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The British Geological Survey was founded in 1835 as the Ordnance Geological Survey under Henry De la Beche, and remained a branch of the Ordnance Survey until 1965. At the same time, the uneven quality of the English and Scottish maps was being improved by engravers under Benjamin Baker. By the time Colby retired in 1846, the production of six ...
The Ordnance Survey International or Ordnance Survey Overseas Directorate its predecessors built an archive of air photography, map and survey records for the United Kingdom from 1946 to 1999. The Ordnance Survey International Collection (formerly the Ordnance Survey International Library) held mapping records that were acquired outside the UK.
Ordnance Survey originally came to Southampton on 12 November 1841, a fortnight after a fire had destroyed its headquarters in the Tower of London.It took over vacant buildings that had been built between 1794 and 1806 as barracks for the Duke of York's Royal Military School, before being used between 1816 and 1840 as a branch of the Chelsea-based Royal Military Asylum. [1]
The Hounslow Heath baseline (in blue) and Heathrow Airport's perimeter and 2 main runways (in yellow) superimposed on an Ordnance Survey map of 1935. The first task of any survey is to establish a baseline and, after a search by Roy and three other members of the Royal Society on 16 April, they fixed upon the heart of what was mainly still common land, the western swathe of Hounslow Heath.
Under the Ordnance Survey Ireland Act 2001, the Ordnance Survey of Ireland was dissolved and a new corporate body called Ordnance Survey Ireland was established in its place. [3] OSI was an autonomous corporate body, with a remit to cover its costs of operation from its sales of data and derived products, which sometimes raised concerns about ...
The Ordnance Survey established the observatory in 1915 to contribute to the measurement of a national vertical datum defined by mean sea level.The subsequent 6-year measurement campaign at the observatory, conducted from 1 May 1915 to 30 April 1921, determined the value of mean sea level as 4.751 m (15.59 ft) below the level of the brass bolt benchmark inside the hut.
The Ordnance Survey of Jerusalem of 1864–65 was the first scientific mapping of Jerusalem, and the first Ordnance Survey to take place outside the United Kingdom. [1] It was undertaken by Charles William Wilson, a 28-year-old officer in the Royal Engineers corps of the British Army, under the authority of Sir Henry James, as Superintendent of the Ordnance Survey, and with the sanction of ...
While the Ordnance Survey had surveyed a large part of the country, the scale at which the maps should be made and what was the most useful had yet to be decided. Sir Henry was a firm believer in the 1:2500 scale, and he used his position to effect this change despite the less than full approval of his superiors.