Detection and geographical distribution of clearing areas in the savannas ('lavrado' ) of Roraima using Google Earth web tool

The objective of this study was to detect clearing areas (anthropogenic disturbance) and evaluate the geographical distribution of different land uses in the savannas (lavrado) of Roraima, Brazilian Amazonia. Data were obtained from visual interpretation of very high (Ikonos and QuickBird 2001 to 2007) to high (Landsat TruEarth® Mosaic 1999 to 2002) resolution images offered by Google Earth TM

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