Roman Britain (Historical Map and Guide): 7

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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).

A guide to main areas of primary triangulation and traverse, and secondary and minor control established by Directorate of Overseas Surveys (DOS), is provided in the DOS Annual Reports from 1959 to 1984.In Britannia, [2] as in other provinces, the Romans constructed a network of paved trunk roads to (surfaced highways). In their nearly four centuries of occupation (43 – 410 AD) they built about 2,000 miles of Roman roads in Britain. They are shown on the Ordnance Survey's Map of Roman Britain. [3] This is the most accurate and up-to-date layout of certain and probable routes that is available to the general public. There are two sets of air photographs. One is held at the National Collection of Aerial Photography (NCAP) in Scotland, and the second has been entrusted to Oxford University to support global climate change research. A guide to the areas mapped by DOS is included in the DOS Annual Reports from 1951 to 1984; later maps (1967 onwards) indicate areas where there is both pre- and post-1960 mapping. Sheet indices exist for most series. Three films showing DOS activities were transferred to the B ritish Film Institute's National Film and TV Archive. DVD copies of one of these films, a DOS training film, was supplied to all main repositories holding parts of the Ordnance Survey International Collection. Non-Directorate of Overseas Surveys mapping 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.

We would be able to overlay these historical maps onto modern maps, so that it would be possible to see the historical data in relation to current features. 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. By 1991 the last significant, aid-funded mapping projects had been completed by OSD and all survey parties had been disbanded. OSD’s title was changed to OS International and its priorities turned to consultancy, mainly in Eastern Europe, while traditional map production gradually declined. 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.

Directorate of Overseas Surveys book collection

Non-Directorate of Overseas Surveys (DOS) series were mainly produced by national survey departments and held in the original OS International Library. They don't form part of the Ordnance Survey International Collection (OSIC) map archive at the Royal Geographic Society with the Institute of British Geographers (RGS-IBG). The series has been offered to academic institutions throughout the British Isles. Directorate of Overseas Surveys progress folders HereWeGo is not the best known, but provides both mapping and recent aerial photo coverage. The layers control to access the aerial imagery is in the bottom right corner of the screen Lecture & Seminar Series

The directions for making pavements given by Vitruvius. The pavement and the via munita were identical in construction, except as regards the top layer. In 2002, Ordnance Survey deemed its International Library no longer needed for operational purposes. Responsibility for these public records then passed to The National Archives (TNA). Working with OS staff and advised by specialists, the material was appraised, and determined what would be kept, and where. Public access to the International Library in Ordnance Survey head office ceased in March 2003.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. This collection is predominately held by the Royal Geographic Society with the Institute of British Geographers (RGS-IBG), with additional records held by The National Archives. Royal Geographic Society with the Institute of British Geographers The example map sheets are held with full supporting records. Directorate of Overseas Surveys staff lists In 1957, DCS was renamed the Directorate of Overseas Surveys (DOS) to reflect the independence of many former Colonies. Some non-Commonwealth countries such as Ethiopia, Liberia, Sudan, and Yemen Arab Republic were mapped by DOS between 1975 and 1991.

The Roman roads in Britain were, with Roman aqueducts, and the Roman army, [1] one of the most impressive features of the Roman Empire in Britain. 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. During the 1970s, government reviewed the DOS’ purpose. Then, in 1984, the organisation was merged with Ordnance Survey and given a new title: Overseas Surveys Directorate, OS (OSD).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. Although most of the maps are topographic, there are significant holdings of geological and land use mapping. Other thematic maps include climate, soils, and population. The Directorate of Overseas Surveys (DOS) book collection was merged with the Ordnance Survey Library’s collection in 1987. It has since been withdrawn from the library and has relocated to other institutions under the direction of the National Archives.