1Department of Geography, Mangaldai College, Dist. - Darrang, Assam – 784125, India
2Department of Environmental Studies, North Eastern Hill University, Shillong, Meghalaya, India
3Geo-spatial technology application program, Aaranyak, Guwahati, Assam , India
4Department of Remote Sensing, North Orissa University, Badipada, Orissa, India.
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