Análise de imagens Landsat 8 e imageamento por drone para pesquisa mineral de rochas carbonáticas no município de Independência

Abstract

This work consists of analyzing Landsat 8 satellite images and drone images with the objective of researching carbonate rocks in a specific area of the city of Independência 4 CE, which extends over 130 hectares. For image processing, methods were applied to enhance the satellite image using the QGIS program, employing the RGB (RED, GREEN, BLUE) technique and Band Ratio, aimed at reducing atmospheric reflectances and discriminating spectral errors, thereby improving the identification of mineralogical bodies and their lithologies. The methods used yielded good results, identifying errors and highlighting the presence of carbonate bodies in the processed images with bands 642 and 42/52/56, which proved to be the most suitable for these results, as well as for other lithological bodies found near the carbonate bodies. As proof of their existence, the drone images highlight the carbonate bodies, demonstrating their karst features.