Figure 3. Crown-segmented point clouds of individual Scots pine trees (A bottom) and an example of classified point clouds representing a Scots pine tree (A top center) with the fitted 3D convex hull enveloping the crown points, viewed from the top (A top left) and side (A top right). The definition for the box dimension for the same Scots pine (B), the slope of the fitted straight line (1.90) equals the box dimension whereas the intercept (-0.27) is a measure of tree size and coefficient of determination (R2=1.0) self-similarity.