Browsing by Author "Tabares Mosquera, Mauricio"
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Item Análisis multitemporal automatizado de zonas de bosque y no bosque sobre las cuencas hidrográficas de la región del Catatumbo,Norte de Santander(Universidad Santiago de Cali, 2022) Tabares Mosquera, Mauricio; González Velandia, Francy Juliana; Giraldo Restrepo, Juan CarlosGeographic information systems and remote sensing are frequently used as support in land planning, field work and the study ofchanges over the surface of the Earth. The method of calculating and classifying spectral indices is widely used to characterize large areas in a specific time period, allowing trends to be identified and changes in land use and cover to be monitored. This study analyzed the vegetation and the phenomenon of land conversion in four hydrographic basins of the Catatumbo region, Norte de Santander, Colombia, using SENTINEL-2 images captured in the years 2019 and 2022, which, after undergoing corrections, were used to calculate and compare NDVI and SAVI spectral indices. In this process, a Python language script was programmed to develop an ArcToolbox geoprocessing tool. With this tool, two scenarios were evaluated to estimate the influence of the expansion of the agricultural frontier and the urban centers of the study area. During the study period, while forest cover was reduced by 334 km2, grasses and shrubs grew by 260 km2, evidence of land conversion in this area with a significant presence of oil palm cultivation, illicit crops, and livestock activity. The validation stage showed an accuracy of 84% for the land cover generated by the model compared to the official land cover layer of Colombia Corine Land Cover