CloudCompare forum

Hi,

we need to get information about the amount of snow on Rooftops.
We have laserscans of the buildings with and without snow, but i am unable to get find a solution myself.
I tried using MPlane, but it doesnt work, since it wont let me use the plane from Point Cloud A and then measure the distance to Point Cloud B.
Since the roofs are relatively complex structures, a simple plane comparison between point cloud A and Point Cloud B is not enough.

Can you provide me some tips what i could try? The ideal outcome would be a colored height map of only the snow, so you can see the individual thickness of the snow layer in one picture.

Thank you in advance!

best regards,
Dominik

Are you able to properly register/align the two clouds?

Then you should use either Cloud-2-Cloud or M3C2 distance computation tools (see https://www.cloudcompare.org/doc/wiki/i ... omputation).

Hi,

Thanks for your input!
Aligning the clouds is a bit challenging, because one of the clouds is covered in snow, so to pick the 4 point pairs is difficult. Maybe we need to use ground control points to align them properly?

The automatic aligning function would be nice, but i think there would be problems because of the snow layer. Do you have any tipps on that matter?

best regards, Dominik

Yes, GCPs would be ideal indeed.

And if you really have snow everywhere on the second cloud, then indeed automatic alignment might not give a very reliable result ;)