Avaliação da evolução temporal do NDVI e estimativa da área de cana-de-açúcar, no estado de São Paulo, com imagens MODIS.

Abstract

Brazil is the world leader in the production and exportation of sugar-alcohol and energy bagasse cogeneration. Due to the high importance of sugarcane production in Brazil it is important to have safe estimates and surveys of the cultivated areas. Therefore, the development of methodologies for the use of remote sensing in sugarcane area mensuration is justified. Given the periodicity, scope, spatial resolution and spectral bands, the images from the MODIS sensor have a very high potential to study the biomass evolution. The objective of this study is to evaluate the area with sugarcane culture, in São Paulo, using MODIS sensor images, spatial resolution 250m, and study the temporal evolution of NDVI indicator in the regions with culture. The study has shown that there is a potential in the use of 250m MODIS images for the classification of areas with sugarcane in the Estate of São Paulo, since the built supervised classification obtained Kappa indexes in the two regions analyzed, of 0.686 and 0.774. Also, in comparison to the official data (IBGE), overestimated the planted area in 4.76%. It also concludes that the analysis of the temporal behavior of the NDVI-MODIS 250m allows keeping track on the variation of the biomass during the phenological cycle of the sugarcane.