Roman Britain (Historical Map and Guide): 7
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Roman Britain (Historical Map and Guide): 7
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Description
We used to hold our own archive of maps, air photography and survey records from our work in many countries around the globe over the last half century or more. This archive - also known as the Ordnance Survey International Collection - has sat with several custodians since 2003. Here you can discover the history of the International Collection and find details on where our records are archived. Individual trig stations and occasional bench marks are plotted, with heights, on DOS 1:125 000 and larger-scale mapping. International boundary survey data During 2003 and 2004, Ordnance Survey and TNA sought suitable custodians of all parts of the collection and relocated them. The public could access the historical archives again from the end of 2004. Where are the International Collection archives now? The International Collection was the result of the work of the Directorate of Colonial Surveys, the Directorate of Overseas Surveys, Ordnance Survey (Overseas Surveys Directorate) and Ordnance Survey International. The history of the International Collection The Directorate of Overseas Surveys (DOS) survey data catalogue is stored in 49 Kalamazoo binders. The master control diagrams (MCDs), generally at 1:500 000 scale, show the position and classification of every astronomical, trigonometrical or Doppler station for which coordinates suitable for 1:50 000 scale mapping are held. Master trig diagrams (MTDs) on the same sheetlines and scale show the observed rays used to fix the trig stations.
Great Britain 1:1,000,000 (in the style of the International 1/1M map). Sheet 1 (North), Sheet 2 (South) A set of maps usually covering the whole of Great Britain in 1-2 sheets. Often these show thematic overlays to illustrate particular subjects and distributions: geology, military districts, population, historical snapshots including Roman Britain, and Britain in the Dark Ages, and the Principal Triangulation. The RGS-IBG collection contains all series produced by the Directorate of Colonial Services (DCS) and its subsequent successors between 1946 and 1999. This includes:A small-scale guide to this photography is included in the DOS Annual Reports from 1951 to 1984, to be held by The National Archives (TNA). Other photography in the collection is shown on non-DOS cover diagrams or sortie plots produced by the originator of the photography. Summary diagrams for each country illustrate the location of all photography. The principal points of photos used in the mapping are shown and numbered on almost all DOS 1:50 000–1:125 000 scale topographic maps and provide accurate indications of the location of individual photos. Air photo mosaics and print laydowns (uncontrolled mosaics produced as map substitutes on standard sheetlines in advance of the regular mapping) are archived at the National Collection of Aerial Photography. A basic scale used on former British territories was 1:50 000. Smaller scales were used in arid lands such as British Somaliland (1:125 000) and parts of Botswana (1:125 000, later 1:100 000). Larger scales (1:25 000) in Mediterranean and Caribbean islands. "Selected" areas, and sometimes whole islands (Malta, Gozo, Bermuda), were mapped at 1:2500 scale (occasionally 1:5000, 1:2400, 1:1200) and, rarely, at 1:500 scale (Male, Stanley). They're filed under code AD rather than by individual country. Directorate of Overseas Surveys survey data catalogue listed chronologically)• ca. 1852? - Diagram shewing the principal triangulation for the Ordnance Survey of Great Britain and Ireland. Other agencies’ editions in series produced jointly by DOS, national mapping agencies and British Military Survey
Between 1946 and the late 1980s, Directorate of Overseas Surveys (DOS) field parties worked towards establishing ground control (planimetric and height) for mapping, observing national primary and secondary survey frameworks, and assisting with tertiary and cadastral control and levelling. The collection includes results of control surveys by other organisations, some connected to DOS schemes and most used by DOS in its mapping programmes.The collection holds approximately 1.5 million monochrome, vertical aerial photographs. Each one is survey-standard and suitable for viewing stereoscopically in 3D. Most are at nominal scale 1:30 000 – 1:60 000 and in 230 mm by 230 mm format. Mostly panchromatic, though there are infrared, monochrome prints, off-colour, infra-red negatives, and a few colour prints. In addition to contract photography, the collection occasionally holds cover obtained by the national survey departments, and other aid agencies such as the Canadian International Development Agency. Ordnance Survey already had its own international division. When the two organisations were merged in 1984, all international aerial photographs, maps, and survey data were amalgamated into one working collection. It was named Technical Information and Support Services and kept that title for seven years, before being renamed International Library in 1991. RAF photography at varying scales is held, along with Royal Navy photography. Additional records exist for more than one set of cover at various dates and is available for environmental research, geomorphology, vegetation, communications, and settlement, across a 40–50-year time span. The many existing remains of víae publicae. These are often sufficiently well preserved to show that the rules were, as far as local material allowed, closely followed in practice.
- Fruugo ID: 258392218-563234582
- EAN: 764486781913
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