Vegetation detection

The vegetation detection will identify points which have vegetal structure (having normals highly dispersed) and will classify them to class 3, which is the standard class for low vegetation.

Different settings are available for this function:

• Variation per cell (in percentage): Percentage of variation between the normal of a point and that of the mean plane in the tile used by the algorithm.

• Minimum cell size (in distance units): Minimal size of tiles used in this algorithm. This value determines the precision of the detection. The smaller the value, the more precise the ground will be, but the longer the process will take. The minimal size of the cell should be smaller than the size of a project cell, or else the size of the project cell will be used. The information about the project’s cell size can be found in the menu “File / Project info”.

• Starting point: Point where the algorithm will begin its process. It can be manually set or picked in the point cloud with the “Pick” button. Ideally a vegetation point is selected in order to minimise processing time.  If “Limit by radius” is used, the detection will be centered around this point.

• Limit by radius (in distance units): Limits the zone to be processed around the starting point. This option is useful when trying the best combination of parameters in a project or for small areas which are distinct from the rest of the project.