India In Triangles: The Incredible Story Of How India Was Mapped And The Himalayas MeasuredStep into the boots of fearless surveyors as they trek across forests, mountains and monsoons? facing disease, wild animals and gruelling terrain? to chart the subcontinent with astonishing precision. This was the Great Trigonometrical Survey, an ambitious mission to map India using triangulation? a brilliant method that helped them measure every inch with accuracy. Along the way, they calculated the height of the worlds tallest mountain and revealed

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