Identificação do desmatamento através da análise comparativa do Normalize Difference Vegetation Index (NDVI) e Ratio Vegetation Index (RVI) no município de Juiz de Fora - MG

The vegetation indices are used in various areas of remote sensing. They are mainly used in environmental studies interested in doing analysis on land cover in a certain region. This study has as objective to compare two types of vegetation indices in rural Juiz de Fora (MG). This comparison will be done with images georeferenced. The proposed work can provide data for monitoring and prevention of common deforestation in the region. The reason of deforestation has been: creating new roads, mains, pipes for sanitation and urban sprawl. The data analyzed in the LANDSAT TM sensor - 5 which make it possible to monitor natural resources. The comparison between the vegetation index (NDVI) and ratio vegetation index (RVI) is performed on an area in a given time period. This comparison allows the identification of biomass and its spatial distribution for auxiliary information in many geographical information systems to date and accurate fashion. The results showed that the images with the values of RVI and NDVI are very similar; however the NDVI has better clarity to target classes. The RVI detected almost twice deforested areas, which makes the NDVI a more reliable indicator, also shows an important tool in the identification of plant biomass.Pages: 4411-441