Project point clouds into 2D local coordinate system

[fuji1205]

Hi everyone,

I am working on a project which require projecting a 3D point cloud into a 2D local coordinate system (no raster), is there any ways to realize this?
Also, can I grid the projected 2D point cloud into a certain size of grid? Is it accomplish by octree?

Thanks!
Fuji

[daniel]

Well, if you can transform the cloud so that X and Y matches your 2D local coordinate system, then it's easy to 'flatten' the Z direction (with the 'Edit > Multiply & Scale' tool for instance).

And to achieve this, you can either use the 'Edit > Apply Transformation' tool (with a known transformation matrix, or rotation angle/vector, etc.). Or do it manually. And last you can also use the 'Align' tool with 2D control points (well, 3D control points but all Z = 0).

[fuji1205]

Thank you for your reply! How about gridding the point cloud with fix size, say 1m * 1m?

[daniel]

Oh, that's the Rasterize tool then: https://www.cloudcompare.org/doc/wiki/i ... =Rasterize (you can export the result as a new cloud, not necessarily as a raster)