01727nam a22002417a 4500 20220325093548.0 220325b ||||| |||| 00| 0 eng d 0060195185 Aloy eng 23 526.954 KEAG John Keay 25799 Great arc: The dramatic tale of how India was mapped and everest was named New York Harper Collins Publishers 2000 xxi,182 p. HB 22x14 cm. Mathematical Geography 24.00 $ 24.00 A vivid description of one of the most ambitious scientific projects undertaken in the 19th century, and the men who undertook the measurement of the Himalayas and the mapping of the Indian subcontinent: William Lambton and George Everest. The graphic story of the measurement of a meridian, or longitudinal, arc extending from the tip of the Indian subcontinent to the mountains of the Himalayas. Much the longest such measurement hitherto made, it posed horrendous technical difficulties, made impossible physical demands on the survey parties (jungle, tigers, mountains etc.), and took over 50 years. But the scientific results were commensurate, including the discovery of the world’s highest peaks and a new calculation of the curvature of the earth’s surface. The Indian Mutiny of 1857 triggered a massive construction of roads, railways, telegraph lines and canals throughout India: all depended heavily on the accuracy of the maps which the Great Arc had made possible. India Great Trigonometrical Survey History 25800 Godesy India 25801 Himalaya Mountains 25802 KEAY (John) 25803 ddc GF 222023 222023 0 0 ddc 0 0 OTH AL AL 2013-03-24 0 526.954 KEAG GF03046 2022-03-25 00:00:00 2022-03-25 GF