The Great Trigonometrical Survey of India was one of the most noteworthy contributions that the British made to India. Nobody had mapped so much of the Earth’s surface before this project. Among many of its remarkable achievements, it helped identify the world’s tallest peak! And Chennai is where it all started… This reel is part of our special Chennai-a-Maze series that we are running in collaboration with @the_hindu to celebrate #MadrasMonth. Click the bell icon on the top right corner of our
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On 10th April 1802, the Great Trigonometrical Survey was commenced from St. Thomas Mount, Chennai (then Madras), marking the beginning of one of the most monumental scientific expeditions in the history. Spanning over decades, this herculean task was supported by countless Indians, whose invaluable contributions helped to shape the nation’s geospatial framework. The Great Theodolite, one of the instruments used in the Great Trigonometric Survey for measurement of horizontal and vertical angles,
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