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The Ordnance Survey (OS) is the national mapping agency for Great Britain. [ 2 ] The agency's name indicates its original military purpose (see ordnance and surveying), which was to map Scotland in the wake of the Jacobite rising of 1745.
This file is licensed by the Ordnance Survey of the United Kingdom under their OS OpenData License In short: you are free to distribute and modify the file as long as you attribute (including year), the Ordnance Survey.
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.
Triangulation station. A trigonometrical station in Sunset Peak, Hong Kong. A triangulation station, also known as a trigonometrical point, and sometimes informally as a trig, is a fixed surveying station, used in geodetic surveying and other surveying projects in its vicinity. The nomenclature varies regionally: they are generally known as ...
Ordnance Survey cross symbols Used on Ordnance Survey maps to represent churches and chapels. A cross on a filled square represents a church with a tower; and a cross on a filled circle represents a church with a spire. Churches without towers or spires are represented by plain Greek crosses.
An orienteering map is a map specially prepared for use in orienteering events. It is a large-scale topographic map with extra markings to help the participant navigate through the course. These maps are much more detailed than general-purpose topographic maps, and incorporate a standard symbology designed to be useful to anyone, regardless of ...
Collins wrestled with the Ordnance Survey ultimatum for some 14 months, before deciding to proceed with full colour mapping, and seven regional guides were produced, in a format which was still current in 2019. They also produced a fold-out waterways map, and later guides to the Broads and the Scottish Canals.
Survey markers, also called survey marks, survey monuments, or geodetic marks, are objects placed to mark key survey points on the Earth's surface. They are used in geodetic and land surveying. A benchmark is a type of survey marker that indicates elevation (vertical position). Horizontal position markers used for triangulation are also known ...