This study applied remote sensing and geographic information system tools, along with soil spectral data and quantitative and qualitative relief information, to characterize and separate soil classes developed over the Barreiras Group in the region of Porto Grande, state of Amapá, Brazil. After mapping soils at the semi-detailed level, soil samples from individual profiles were characterized using visible and infrared (400-2500 nm) spectroscopy, and the drainage system and relief were analyzed spatially based on aerial photographs and radar imagery. Quantitative relief information was more efficient than qualitative ones to characterize and separate soils, whereas the soil spectral data allowed the characterization of soil profiles individually. The spatial assessment of the drainage system and relief, and the spectral assessment of individual soil profiles are complementary to characterize and separate soils on the landscape.
aerial photography; visible and infrared spectroscopy; soil classification; geomorphology
