DTM - removing the trees and buildings


#1

Playing around with DTM and Qgis. Does anyone know how to more effectively remove trees or buildings in a DTM?

I generate DSM and DTM with standard ODM 0.4 settings.

I load the DTM in Qgis but most trees and buildings still show. What else can I try to remove the structures completely and only have the bare earth showing?

image

Related to https://github.com/OpenDroneMap/ODM/issues/513


#2

The easiest would be to import the point cloud as a las dataset in QGIS, classify the points, and then generate the DTM from ground points only where the gaps will be interpolated from the boundary points.

Check out the LAStools plugin.