Surface mesh from point cloud in Meshlab

Question

I have a point cloud of a terrain, and want to generate a surface mesh. Is this possible to do in Meshlab?

The point cloud is an xyz file that I generated from a raster file of a Digital Elevation Model. Each point in the point cloud is on an evenly spaced grid in the x and y axis, and at the desired elevation in the z-axis. There are around 1 million points.

I can open the xyz file in Meshlab and it looks correct, but I haven't figured out how to generate the surface mesh.

This question is similar or identical to Mesh from point clouds in Mehlab . However, the answer given to this question doesn't work for me.

Answer 1

您可以尝试使用 Remeshing->Surface Reconstruction: Ball Pivoting。

Answer 2

to get good results with Screened Poisson or other methods. First, calculate the normals then use one of the following methods from filter -> Remeshing, simplification and Reconstruction-> 1-Screened Poisson 2-Ball pivoting 3-alpha complex 4-marching cube

if you used Screened Poisson the faces may be longer than the actual mesh so you can remove them by filter -> selection -> Select Faces with edges longer than... then select and apply the edge threshold

hope this answers your question

Best, MD