1. Department of Geographical Sciences, University of Maryland, College Park, MD, USA.
2. College of Environmental Science and Forestry, State University of New York, Syracuse, NY, USA.
3. Image Processing and GIS Lab (LAPIG), Federal University of Goiás (UFG), Goiânia, Brazil.
4. Department of Geosciences, Texas Tech University, Lubbock, TX, USA.