I need to delete an area of a terrain and replace it with some revised topo. The Edit Model command returns a message: "Ambiguous Command." What causes that? How can I delete triangles in the revised area?
I created the terrain using points and breaklines placed by TopoDOT. I notice that, as I reach a certain limit, the terrain becomes un-linked. From the way it behaves at that point, I assume that deleting the points does not update the terrain. The triangles (contours, etc) remain after I delete the outdated points where grading has taken place on the site.