Within this context, the general objective of this study is to use a genetic synthesis of the unsupervised neural network ART2 (Adaptative Resonance Theory) to map land use/land cover of a section from northern Mato Grosso State, using images from Terra/ASTER, at the visible, near (VNIR) and middle (SWIR) infrared bands. Furthermore a temporal analysis of ASTER sensor data was done in this region for the years 2002 and 2003 in order to investigate land use/land cover changes.