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Hi guys, this one is not a big deal, but wondering why after running the DTM it still contains a small reference to buildings?

Hi Jeff,

Great question, there are cases where it is difficult for the software to distinguish the ground from features. This could be due by a DSM resolution that is too low, or by the ground simply not visible enough (e.g. dense forest).



When some features were not properly removed, consider doing the following:

1) Generate the DSM at a finer resolution. The more points, the more chances the terrain is going to be detected.

2) Use a vector constraint when extracting the DTM. This constraint can contain points belonging to the ground, helping the software.

3) Use the DEM Editing tool to fix the issues. You can simply select the features to be removed, and use the "Delete and Fill" function.

Thanks for the tips, David. Option number 3 did the trick.