Compared to the standard format used in AutoCAD Land Desktop, project structure within AutoCAD Civil 3D can be customized to suit your requirements.
AutoCAD Civil 3D includes an Import Data From Land Desktop command. This command uses the following dialog box, which enables you to selectively bring objects into new drawings for use in AutoCAD Civil 3D. For more information, see Using the Import Data From Land Desktop Command.
The recommended use of this Import function is to bring individual surfaces, alignments, or pipe runs into new drawings for use in AutoCAD Civil 3D projects.