Analysis of land surface temperature variation using thermal remote sensing spectral data of landsat satellite in Devikulam taluk, Kerala-India

Remote Sensing is the science of acquisition information about an object or phenomenon from a distance, typically from aerial sensor technology. Land Surface Temperature (LST) estimation through remote sensing data; therefore thermal infrared remote sensing plays a vital role in monitoring temperature field. It provides the information about the surface physical properties. This knowledge plays a major role in urban climatology, global environmental change, and human-environmental interactions. In remote sensing thermal bands (3 -14 μm) measure the radiations ‘emitted’ from the surface provide an opportunity for measure of temperature variation with reference to vegetation loss. This paper presents results of surface temperatures variation for the Devikulam Taluk, Kerala, India using three decadal Landsat series imagery such as Thematic Mapper (TM) for 1990, Enhanced Thematic Mapper (ETM+) for 2001 and 2010. In order to extract the surface radiance from the pixel value USGS, 2001. Landsat 7 Science Data user's Handbook procedure is followed. Data processing, analyzing and output display are duly carried out through ENVI software platform. The final result is evolved after the deep land surface variation analysis with respect to vegetation loss is reckoned.