Early Ordnance Survey stations, 1799

Early Ordnance Survey stations, 1799

C009/5091 Rights Managed

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Credit: ROYAL ASTRONOMICAL SOCIETY/SCIENCE PHOTO LIBRARY

Caption: Early Ordnance Survey stations. Diagrams of some of the triangulations stations (including Greenwich Royal Observatory and Dover Castle) used in the 1784-1796 surveys of England and Wales. The stations (usually church towers or castles) formed connected triangles (see C009/5094), and measuring the angles between them allowed accurate maps to be constructed. This work was first published in Philosophical Transactions of the Royal Society, then later in volume one of a 1799 report by Mudge and Dalby for the government's Board of Ordnance. This would eventually form the basis of the UK national mapping agency, the Ordnance Survey.

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