Profile Extraction-Define Positions
This step defines at which positions the sections will be computed.
Define positions:
with Regular option to define regularly spaced positions along the axis: d efine the step and the range.
with List of values option to define specific positions using a list of distances (or clicked points).
Add them to the project using the Insert button.
Optionally repeat, for instance to define more positions on a segment the axis.
In case of error, remove all positions using the Reset button or singular positions using the red cross in the list.
Notes
When using an alignment, From ... To ... parameters are improved by a list of key stations.