AutoCAD® Civil 3D® 2012 Essentials: Autodesk® Official Training Guide: Essential

Creating Parcels from Objects

One way you can create parcels is to use lines, arcs, and polylines that already exist in your drawing and convert them into parcel segments. This technique is often used when the parcel geometry is especially complex or must be drawn based on other geometry in the drawing. Civil 3D provides a few tools for drawing parcel segments directly, but there are many more drawing and editing commands available within the AutoCAD part of Civil 3D. For this reason, you may find it easier to create the necessary geometry using the AutoCAD drafting commands rather than the Civil 3D commands.

Converting basic AutoCAD entities to parcel segments is relatively simple. You launch the command from the ribbon; select the lines, arcs, ...