Roman Britain (Historical Map and Guide): 7

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Almost all photography of Africa, Aden, Malaya, and Borneo flown between 1946 and 1953 was taken with Fairchild® K17 cameras, and from 1951 with Williamson F49 cameras, both using the same focal length of 152 mm. These were carried in aircraft (mainly Lancasters) of RAF photographic reconnaissance squadrons. The planned scale of photography was 1:30 000, selected as a compromise that would provide specialist departments (geology, forestry, agriculture) with photography that both enabled interpretation of thematic information, and suited topographic mapping.

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 It has since been withdrawn from the library and has relocated to other institutions under the direction of the National Archives. The DOS maps from the collection have been re-located to RGS-IBG, which now holds a complete set designated as The Ordnance Survey International Collection (OSIC) Map Archive. The National ArchivesIndividual trig stations and occasional bench marks are plotted, with heights, on DOS 1:125 000 and larger-scale mapping. International boundary survey data Great Britain 1:1,000,000 (in the style of the International 1/1M map). Sheet 1 (North), Sheet 2 (South) The MCCs, organised by 1:100 000 scale map sheet numbers (½˚ squares – technically not ‘square,’ but normally referred to as such), give current and superseded coordinates for every point that is plotted on the MCDs. This includes heights (ground level and station mark) and references to the files that contain its coordinates, station descriptions and photo identifications. Primary triangulation and traverse areas International boundary survey data, maps, correspondence, and files are held by The National Archives. It was Directorate of Overseas Surveys (DOS) practice to show international boundaries on the medium-scale mapping wherever well-defined, and there was enough information to be drawn without significant error. Portrayal of boundaries was agreed with countries concerned, and correspondence with national survey departments provided additional data.

They're filed under code AD rather than by individual country. Directorate of Overseas Surveys survey data catalogueMost of the photography used by DOS for mapping, including the RAF and contract cover, is indexed on record reference cover diagrams, generally at 1:500 000 scale. The written catalogue is a Roneodex card index, with one card per film recording: Records of field work by the Falkland Islands Dependencies Survey and the British Antarctic Survey, formerly held by the DOS Survey Data Library, are now held by the British Antarctic Survey, Cambridge. 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 Other agencies’ editions in series produced jointly by DOS, national mapping agencies and British Military Survey Four maps have been permanently preserved at The National Archives as typical examples of Directorate of Overseas Surveys (DOS) map production between 1946 and 1999:

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 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. 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 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. 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.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.