Get+write wkt-projection-epsg and time-shift (to GPS Time) from/to pointlcoud

[mariolino007]

Hi Thomas is there a possibility of reading and assigning the wkt projection and timeshift (of GPS Time) to a point cloud? Thanks Mario

[tmontaigu]

CloudCompare's point clouds have no concept of projection and coordinate system, and so as far as I'm aware there is no way to add this kind of information to a point cloud so that if the save format supports it is saved

As for timeshift of GPS Time do you mean the shift that cloudcompare applies internally or something else ?

[mariolino007]

loading LAS file with WKT this are the data

[tmontaigu]

This is a metadata attached to the point cloud https://tmontaigu.github.io/CloudCompare-PythonRuntime/python/pycc/data_structures.html#pycc.ccObject

You can use getMetaData or SetMetadata, with the key LAS.projection

print(cloud.getMetaData("LAS.projection"))

[mariolino007]

https://github.com/CloudCompare/CloudCompare/blob/d78f8526f5f17b4d34d4a93781850f6ca6f26f7c/plugins/core/IO/qLASIO/include/LasMetadata.h#L44

https://github.com/CloudCompare/CloudCompare/blob/d78f8526f5f17b4d34d4a93781850f6ca6f26f7c/plugins/core/IO/qLASIO/src/LasMetadata.cpp#L92

its working !!!!

Thnaks !!!!