I am attempting to generate a new Trainz route, but I have encountered an issue with the DEM data:
When compared against the historical topographic map, you can see that the DEM contains a number of manmade features (in this instance, a depressed highway) that did not exist during the time period I am attempting to depict. This presents a serious impediment to the entire project, as many of these elevated/depressed highways were built upon the abandoned railroad rights-of-way in my Trainz route.
While it is possible to painstakingly remove these manmade features with the terrain tools in Trainz Surveyor, I am curious if TransDEM itself offers any sort of functionality which might aid me in altering/removing them?