Abstract - The Antonio river sub-basin is part of the Contas’ river basin. It is located in the southern center of the state of Bahia, between the geographic coordinates 14º0''''''''0 '''''''''''''''' at 14º56''''''''0 "S and 41º28''''''''0" ''''''''at 42º48''''''''0''''''''W, in the physiographic region of the semi-arid region. This study aims to characterize the land use in the sub-basin of the Antonio River by applying geoprocessing techniques. The following steps were hold in this study: fieldwork, cartographic base selection, digital processing of orbital images and slope map generation. Furthermore, five levels were obtained during the land use and cover: non - agricultural anthropic areas (14.59 km ² area, 0.2%), areas with natural vegetation (2420.86 km ², 37.2%), pasture (4062.13 km², 62%), water - dams or dam lakes (4.15 km², 0.06%) and other areas (0.54%). The areas where there is the most concentrated presence of natural vegetation are the areas with the highest slope gradient (above 20%) and the fewer impacts generated by anthropic use. The occupation of man, especially in the urban areas, is found in the areas of declivity classes with a lower gradient (below 3%). Keywords: Sub-basin, land use, geoprocessing, Antônio River, orbital image, slope, Sub-bacia, uso da terra, geoprocessamento, rio do Antônio, imagem orbital, declividade.