Thermal Mapping Using Remote Sensing and GIS Techniques

In the study mapping of Land surface temperature (LST) has been carried out using LANDSAT-8 data and ArcGIS techniques. LST have wide application viz; evapotranspiration, global climate change, hydrological cycle, vegetation monitoring, urban climate, land use/land cover mapping and environmental studies. An attempt has been made using LANDSAT-8 TIRS B10 (Thermal Band) to derive LST of different land cover surfaces of the study area. Various mathematical algorithms developed were used in processing of LANDSAT-8 data in ArcGIS software for deriving the LST from it. LANDSAT-8 satellite imagery Band 10 data, during 23 Jan. 2016, 08 Feb. 2016, 11 March 2016 and 12 April 2016 were processed for thermal analysis. LST maps have been prepared from it showing the spatial and temporal distribution of land surface temperature in the watershed. Furthermore, land use/land cover mapping (LU/LC) was carried using bands 2, 3, 4, 5 & 6 of the LANDSAT 8 data. LU/LC mapping done by supervised classification using the maximum likelihood classification algorithm of ArcGIS. Thermal data analysis has provided the surface temperature of each land cover units of every month. A Remarkable difference has been found in the temperatures of different land cover units like agricultural land, Built-up, bare and forest land. This difference is because of their different emissivity. Correlation plot has been made in between the atmospheric temperature and LST showing R²=0.92.