I have two point clouds one is of an area before development, one is after.
I want to isolate the land surface points (A) now under the new buildings and I want to isolate the new buildings (B).
So I see PDAL has a diff function, would this enable me to export A and B as described above?
I would also like to add a +/- of 10cm to the selection, is this possible.
This is not the intent of pdal diff. According to https://www.pdal.io/apps/diff.html:
The command checks for the equivalence of the following items:
- Different schema
- Expected count
- Metadata
- Actual point count
- Byte-by-byte point data
A separate PDAL kernel would be required for what you are looking to do.