Discrimination And Biophysical Characterization Of Brazilian Cerrado Physiognomies With Eo-1 Hyperspectral Hyperion
作者： Edson E. Sano , Laerte G. Ferreira , Tomoaki Miura , Alfredo R. Huete
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摘要: The Brazilian savanna, locally known as "cerrado", is the most intensely stressed biome with both natural- and human-induced pressures. In this study, we aimed to improve discrimination characterization of cerrado physiognomies using hyperspectral Hyperion imagery, first space-borne imaging spectrometer onboard NASA's Earth Observing-1 (EO-1) platform. A image was acquired over Brasilia National Park (BNP) on July 20, 2001. Various optical measures which took a full advantage remote sensing were employed applied atmospherically-corrected data. These included 1st-order derivative-based green vegetation index (1st-DGVI), ligno-cellulose absorption index, spectral albedo, shortwave-infrared (SWIR) unmixing. All these correlated well field-estimates landscape component cover fractions. Especially, SWIR unmixing results simultaneously biophysically-characterized discriminated physiognomies. preliminary analyses showed great potential in characterizing/discriminating land covers cerrado.
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