Abstract
INSAT ‐1D (Indian National Satellite) VHRR (Very High Resolution Radiometer) daytime visible (0.55-0.75μ) and thermal infrared (10.5-12.5μm) data have been used for delineation of areas under snow cover in the Himalayas. The boundary of the Himalayan frontal thrust belt and other with major structural features could also be demarcated in the processed image. Two different image processing techniques, namely thresholding and textural method were adopted to delineate the areas under snow cover. Thresholding technique was better suited here, though textural method has got a no. of advantages e.g. dimensionality increment etc. which is suited particularly for handling single band data. Results also show more and more snow accumulations over the regional lineaments and tectonic patterns (using INSAT VHRR data).
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