The odm_georeferenced_model.las output from webODM reconstruction of RGB drone images (not lidar) has all zeros in the classification column (even though my input settings set pc-classify = TRUE). The UserData column has non-zero data. I do not know what these UserData represent? They look like they might classification of ground, vegetation, etc?
Sample output in the odm_georeferenced_model.las is pasted below
The --pc-classify tag is influenced by the Simple Morphological Filter that is used to generate the DTM. I think you’ll find with the default settings you’re mostly going to have Unclassified/0 for most of it, unless your dataset has some really dynamic elevation and structure changes.