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Survey of India, the national survey and mapping organization, works under the :
Explanation
The Survey of India (SoI) is the National Survey and Mapping Organization of the country and is the oldest scientific department of the Government of India, having been established in 1767.
It functions as an attached office under the Department of Science & Technology, which falls under the Ministry of Science and Technology. The organization is responsible for all geodetic control, topographical surveys, and mapping within India, providing the foundational data for development and internal security.
While the Ministry of Earth Sciences deals with meteorology and oceanography, and the Ministry of Home Affairs oversees the Census of India, the administrative and functional control of the nation's premier mapping agency rests with the Ministry of Science and Technology.