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100km squares Grid square TF. The map shows The Wash and the North Sea, as well as places within the counties of Lincolnshire, Cambridgeshire and Norfolk.. The first letter of the British National Grid is derived from a larger set of 25 squares of size 500 km by 500 km, labelled A to Z, omitting one letter (I) (refer diagram below), previously used as a military grid. [4]
A graphical or bar scale. A map would also usually give its scale numerically ("1:50,000", for instance, means that one cm on the map represents 50,000cm of real space, which is 500 meters) A bar scale with the nominal scale expressed as "1:600 000", meaning 1 cm on the map corresponds to 600,000 cm=6 km on the ground.
The continental scale level refers to a continent; The global scale applies to the entire world; The fluvial scale level relates to river basins (this scale level is mainly used in the context of pollution, for example). Global and continental scale: the world with continents. National and regional scale:The United States with all the states ...
The least detailed nineteenth century map is from 1812 and is by Robert Wilkinson, at a scale of 1:1,625,000 (British Library shelfmark Maps 177.d.2.(15.)). The intermediate scale map is Smith's New Map of the United Kingdom of Great Britain and Ireland: on which the Turnpike, and Principal Cross Roads, are carefully described.
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.
The Survey's large-scale mapping comprises 1:2,500 maps for urban areas and 1:10,000 more generally. (The latter superseded the 1:10,560 "six inches to the mile" scale in the 1950s.) These large scale maps are typically used in professional land-use contexts and were available as sheets until the 1980s, when they were digitised. Small-scale ...
The project is sponsored by the Ordnance Survey, and extracts from the OS Landranger 1:50,000 scale maps illustrate the grid square pages. Geograph Project Limited is a charity registered in England and Wales, [5] and the name Geograph is trademarked. [6]
The primary source for this database is the United States Defense Mapping Agency's (DMA) operational navigation chart (ONC) 1:1,000,000 scale paper map series produced by the US, Australia, Canada, and the United Kingdom.