About Sections

You can use sections to examine existing and proposed surface levels sampled across an alignment at defined chainage intervals.

In Autodesk Civil 3D, section data is defined and displayed using sample lines, sections, and section views, all of which are managed through a collection called a sample line group. An alignment can have more than one sample line group associated with it, each having a unique set of sample lines and sections.

Use sections (also referred to as cross sections) to provide a view of the terrain cut at an angle across a linear feature, such as a proposed road.

Typically, sections are cut across horizontal (plan) alignments at a specified chainage interval using specified swath widths. These sections are then plotted, individually for a chainage, or as a group for a range of chainages.

Autodesk Civil 3D handles the creation, management, and plotting of sections with the following components:

Note:

Before creating sections, a surface and one or more horizontal alignments must exist.

Sections Workflow

Sections Tutorials