plyflatten.utils.InvalidPlyCommentsError: Invalid header comments [] for ply file

[markkua]

Hello, I'm trying to generate a DSM out of 3 point clouds.

The point clouds are originally saved as .las. I tried CloudCompare and open3D to convert .las into .ply in both binary and ASCII format. And constantly got errors like:

plyflatten.utils.InvalidPlyCommentsError: Invalid header comments [‘Created by Open3D’] for ply file MY_FILE_NAME

Then I manually remove the unwanted headers from ASCII. But I still have this error:

plyflatten.utils.InvalidPlyCommentsError: Invalid header comments [] for ply file MY_FILE_NAME

Could you please check it out and provide a possible solution.
Thanks in advance!

[ShreimHossein]

Anything updates since this issue?

[mnhrdt]

Can you please upload a small example ply file that triggers this behavior?

[carlodef]

The issue is probably that the ply file header doesn't say which Coordinate Reference System (CRS) is used.

Plyflatten looks in the header comments for a string that contains either "CRS" or "UTM", and fails if it can't find it: https://github.com/centreborelli/plyflatten/blob/master/plyflatten/utils.py#L66