denoise_scene           Filters isolated points from a point cloud
downsample_scene        Reduces the point cloud density
reconstruct_ground      Optimal ground reconstruction for visibility
                        computation
sample_scene            Recenters and subsets a 3D scene for visibility
                        estimates
viewshed3d              *viewshed3d*: tools to compute visibility in 3D
                        point clouds of ecosystems
viewsheds               Computes cumulated viewsheds
visibility              Computes the visibility from a single location
                        in a 3D point cloud
