Dr.R.Subhashini, S.Ancy
In the recent years several studies have been made to predict the climate change in an urban area. Modification of land cover may also increase in the surface temperature. The surface temperature image through airborne or satellite remote sensing with angle less than 20‟ is considered and the urban heat is measured from the surface temperature maps of Chennai. The surface temperature maps of twelve years categorized into two intervals of two years each is considered for the measurement of the temperature. The actual ground data is studied and the radiance values of the satellite channels are converted into brightness temperature using inverse plank‟s equation of radiation. Then using price technique the surface temperature is measured. We then fit the entire form into a Gaussian surface and find out heat magnitude of the entire city, spatial extent of the city, orientation from the latitudinal and longitudinal extent of the Gaussian surface.
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