Temperatura superficial terrestre en Algeciras Huila, una comparación entre teledetección e información in situ para el año 2021
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The purpose of this research work is to verify the feasibility of using Landsat 8 images (remote sensing) to estimate the Land surface temperature (LST) in the municipality of Algeciras, Huila; comparing the data obtained through digital image processing with those obtained in situ through traditional methods. The calculation used in the images integrates formulas and key concepts in remote sensing and interpretation of satellite images, such as reflectance, radiance, emissivity, normalized difference vegetation index (NDVI), proportion of vegetation; which allowed a better processing of the images and it is expected that the results have a high degree of veracity due to the correction of the aforementioned phenomena. The study area corresponds to the municipality of Algeciras, Huila, corresponding to path 8 and row 58 for the satellite images used, with time reference to the year 2021, specifically the months of January, July and October. Algeciras is located near the eastern mountain range of Colombia, near the PNN Cordillera Los Picachos, which is why its topography is quite uneven and in situ measurements of environmental variables present complications, mainly to access certain points in the municipality. Taking as a reference the results obtained through digital image processing, remote sensing is seen as a fairly strong and reliable alternative for the measurement of these variables, in this case precisely the Earth's surface temperature, thus providing alternatives to traditional methods that are characterized due to economic and accessibility limitations.