O sensor oli-landsat/8: interpretação visual de imagens na área de manancial do município de Passo Fundo/RS

Abstract

Considering the geopolitical conjuncture of current times, environmental issues require urgent attention. In the last two decades, the discussions about environmental subjects have gained spotlight in the mainstream media, in its various formats - Instagram posts, specialized websites, twitters, and others. A set of elements contribute to the increase of transnational capital's attacks on Gaia's land. In this historical moment, the speed of information and its democratization is vital. The geospatial information, built by methodological flows established in the specific literature, effectively contributes to society's awareness and make them look for solutions to the current environmental problems. In this regard, it is necessary the reinforcement of methodological flows, the verticalization and the knowledge of geotechnological tools, which belong to the area known as Geoinformation Science. Potentiality expressed in: Geographic Information Systems (GIS), Remote Sensing of Environment (RAS) and Geoprocessing. In this perspective, this final paper has as its main purpose to promote the comprehension of the use and occupation dynamics of the land in the water spring area in Passo Fundo/RS, through the interpretation of specific land use and occupation categories. We should mention that the geotechnological inclusion was only possible through the access and use of geospatial data supplied by the LANDSAT-8 platform. The specific objectives were: to elaborate systematic studies on the availability of LANDSAT-8 / OLI scenes and percentage of cloud cover; to elaborate image maps from the historical series 2013 - 2021, using LANDSAT-8 / OLI scenes; to interpret the visual of the LANDSAT-8 / OLI fused image for the spring area of the Passo Fundo/RS municipality. To develop the research, four methods were used: bibliographic research, geospatial data survey, elaboration of cartographic products and image vectorization and land use and occupation analysis. The results achieved during this survey are presented in the form of graphs, charts and cartographic products, which are useful in helping to make better decisions for future researches. The cartographic products help to understand the local dynamics of the spring area in the municipality of Passo Fundo/RS.