Imagens sentinel-2 na avaliação do uso e ocupação do solo no Extremo Sul da Bahia

Abstract

In Bahia, the Extreme South region is a reference in eucalyptus cultivation, with extensive planted areas. Although it is an activity of great socioeconomic importance, the expansion of planted forests changes the dynamics of the landscape of the regions where they are located. To monitor this progress, the analysis of land use and occupation contributes to understanding landscape changes and provides support for territorial, urban and environmental planning, as well as for preservation areas. Thus, the objective was to map land use and occupation with an emphasis on forestry and permanent preservation areas in the municipalities of Mucuri and Eunápolis, Far South of Bahia. From Sentinel-2 RGB-Infrared composition images, mosaics were assembled, features were cropped and automatic classifications were carried out (MAXVER AND ISODATA), delimiting them into eight thematic classes. Confusion matrices and Kappa index were subsequently created to assess accuracy. The preservation areas were vectorized using the IBGE hydrography map, compared with land use maps and information on anthropogenic use was extracted about the restricted areas. The classifiers used showed applicability for the study, with MAXVER being evaluated as excellent by the Kappa index and lower errors of commission and omission. The Planted Forests and Pastures classes stood out for occupying large areas in the municipalities evaluated. Permanent preservation areas are in disagreement with current environmental legislation, as they are occupied by anthropogenic activities such as Forestry, Pastures and Agriculture.