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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. James Gardner (surveyor) - Wikipedia

    en.wikipedia.org/wiki/James_Gardner_(surveyor)

    By 1823, Gardner had three roles: "Ordnance Survey computer, sole agent for the sale of its maps, and map-seller and/or cartographer of non-competing maps". [ 1 ] [ 4 ] His first and most ambitious map was that of the western and eastern hemisphere in 1825, each 48 inches (120 cm) in diameter.

  4. Key Largo - Wikipedia

    en.wikipedia.org/wiki/Key_Largo

    Key Largo (Spanish: Cayo Largo) is an island in the upper Florida Keys archipelago and is the largest section of the keys, at 33 miles (53 km) long. It is one of the northernmost of the Florida Keys in Monroe County , and the northernmost of the keys connected by U.S. Highway 1 (the Overseas Highway ).

  5. Key Largo, Florida - Wikipedia

    en.wikipedia.org/wiki/Key_Largo,_Florida

    Key Largo is located at (25.106637, -80.429917 It shares the island of Key Largo with Tavernier to the southwest and North Key Largo to the northeast. U.S. Route 1, the Overseas Highway, runs the length of the community, leading north 57 miles (92 km) to Miami and southwest 97 miles (156 km) to Key West.

  6. 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; ...

  7. Digimap - Wikipedia

    en.wikipedia.org/wiki/Digimap

    Digimap is a web mapping and online data delivery service developed by the EDINA national data centre for UK academia. It offers a range of on-line mapping and data download facilities which provide maps and spatial data from Ordnance Survey, British Geological Survey, Landmark Information Group and OceanWise Ltd Ltd., (marine mapping data and charts from the UK Hydrographic Office ...

  8. 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 ...

  9. Ordnance datum - Wikipedia

    en.wikipedia.org/wiki/Ordnance_datum

    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 is used for the datum.