Point Cloud Parameters¶

Use this dialog to set up parameters for generating profiles through point clouds.

Where can I find the dialog?¶

In the toolbox, select Line Definition, then Profiles, and Point Cloud Parameters...

Background¶

Point clouds from scanners contain large amounts of data, and it is often impractical or impossible to triangulate all the data in advance.

Gemini Terrain solves this by triangulating only the points relevant for each profile. Triangulation occurs in real time during profile generation, which avoids the performance issues caused by large triangle nets.

Note

Parameters must be entered via the Gemini profile generator, but they are stored in the SFI model.

Selection Criteria for Points¶

Start by specifying criteria for which points should be included in the triangulation. This is done by entering a selection depth, that is, a distance before and after the profile.

Criteria for Triangulation¶

Next, you can enter criteria for the triangulation itself:

Minimum point distance
Maximum length of triangle edge

The point density in the scan provides an indication of which values you should choose.

Profile Generation¶

Once the triangulation parameters are set, you can generate profiles as usual.

Warning

The application layer must not contain triangle net objects. The program will then, according to the defined priority order (described in the layer dialog), use this and not the point cloud.

If you try to generate profiles through point clouds without having entered triangulation parameters, you will receive a message about this.

3D Triangulation¶

If the scan data also contains overhangs (for example, scans of tunnels), you must check 3D Triangulation.

Info

You can read more about triangulation methods in the user documentation.