02119nam a2200337 a 450000100080000000500110000800800410001910000210006024501950008126001250027630000170040152010020041865000130142065000150143365000190144865000240146765000220149165000250151365000090153865000170154765300170156470000300158170000220161170000220163370000200165570000230167570000200169870000200171870000230173870000200176121524822023-03-17       2007    bl uuuu     u00u1 u    #d1 aFARIAS, M. F. R.  aMapeamento de uso e ocupação do solo e detecção dos impactos ambientais utilizando imagens ASTER na bacia hidrográfica do Córrego do Atoleiro - Distrito Federal.h[electronic resource]  aIn: SIMPÓSIO BRASILEIRO DE SENSORIAMENTO REMOTO, 13., 2007, Florianópolis. Anais... Florianópolis: INPE; SELPERc2007  ap. 3861-3868  aABSTRACT - The objective of this paper is to analyze agricultural and urban landscape patterns of the Atoleiro basin, next to the Planaltina city located at Federal District. The methodology used can be divided in three stages: (a) preprocessing, (b) endmembers identification and (c) Spectral Angle Mapper (SAM). The images were acquired with atmosphere correction from AST07 product. The Level 2 surface reflectance data set (AST07) contains surface reflectance for all of the nine VNIR and SWIR bands at 15-m and 30-m resolutions, respectively. Endmembers were detected from three steps: (a) spectral reduction by the Minimum Noise Fraction (MNF) transformation, (b) spatial reduction by the Pixel Purity Index (PPI) and (c) manual identification of the endmembers using the N-dimensional visualizer. The spectral classification was done using the Spectral Angle Mapper (SAM). The scene is classified in seven classes: urban, bared soil, agriculture, grassland, savanna and riparian vegetation.  aLand use  aLandscapes  aRemote sensing  aBacia Hidrográfica  aImpacto Ambiental  aSensoriamento Remoto  aSolo  aUso da Terra  aImagem ASTER1 aCARVALHO JUNIOR, O. A. de1 aMARTINS, E. de S.1 aGUIMARÃES, R. F.1 aGOMES, R. A. T.1 aOLIVEIRA, S. N. de1 aSILVA, A. V. da1 aSILVA, M. R. da1 aOLIVEIRA, O. R. de1 aSILVA, R. de M.