13. Other Features - VUKOZ-OEL/3d-forest-classic GitHub Wiki

This menu comprises functions that are generally applicable to all cloud types.

Cloud Merge

This function helps to join two point clouds into a new one. It can be called via Other features → Cloud merge. In the dialog window select the clouds to be merged, set the name of the new cloud, select its type (e.g. Tree, Base, etc.), and check the box if you want to delete the input clouds.

Cloud Subtraction

The cloud subtraction is done via Other features → Cloud subtraction. The dialog window offers the option to select the point clouds to be subtracted and set the name of the output cloud. The tool subtracts the smaller cloud from the bigger cloud. Identical points of both clouds are removed from the bigger cloud and the result is saved as a new cloud.

Voxelize Cloud

The reduction of the point cloud density is possible via Other features → Voxelize cloud. The dialog window gives the option to select the cloud of interest, set the name of the voxelized point cloud, and the size of the voxels in cm. The tool generates a voxelized point cloud from the input by centroids of voxels that included at least one point of the original point cloud.

Create Convex or Concave 2D Hull

The convex/concave hull of any cloud can be created via Other features → Create convex hull or Create concave hull. These functions evaluate the convex/concave hull of the orthogonal projection of the cloud into the horizontal plane at the height of the lowest point and save it as a new cloud (type Others). The same algorithms as described in the chapters Convex planar projection and Concave planar projection are used. The tool thus creates a layer with the same extent and boundaries as the area in 3D Forest. This may be further used to transfer areas of interest from the 3D Forest to a GIS. The hull cloud should be exported as .txt if imported into ArcMap for polyline or polygon creation, for more details see chapter Data Export.

Remove Duplicate Points

The redundant points may be removed via Other features → Remove duplicate points. The dialog window enables to select the cloud for filtering. The point cloud is divided into smaller point clouds using octree search (octree resolution is 20 cm) and each cloud is separately voxelized with 1 mm voxel size. After that, the clouds are merged back.

Save into tiff

The current view from the visualization area can be saved via Other features → Save into tiff. Then set the name for the .tiff file and the destination folder.

Change Background-color

The background color of the viewer can be changed via Other features → Change background color. Then select a new color.