Applies to:
Civil 3D
Issue:
Feature lines added as breaklines to a surface have no impact—elevations and slopes remain unchanged.
Causes:
The feature line may not have elevations assigned, or it was added with the “Non-destructive” option. If the breakline supplementing distance is too large or the line is not in the correct site, it won’t affect the triangulation.
Solution:
1 – Select the feature line and use Elevation Editor to verify it has elevation data
2 – Remove and re-add it to the surface using Add Breaklines
3 – Ensure the “Non-destructive breakline” box is unchecked when adding
4 – Adjust the mid-ordinate distance to improve accuracy
5 – Confirm the feature line is in the same site as other geometry affecting the surface
