The key points about a site in Autodesk Civil 3D are as follows:
- Objects in each site collection interact topologically with each other.
- A site can contain alignments, feature lines, grading groups, and parcels.
- An object can occupy only one site at a time.
- Sites can overlap or occupy the same geographic region.
- You can move or copy objects from one site to another
- Where two lines in the same site cross, they both acquire the same elevation. The line last drawn controls the elevation at these split points. This behavior affects feature lines, alignments, and parcel lot lines. Note: Feature line split point elevations can be controlled by changing the feature line style priority. For more information, see About Feature Line Site Properties.