwt template contains the optimal display settings, tools, and views for 2D maps, while the map3d.dwt template is optimized for 3D maps. You can also create your own templates. For information on this, see the AutoCAD Help topic called “Use a Template File to Start a Drawing.”
For many geospatial formats, such as Oracle and ArcSDE, you can connect to the source to add data using Data Access Technology. You access data live, in its native format. You can extend your data access capabilities by adding an open source or third-party .
You can also convert data from most of these formats to DWG format. To do this, you import the data (rather than connect to it). However, this method adds only a snapshot of the data and your changes do not update the data at its source.
Export Civil 3D feature data, such as parcels and alignments, in SDF format. Connect to the resulting SDF file in AutoCAD Map 3D. You can also save surfaces as DEMs in Civil 3D and connect to the resulting DEM files in AutoCAD Map 3D. You can also bring in LandXML files using the Survey feature.
Geospatial data that you add to your map is automatically organized into display layers by feature class. You can also add drawing data to layers. Layers give you control over draw order (Z-order), styling, and more.