Especialización en Sistemas de Información Geográfica
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Browsing Especialización en Sistemas de Información Geográfica by Author "Espinosa Valencia, Camilo Eduardo"
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Item Estimación de la superficie deforestada en el Parque Natural Nacional la Paya mediante el uso de Sensores Remotos para el periodo 2018-2022(Universidad Santiago de Cali, 2023-02-22) Espinosa Valencia, Camilo Eduardo; Cabezas Alzate, Diego FernandoDeforestation on protected areas becomes an environmental problem in which forest cover is exchanged for other types of surfaces such as livestock, crops or pastures. In the case of Colombia, the environmental entities in charge of managing and protecting the areas declared as National Natural Parks are the National System of Protected Areas (SINAP) and the Institute of Hydrology, Meteorology and Environmental Studies (IDEAM). Although these entities carry out quarterly controls and estimate forest losses in these protected areas, historical results show an upward trend in deforestation rates, generating environmental damage that directly affects nearby communities and resources in general. from the country. This study presents a low-cost monitoring based on remote sensors and Landsat 8 and 9 satellite images that allows quantifying forest losses with a higher temporality and a spatial resolution of 30 meters. The procedure includes the download and processing of the images within the Paya National Natural Park, for the period 2018-2022 and subsequently a supervised classification that discriminates the coverage into 2 classes, defined as forest and non-forest. Finally, a subtraction is made of the polygons classified as forest on the initial (USGS, 2022) and non-forest on the final date to quantify and locate the deforested areas within the park. The results show to be a successful method to identify coverage changes, however, the precision is limited by the cloudiness of the area and the spatial resolution, which generates alterations in the limits of homogeneous coverages.