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  2. File:Ordnance Survey 1-250000 Legend 2010.pdf - Wikipedia

    en.wikipedia.org/wiki/File:Ordnance_Survey_1...

    This file is licensed under the United Kingdom Open Government Licence v3.0.: You are free to: copy, publish, distribute and transmit the Information; adapt the Information; ...

  3. 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.

  4. Retriangulation of Great Britain - Wikipedia

    en.wikipedia.org/wiki/Retriangulation_of_Great...

    Ordnance Survey (1967). The history of the retriangulation of Great Britain 1935-1962 (PDF). London: Her Majesty's Stationery Office; Owen, Tim; Pilbeam, Elaine (1992). Ordnance Survey, map makers to Britain since 1791 (PDF). Southampton: Ordnance Survey (HMSO). ISBN 9780319002490. OCLC 28220563

  5. Principal Triangulation of Great Britain - Wikipedia

    en.wikipedia.org/wiki/Principal_Triangulation_of...

    The first Ramsden theodolite as used by Roy. (Destroyed by bomb damage in 1941.) In the aftermath of the Jacobite rising of 1745 it was recognised that there was a need for an accurate map of the Scottish Highlands and the necessary survey was initiated in 1747 by Lieutenant-Colonel David Watson, a Deputy Quartermaster-General of the Board of Ordnance.

  6. Ordnance Survey Great Britain County Series - Wikipedia

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

    The Ordnance Survey began producing six inch to the mile (1:10,560) maps of Great Britain in the 1840s, modelled on its first large-scale maps of Ireland from the mid-1830s. This was partly in response to the Tithe Commutation Act 1836 which led to calls for a large-scale survey of England and Wales.

  7. 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 (TOpographical IDentifier), a simple identifier that includes no semantic ...

  8. Ordnance Survey Drawings - Wikipedia

    en.wikipedia.org/wiki/Ordnance_Survey_Drawings

    The Ordnance Survey Drawings are a series of 351 of the original preliminary drawings made by the surveyors of the Ordnance Survey between the 1780s and 1840 in preparation for the publication of the one-inch-to-the-mile "Old Series" of maps of England and Wales.

  9. National mapping agency - Wikipedia

    en.wikipedia.org/wiki/National_mapping_agency

    The Ordnance Survey maintains a mapping database from which they can print specialist maps at virtually any scale. [60] The Ordnance Survey National Grid divides Great Britain into cells 500 km, 100 km, 10 km and 1 km square on a Transverse Mercator grid aligned true north–south along the 2°W meridian. OS map products are based on this grid.