OOF2: The Manual
Geographic (GeographicQ2T) — Split a quad based on its neighbors.
A quadrilateral has a four neighboring
Elements. If it has two
neighbors of one type (defined by their dominant pixel
category) and two of another, arranged as in Figure 6.81(a), and if the
Element itself is
inhomogeneous, then there's a good chance that dividing it along
the diagonal shown in (b) will improve the homogeneity of the
GeographicQ2T can be fast because it only
examines quads with a high likelyhood of being splittable.
However, it can skip over splittable quads if the
Skeleton is not
already sufficiently refined and one of the neighbors has the
wrong type. TrialAndErrorQ2T is
slower but more thorough.