Low Poly Mesh from LIDAR point cloud

[Jutschl]

Hello there,

I've downloaded some LIDAR pointclouds from earth surface for my latest project. Resolution of those scans is 1 point/meter. The total size of those pointclouds is about 3.5/3 km.

Now I need meshes from those pointclouds, to export as .fbx, the parts I do need high res from are about 1.5/0.6 km area in the middle. The rest outside of that only needs lower polys/resolution. (depicted in attacked picture, inside orange needs high resolution mesh, outside lower)

I tried creating meshes using the "Delauney 2.5D (XY)" function. but could only make higher resolution meshes. The fbx would then be 2GB.

Is there a way to create lower resolution triangulation meshes than points in the cloud? E.G.: 200 meter triangle sides or the likes?

Thanks already!

[daniel]

The PoissonRecon plugin will let you choose the 'octree level' at which the mesh is reconstructed (see https://www.cloudcompare.org/doc/wiki/i ... n_(plugin)).

Another option would be to subsample the cloud before creating the mesh?