Orbital images of the Landsat series have been systematically employed in the mapping of land cover and use. However, some areas, due to the relief characteristics or the strong antropic influence, impose difficulties in this characterization. The Uruburetama massif, in the state of Ceará, represents an area with such peculiarities. This work compares images of the OLI / Landsat-8 and MSI / Sentinel-2 orbital s...