Roman Britain (Historical Map and Guide): 7

Product Information

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 RGS-IBG collection contains all series produced by the Directorate of Colonial Services (DCS) and its subsequent successors between 1946 and 1999. This includes:

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: 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. The final steps used concrete, which the Romans had rediscovered (it had been used in Ancient Egypt). They seem to have mixed the mortar and the stones in the fossa. First a small layer of coarse concrete, the rudus, then a little layer of fine concrete, the nucleus, went onto the pavement or statumen. Into or onto the nucleus went a course of polygonal or square paving stones, called the summa crusta. The crusta was crowned for drainage.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. Ordnance Survey of Great Britain, shewing military districts. Sheet 1 (North), Sheet 2 (Central), Sheet 3 (South) 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.

listed chronologically)• ca. 1852? - Diagram shewing the principal triangulation for the Ordnance Survey of Great Britain and Ireland. The directions for making pavements given by Vitruvius. The pavement and the via munita were identical in construction, except as regards the top layer. 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 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

History

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. 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).