The architecture of the neural network ART2 inserted in the environment SGRNA, presents characteristics (such as simplicity and easiness to enter and manipulate data) of an adequate ASTER image classifier. Besides that, the classification performance obtained by the neural network, as related to the ground truth, can be considered as satisfactory, taking into account the investigated thematic classes. The vigilance parameter is an important variable in the classification process done by neural network ART2, because it helps to control the number of patterns to be classified and that this number is not too large (e.g. for the case of values very close to 1). The training values, test and the population data vary according to the size of the area and of computational resources available, because for larger values there is an increased demand of computer capacity.