CloudCompare forum

I have two point clouds, both with reflective GCPs. The reference cloud has global coordinates, but the other one’s in local coordinates and needs to be aligned to it. Normally, I’d just use the point-picking tool to line the entire clouds up, but these files are huge, so that’s not really practical.

Instead, I split out the GCPs by intensity, aligned the GCPs in the local one to the GCPs in the reference, and now I have the transformation matrix. I want to apply this to the full point cloud to get it into the same coordinate system as the reference. I know I can use “Apply Transformation” to align the full cloud, but it doesn’t assign the reference’s coordinate system metadata.

What’s the best way to go about this?

I don't see any smart/clean way to do it sadly... You should be able to copy the Global Shift & Scale information maybe? (you can copy/paste it from 'Edit > Edit global shift and scale').

Thanks for the reply, Daniel!