With a total land area of 3,287,263 square kilometres, India is the seventh-largest country in the whole world. India is the big nation in south Asia and around one-third the United States area.
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When it comes to knowing about the topography, India is divided in three geographic regions: in the north, the Himalayan region having greatest mountains of the world, Gangetic Plain, the plateau region in south, central part. The three big river systems—River Ganga, River Indus, and River Brahmaputra arise in the Himalayas.
India can be classified into seven physiographic regions. They are:
- The northern mountains including the Himalayas, Hindu Kush and Patkai ranges.
- Indo-Gangetic plains or Great Plains - large floodplains of the river syatems of Indus and Ganga-Brahmaputra.
- Thar Desert or Great Indian Desert is seventh largest desert of the world forming a significant portion of the western India.
- Central Highlands consisting in the west, the Malwa Plateau, in the south, the Deccan Plateau and in the east, the Chota Nagpur Plateau.
- Eastern Coastal Plain - between Eastern Ghats and Bay of Bengal stretching from Tamil Nadu to West Bengal.
- Western Coastal Plain - between Western Ghats and Arabian Sea from Gujarat, Maharashtra, Goa, Karnataka and Kerala.
- Bordering seas and islands - The Lakshadweep in the Arabian Sea and the Andaman and Nicobar Islands in the Indian Ocean are the major islands.