Spatial distribution of global drylands and aridity classification map. Hyper-arid, AI between 0 and 0.03 (dark red); arid, AI between 0.03 and 0.2 (orange); semiarid, AI between 0.2 and 0.5 (yellow); ...

In this work, the global data set of quicklook images, characterized by a ground resolution of 50 m x 50 m, was used, in order to limit the computational burden. For classification purposes several ...