Up to 50 copies can be produced within 45 minutes. published less than 50 years ago, one A4 from each tile or sheet can be supplied without permission from the Ordnance Survey. For Ordnance Survey maps in copyright, i.e. The Maps Reading Room has a rapid copy service tailored to the needs of site researchers. Large-scale OS plans are also available for Northern Ireland and Eire. This includes post World War II National Grid paper sheets until the 1980s, microfilm aperture cards from the 1980s until 1997 and a digital data terminal from 1997 onwards. Resources available include a comprehensive collection of large-scale Ordnance Survey plans for Great Britain and Ireland dating back to the mid-19th century. are very welcome to visit the Maps Reading Room. Site researchers into the incidence of contaminated land etc. Ordnance Survey Resources for Environmental Site Researchers A comprehensive guide is available at Small Scale OS Maps. They were followed by the 1” to the mile survey which later became the 1:50,000 series, on national grid lines. They are generally made at 2” to the mile and cover England and Wales as far north as a line from Preston to Hull. The first small-scale maps are the Ordnance Surveyors Drawings between 17. Small Scale (2” to the mile, 1” to the mile or 1:50,000) Ordnance Survey To get a 1:2500 sheet number remove the 3rd and 6th digits, e.g. Type in a placename or postcode and a 2-letter, 6-digit grid reference will display eg. To determine the grid reference for the map you require use the county indexes available in the Maps Reading Room or go to the 'Get-a map' service on the the Ordnance Survey website. Since 1997 Ordnance Survey has supplied the Legal Deposit Libraries with digital mapping, namely LandLine® and then Ordnance Survey MasterMap ® data. From c.1946 until about 1980 the maps were produced on paper sheets between 1980 and until 1999 the maps were supplied on microfiche. The National Grid is a single grid system covering Great Britain. Since World War II, the modern equivalent of county series mapping has been the National Grid series at scales of 1:10,560/1:10,000 for rural and moorland areas, 1:2,500 and 1:1250 for urban areas (c.6 inches to 1 mile, c.25 inches to 1 mile and c.50 inches to 1 mile). List of 6”, 25” and 5' London editions with index maps.List of 25” County editions for England and Wales, excluding London.The advantage of microfiche/film is that it is easy to take copies from. These tables give information on the dates of each edition for a particular area, and also if they exist in microfiche/film. Guide to large scale Ordnance Survey maps of Ireland.Guide to large scale Ordnance Survey maps of Great Britain.These are organised by county then sheet number. All pre-World War II 1:2500 editions are now available on microfiche. This places the working position of the origin a little to the south-west of Lands End and ensures that the co-ordinates of all points on the mainland of Great Britain are positive and less than 1,000 km.Our most frequently consulted items are the large-scale plans, which began to be published in the mid-19th century as the 25 and 6 inches to the mile County Series (c.1:2500 and 1:10,560), and town plans at larger scales. subtracted from all northing co-ordinates. have been added to all easting co-ordinates and 100 km. When rectangular co-ordinates are referred to this origin, the easting co-ordinates of points to the west of the central meridian are negative, and the northing co-ordinates, though all positive, become inconveniently large for points in northern Scotland. 2° W., has now been adopted as the national projection for general use over Great Britain. Accordingly an orthomorphic projection, known as the Transverse Mercator, with its origin at lat. The recommendation compels the use of a projection that will not introduce unacceptable distortions, on any of the scales, when it is extended over an area the size of Great Britain. THE Departmental, Committee appointed in 1935 by the Minister of Agriculture and Fisheries to consider Ordltoyras Survey plans and maps recommended that tha large-scale plans of Great Britain should be re-fast on national sheet lines and that a national griabjwitn the metre as unit, should be superimposed on all large-scale plans and most of the small-scale maps.
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