The Model > Add vertices on DTM intersections

Example:

The line to integrate is the red segment. The ground (DTM) is the green section.
If no vertice is created at the DTM intersection, no point is added on the segment. It will create mound and bank.
When the DTM will be updated and the sources deployed, the DTM will be altered and have the altitude of the source line.
If we add vertices on the DTM, the altitudes of the line follow the DTM. A new point (vertex) is created on each intersection with the DTM, so on each slope variation.

The line to integrate is the red segment.

The ground (DTM) is the green section.

Modele_IntersectDTM_Schema1

If no vertice is created at the DTM intersection, no point is added on the segment.

It will create mound and bank.

Modele_IntersectDTM_Schema2

When the DTM will be updated and the sources deployed, the DTM will be altered and have the altitude of the source line.

Modele_IntersectDTM_Schema3

If we add vertices on the DTM, the altitudes of the line follow the DTM. A new point (vertex) is created on each intersection with the DTM, so on each slope variation.

Modele_IntersectDTM_Schema4

If the user has 2D data for road, we recommend to use the option Add vertices on DTM intersections (to be as close as possible with the ground).

If the user has precise 3D data, we don't recommend to use this option.