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  2. Ordnance Survey - Wikipedia

    en.wikipedia.org/wiki/Ordnance_Survey

    The original draftsman's drawings for the area around St Columb Major in Cornwall, made in 1810. Detail from 1901 Ordnance Survey map of the Imperial fortress colony of Bermuda (showing St. George's Town and St. George's Garrison), compiled from surveys carried out between 1897 and 1899 by Lieutenant Arthur Johnson Savage, Royal Engineers.

  3. Ordnance Survey National Grid - Wikipedia

    en.wikipedia.org/wiki/Ordnance_Survey_National_Grid

    The Ordnance Survey National Grid reference system (OSGB), also known as British National Grid (BNG), [1][2] is a system of geographic grid references, distinct from latitude and longitude, whereby any location in Great Britain can be described in terms of its distance from the origin (0, 0), which lies to the west of the Isles of Scilly. [3]

  4. OS MasterMap - Wikipedia

    en.wikipedia.org/wiki/OS_MasterMap

    The OS MasterMap is the premier digital product of the Ordnance Survey. It was launched in November 2001. It is a database that records every fixed feature of Great Britain larger than a few meters in one continuous digital map. Every feature is given a unique TOID (TO pographical ID entifier), a simple identifier that includes no semantic ...

  5. Template:Ordnance Survey - Wikipedia

    en.wikipedia.org/wiki/Template:Ordnance_Survey

    This template is for providing a reference for the Ordnance Survey maps. To specify an access date, use "access-date=". For example, {{Ordnance Survey|access-date=8 April 2024}} will yield: Ordnance Survey. OS Maps Online (Map). 1:25,000. Leisure

  6. Cassini Grid - Wikipedia

    en.wikipedia.org/wiki/Cassini_Grid

    The Cassini Grid was a grid coordinate system used on British military maps during the first half of the twentieth century, particularly during World War II. The referencing consists of square grids drawn on a Cassini projection. For a period after the war, the maps were also used by the general public. The system has been superseded by the ...

  7. Template:Ordnance Survey coordinates - Wikipedia

    en.wikipedia.org/wiki/Template:Ordnance_Survey...

    Ordnance Survey coordinates. Template documentation. This template is used on and changes may be widely noticed. Test changes in the template's or subpages, or in your own . Consider discussing changes on the before implementing them. This template creates a link to a list of map sources. It is the same as { { coord }} but uses a UK Ordnance ...

  8. Ordnance Survey Great Britain County Series - Wikipedia

    en.wikipedia.org/wiki/Ordnance_Survey_Great...

    The Ordnance Survey Great Britain County Series maps were produced from the 1840s to the 1890s by the Ordnance Survey, with revisions published until the 1940s.The series mapped the counties of Great Britain at both a six inch and twenty-five inch scale with accompanying acreage and land use information.

  9. Ordnance datum - Wikipedia

    en.wikipedia.org/wiki/Ordnance_datum

    View from Newlyn harbour showing the lighthouse and Newlyn Tidal Observatory to its right, both painted red and white. An ordnance datum (OD) is a vertical datum used by an ordnance survey as the basis for deriving altitudes on maps. A spot height may be expressed as above ordnance datum (AOD). Usually mean sea level (MSL) at a particular place ...