Fig. 3. The model used to identify forest fragmentation categories from local measurements of Pf and Pff in a fixed-area window. Pf is the proportion of forest and Pff is (roughly, see Methods) the conditional probability that, given a pixel of forest, the neighbor is also forested. The colors shown are also used later to create maps of the indicated fragmentation categories. Note the rectangular exaggeration of the “undetermined” category that is nominally a line segment.