Boundaries
Concept Procedure
 
 
 

A boundary is a closed polygon that affects the visibility of the triangles inside it.

When you create boundaries, you specify whether they use arc tessellation and non-destructive breaklines.

Boundary Types

AutoCAD Civil 3D supports the following types of boundaries:

Surface boundaries are defined by selecting existing polygons from the drawing. The surface definition displays the numerical ID and a list of vertices for each boundary.