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Using grassGIS I am attempting to produce a DTM (remove buildings and vegetation) from the
las point cloud. Unfortunately the point cloud exported from dronedeploy.com does not distinguish first and last pulses so the method based on GrassGIS v.lidar.egdection does not work.
- I need an alternative method/tool particularly for removing buildings?
- Any recommendations to transform the z-values relative to the drone take-off location to absolute ones (e.g.: sea-level,..)?