LiDAR scan of Mondavi Center visualized at a quality level of -1.5.

Using the 3D paint brush to select a subset of points for feature extraction. The brush is a sphere attached to a (tracked) input device, and selects all points inside the sphere whenever the associated input device button is pressed. Selected points are drawn in green.

Once the desired points are selected, the program is told to calculate the equation of the best-fit plane to the selected set. The plane equations can later be used to calculate other desired quantities.

Extracting multiple planes allows a user to calculate the equation of intersection lines or the positions of intersection points at very high accuracies. For example, if each point in a LiDAR scan has an error interval of +-2mm, then the plane equation best fitting 10,000 points expected to lie in a plane can have an error interval as low as 20 micrometer (assuming that the error is normally distributed).