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What is Great Trigonometric Survey of India about?

The Great Trigonometric Survey was a 19th century project of the Survey of India that mapped British territories in India over 60 years. It accurately measured sections of longitude and the heights of mountains like Everest. The initial baseline was measured with great precision in 1802, and corrections were made for factors like earth curvature and refraction to achieve high accuracy. The project was led by figures like William Lambton and George Everest, and brought great wealth to some of the surveyors.

Author

Sahil Jindal

Language

EN