An index chart; Index Chart to the Great Trigonometrical Survey of India. Sh. 595 x 570 mm.Image taken from Index Chart to the Great Trigonometrical Survey of India; showing net work of Triangulation Completed to 1st May; 1870 (--1st October; 1895). Scale; 96 miles = 1 inch.Originally published / produced in Calcutta: Surveyor General's Office; 1870[-1895].Calcutta: Surveyor General's Office; 1870[-1895].From: Index Chart to the Great Trigonometrical Survey of.Maps. 144. e. 24; London; British Library.
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TOP20496972
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達志影像
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RM
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