MAPEAMENTO DO DESMATAMENTO EM SÃO FÉLIX DO XINGÚ UTILIZANDO COMPOSIÇÃO COLORIDA MULTITEMPORAL DE IMAGENS FRAÇÕES SOMBRA

Abstract

The aim of this work consists of mapping deforestation in São Félix do Xingú, Southern Pará (Brazilian Amazon) using Landsat TM images. Three fraction images representing proportion of bare soil, vegetation, and shade were estimated from the Liner Spectral Mixture Model (LSMM). We choose in this study the shade fraction to discriminate cleared areas because it is well correlated with forest structure. While undis- turbed tropical forests usually have medium proportion of shade, cleared areas have low shade content. After segmentation, the homogeneous regions were grouped using an unsupervised classifier named ISOSEG.