remove point cloud tilt

[rsp]

Hi,
I have several pointclouds of short stretches of road surface.
Obviously, the road has crossfall and slope and so have the pointclouds.
What I am interested in are local height deviations, so I would like to rotate the point clouds to remove the tilt and have a more or less level plane.

My idea was:

• to fit a plane to the pointcloud
• subtract the plane

so that I get a level surface.

Plane fitting is easy with
Tools -> Fit -> Plane

There I get a transformation matrix and followed the hint shown (Apply Transformation).
Using "Apply Transformation" - using the inverse matrix and copying the 4x4 matrix was done - but the point cloud did not rotate the way I expected - it stayed more or less the same and the tilt is still visible when I look "from the side".

I am missing something here - is there anybody who could enligthen me?
Thanks in advance!

[daniel]

Can you maybe try with the 'not inversed' matrix? Normally you should get the plane normal to be parallel with Z, so the road shouldn't be tilted anymore...