Many of the photogrammetric Surveys carried out abroad were in Africa 
and Middle Eastern countries where the planning of roads, 
industrial sites called for topographic and volumetric surv 
1:500 and 1:100 000, ranging from 100 to 70 000 km? . 
pipelines and 
eys at scales between 
To undertake all these operations some 225 000 instrument hours were 
.Jyecorded on the photogrammetric instruments and a large staff of land 
Surveyors were continuously occupied in the UK and overseas, 
HYDROGRAPHIC DEPARTMENT, Ministry of Defence (Navy) 
Photogrammetry is used within the Department to assist the surveyor in the 
field and to update the current Admiralty charts. More specialized tasks 
include aerial triangulation, 
Accuracies comparable with 
those of conventional marine surveys have been 
obtained. 
INSTITUTE OF GEOLOGICAL SCIENCES LONDON 
The Photogeological Unit, Overseas Division, 
Institute of Geological 
Sciences, London, 
has carried out photogeological and geological surveys as 
technical aid to developing countries under the auspieces of Overseas 
Development Administration, Foreign and Commonwealth Office, 
undertaken in Burma, British Honduras, Ecuador, 
Swaziland, Thailand and Turkey. 
Mapping was 
Guyana, Hong Kong, Peru, 
KEMPS AERIAL SURVEYS 
The ownership of this company passed to Air Holdings Ltd, in April 1970. 
Six Avro Anson aircraft are possessed. It has continued to carry out aerial 
surveys in the United Kingdom; in particular county photographic surveys and 
aerial surveys for the Department of the Environment, with particular 
reference to motorway construction. A number of its aircraft has also been 
engaged on work for the Ordnance Survey. 
LONDON UNIVERSITY. UNIVERSITY COLLEGE Dept. of Photogrammetry 
and Surveying 
During the period in question, the Department has been involved in three 
important archaeological projects. Firstly,the Silbury Hill project, which was 
largely sponsored and publicised by the British Broadcasting Corporation. This 
involved a large scale survey of the biggest prehistoric man-made mound in 
Europe and the surrounding area. Photography was commissioned from 
Meridian Airmaps Ltd. ground control points were pre-marked, anda 1:200 
scale survey with 0. 5 m contour interval was completed by December 1968. 
Secondly, there was the Butser Hill ancient farm survey. The Association 
for the Advancement of Science and the Council for British Archaeology had 
jointly proposed the establishment of pre-historic farming conditions on the 
slopes of the South Downs near Butser Hill in Hampshire. A preliminary 
survey, incorporating permanent survey marks, was carried out at a scale of 
1:1000 with 1 m contour interval. Meridian Airmaps Ltd. were responsible for 
photography in January 1971 and work was completed in August 1971, 
shoal water depth determination and beach profiling. 
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