Pasture mapping by classification of Landsat TM images: Analysis of the spectral behaviour of the pasture class in a real medium-scale environment: the case of the Piracicaba catchment (12400 km2, Brazil) - Seyler, F; Chaplot, V; Muller, F; Cerri, C E P; Bernoux, M; Ballester, Maria Victoria Ramos; Feller, C; Cerri, Carlos Clemente (International Journal of Remote Sensing, 2002)