Madhan Rajasekkharan

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It was during the campaign that Lambton came up with the idea of doing a survey of India using triangulation. Basically, this requires three mutually visible points as corners of a triangle. If one knows the length of any of the sides and can measure the angles, the length of the other sides can be established by trigonometry. The newly determined sides can then each be used to establish a new triangle and so on. It is tedious work but provides very accurate measurements. Lambton had another motive beyond just creating an accurate map of India. Using this methodology, he wanted to also use the ...more
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Land of seven rivers: History of India's Geography
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