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NINTH INTERNATIONAL CONGRESS 
OF PHOTOGRAMMETRY, 1960 
BRITISH NATIONAL REPORT 
THIS REPORT covers the period between the Eighth International Congress of Photogrammetry 
held in Stockholm in 1956 and 31st December, 1959. 
1. Introduction 
(Introduction) 
(Einleitung) 
Photogrammetry has been used in the production of topographical surveys in Great Britain 
by the Ordnance Survey, in British Overseas Territories by the Directorate of Overseas 
Surveys and in various parts of the world by the Directorate of Military Survey. Commercial 
companies have carried out contract work both at home and overseas. Photogrammetry 
has also been used for non-topographic purposes such as road safety research and guided 
missile development. 
2. Survey Operations 
(Travaux Cadastraux et Topographiques) 
(Vermessungunterrehmungen) 
THE ORDNANCE SURVEY of Great Britain is producing a series of uncontoured plans of 
urban areas at a scale of 1:1,250 and has also made good progress on the resurvey of the 
mountain and moorland areas of the country at a scale of 1:10,560 with contours at a vertical 
interval of 25 feet. The Department carries out all stages of the air survey operations 
including flight planning and photography, aerial triangulation (where it is required) and 
the actual plotting. The Ministry of Aviation supplies the aircraft which are used and the 
Decca navigation system guides the pilot along the flight lines which have been computed 
in the flight planning. 
So far 4,058 sq. kms. of 1:10,560 resurvey and 370 sq. kms. of 1:1,250 resurvey have been 
plotted in air survey machines. Air photography taken during the period of the Report has 
included 1,337 sq. kms. at the scale of 1:4,800 for 1:1,250 plotting; 16,342 sq. kms. at the scale 
of 1:24,000 for 1:10,560 work and 1,069 miles of coast line for tidal survey. Williamson F.49 
cameras fitted with reseaux and Ross 6-3" or 12” focal length lenses are used. 
The technique of analytical aerial triangulation being used by the Department (1, 9) has 
been continuously developed over the past four years. It incorporates use of the DEUCE 
electronic computer at the National Physical Laboratory and a Jerie I.T.C. Analogue 
Computer (12) for final block adjustment in both plan and height. 
Work is also being carried out on the cyclic tidal resurvey of the country, where plotting 
is done by graphical methods from infra red photography and on the contouring of 1:10,560 
sheets which have been derived from basic surveys at larger scales. 
Photogrammetric equipment being used includes eight Thompson-Watts, four Santoni and 
nine Wild plotters, and five Cambridge stereocomparators. 
THE DIRECTORATE OF MILITARY SURVEY, WAR OFFICE AND AIR MINISTRY, has completed 
topographical mapping at scales from 1:25,000 to 1:100,000 employing photogrammetric 
methods which included multiplex plotting and bridging, slotted template and stereo- 
templates for area solutions. 
A total of 109,000 square miles was covered in Africa, the Arabian peninsula and Malaya. 
The Renfrew Test area in Canada was plotted on the Kelsh plotter for the International 
Society of Photogrammetry at a scale of 1:25,000 using wide angle photography of a contact 
scale of 1:50,000. A contract was made with Fairey Air Surveys Ltd. to supply contours of 
17,000 square miles of the Aden Protectorate using the Airborne Profile Recorder. 
Analytical aerial triangulation by Cambridge stereocomparator and electronic computing 
was employed to assist the Ministry of Supply in tests of various navigational aids. 
Experiments and user trials were carried out to assess the potential for military use of a 
number of instruments and techniques; these included trials of 1st, 3rd and 4th order plotters, 
use of convergent obliques, accuracy tests of stereotemplates and the development of aerial 
triangulation techniques using independantly observed models. 
THE DIRECTORATE OF OVERSEAS (GEODETIC AND TOPOGRAPHICAL) SURVEYS undertakes 
survey and mapping in British Overseas Territories and during the past four years some 
138,000 square miles of planimetry with 32,000 square miles of contouring or formlining have 
been produced at scales of 1:200,000 to 100,000; 148,000 square miles of planimetry with 
81,000 square miles of contouring or formlining at a scale of 1:50,000 have been produced of 
Africa, the Far East and the West Indies and 1,292 square miles of planimetry together with 
2,521 square miles of contouring or formlining have been completed at a scale of 1:25,000 or 
larger.