Geographical research in India aims to understand the physical and human characteristics of the country, including its landforms, climate, vegetation, population, and economic activities.

West Bengal has the highest number of geographical research institutions in India, including the University of Calcutta, Jadavpur University, and the Indian Statistical Institute.

Human geography is the main focus of geographical research in India, with a focus on population studies, settlement patterns, and economic activities.

S.P. Chatterjee is known for his work on the concept of 'drainage density', which is a measure of the closeness of spacing of streams in a drainage basin.

K.N. Singh proposed the 'theory of peninsular India', which suggests that the Indian Peninsula was formed by the collision of two continental plates.

R.L. Singh is known for his work on the 'theory of Himalayan uplift', which suggests that the Himalayas were formed by the collision of the Indian and Eurasian plates.

S.C. Bose proposed the 'theory of Indian monsoons', which suggests that the Indian monsoons are caused by the differential heating of land and sea.

S.P. Chatterjee is known for his work on the 'theory of Indian agriculture', which suggests that Indian agriculture is a product of the interaction between physical and human factors.

K.N. Singh proposed the 'theory of Indian urbanization', which suggests that Indian urbanization is a product of the interaction between economic, social, and political factors.

R.L. Singh is known for his work on the 'theory of Indian industrialization', which suggests that Indian industrialization is a product of the interaction between technological, economic, and political factors.

S.C. Bose proposed the 'theory of Indian transportation', which suggests that Indian transportation is a product of the interaction between physical, economic, and social factors.

K.N. Singh is known for his work on the 'theory of Indian tourism', which suggests that Indian tourism is a product of the interaction between natural, cultural, and economic factors.

R.L. Singh proposed the 'theory of Indian environmental issues', which suggests that Indian environmental issues are a product of the interaction between physical, economic, and social factors.

S.C. Bose is known for his work on the 'theory of Indian sustainable development', which suggests that Indian sustainable development is a product of the interaction between economic, social, and environmental factors.

S.P. Chatterjee proposed the 'theory of Indian geographical research', which suggests that Indian geographical research is a product of the interaction between physical, human, and economic factors.