1. Department of Geology, Institute of Geosciences and Exact Sciences, São Paulo State University (UNESP), Av. 24A, 1515, Bela Vista, Rio Claro 13506-900, Brazil
2. LAPIG—Image Processing and GIS Laboratory, Institute of Socio-Environmental Studies, Samambaia Campus, Federal University of Goiás, Av. Esperança s/n, Goiânia 74690-900, Brazil