Civil 3D Alignments

Use this skill when creating, modifying, or querying alignments, working with stations, or configuring superelevation.

Alignment Collections

// All alignments (siteless + sited)
ObjectIdCollection allAlignments = doc.GetAlignmentIds();

// Only siteless alignments
ObjectIdCollection sitelessAlignments = doc.GetSitelessAlignmentIds();

Creating Alignments

Empty Alignment (no geometry)