... al., 198 7; Peddle, 199 5a), and neural networks (Benediktsson et al., 199 0; Car-penter et al., 199 7, 199 9; Trichon et al., 199 9; Jensen et al., 199 9), have beendeveloped or modified for remote sensing ... calibration/validation issues for specific sensors(Yang and Vidal, 199 0; Richter, 199 0; Muller, 199 3; Kennedy et al., 199 7) andplatforms (Ouaidrari and Vermote, 199 9; Edirisinghe et al., 199 9).There are three ... use of DEM data (Fleming and Hoffer, 197 9; Hutchinson, 198 2)and forest inventory data (Ekstrand, 199 4b; Franklin and Raske, 199 4; Wulder, 199 7)in image transformations and in classifications. The...