Fig. S5. Uncertainty from k-fold cross validation. The uncertainty is expressed as the standard deviation of the tree cover predicted from the k potential tree cover layers computed during the k-fold crossvalidation. (A) Summary of the procedure. (B) Uncertainty (standard deviation) vs. mean predicted tree cover at the pixel level. The relationship shows that the level of uncertainty is greater at intermediate tree cover classes, reaching 15% of tree cover variation at 50% of the predicted potential tree cover.