That does help. Thanks.
A refinement of the question – When the algorithm removes objects from the DSM to make the DTM, does is always fill in terrain where the object was, or will it leave a hole sometimes ? An example: A large pile has trees growing out of the flat top and I want to know the volume of the pile. If the algorithm can identify the trees, will the volume of the pile reflect holes where the trees were removed, or will it assume terrain where the trees were removed? A similar example is a construction site with a lot of cut and fill being done. If the algorithm can successfully identify the earth moving equipment, will it put terrain beneath the removed equipment, or will it leave a hole where the equipment was removed?
I’m probably asking for absolute answers to questions that vary on a case-by-case basis, but that’s why I’m trying to understand what the algorithm will attempt to do and what to expect for its limitations so I’ll know how to answer a client who asks if I can do a job with drone mapping. I’d rather decline a job than accept one I can’t deliver good results.
You’ve already helped, so thanks for your patience. Regards… Bob R.