Análise temporal do uso e cobertura da terra de uma microbacia no município de Fortim – CE, através da comparação de duas metodologias de mapeamento da terra

Abstract

Land use and land cover are essential elements for understanding the dynamics and transformation of terrestrial spaces. Therefore, obtaining detailed and accurate information about these spaces is a necessary condition for planning and decision-making activities, and land use and land cover maps are instruments that assist in fulfilling this function. The main objective of this research is to use Geoprocessing and Remote Sensing tools to analyze the land use and land cover of a micro-watershed located in the municipality of Fortim-CE, by comparing the data provided by the MapBiomas platform with a supervised classification performed using Landsat 5 and 8 satellite images. Four classes were found for the study area in all analyzed years: vegetation, agriculture, non-vegetated areas, and water bodies. The main discrepancy found in the mappings was the non-vegetated areas located in the northeastern part of the micro-watershed. The method used by MapBiomas was able to more accurately locate the urban area, while the supervised classification confused the classes of non-vegetated areas and agriculture. Another point of divergence between the methods was the identification of CE-040. MapBiomas failed to delineate the contour of the highway, while the supervised classification successfully identified its contour. The methodologies presented similarities, especially in vegetation and water body areas, this similarity was also identified in some agricultural areas.