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Hello. My name is Denis Arnaud, also known as Denis.arnaud on selected MediaWiki sites. I am 53 years of age, and now live in Essen, Germany. I work as a head of optimization and data engineering in the digital division of a world-wide logistics company.
A Plan of the Cities of London and Westminster, and Borough of Southwark is a 1746 map of the City of London and surrounding area, surveyed by John Rocque and engraved by John Pine. Rocque combined two surveying techniques: he made a ground-level survey with a compass and a physical metal chain – the unit of length also being the chain. Compass bearings were taken of the lines measured. He also created a triangulation network over the entire area to be covered by taking readings from church towers and similar high places using a theodolite made by Jonathan Sisson (inventor of the telescopic-sighted theodolite) to measure the observed angle between two other prominent locations. The process was repeated from point to point. This image depicts all 24 sheets of Rocque's map.
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