18 
SECTION 3 
RESEARCH AND DEVELOPMENT OF EQUIPMENT AND METHODS 
During the period communication between researchers has been fostered by the 
publication of the "Directory of Research and Development Activities in the 
United Kingdom in the fields of Land Survey, Geodesy, Photogrammetry 
and Hydrographic Surveying" (56). This publication was compiled by 
I J Dowman of University College London and sponsored jointly by the 
Photogrammetric Society and the Royal Institution of Chartered Surveyors. 
A number of developments have been omitted from this section because they 
are adequately covered by entries in the preceding sections. 
ADDENBROOKES HOSPITAL 
The Medical Photography and Illustration Service of the Hospital has continued 
its development of photogrammetric procedures for the study of the human 
face (13). A collimated datum frame has been added to the portable stereo- 
metric camera designed at the hospital, to enable measurements to be made 
from printouts of the stereopairs with superimposed millimetre grids. 
UNIVERSITY OF BIRMINGHAM, Department of Civil Engineering 
Work is proceeding on the development of apparatus whereby, by the use of 
mirrors, two images of a bubble may be formed on a single photographic plate. 
Measurements of the shape of the bubble will be used to apply Prandtl's 
membrane analogy between equations describing the distribution of shear 
stress in a section in torsion. 
CARTOGRAPHIC ENGINEERING LIMITED 
The CP1 Plotter shown at the Twelfth Congress in Ottawa is now in series 
production (109, 140, 143). Sales have been made all over the world in both 
commerical and educational fields. CPl development work is now in hand to 
incorporate low cost digital recording equipment for the production of digital 
maps. Design and development is now complete on the EMPD 2, a specialist 
plotting device enabling contours and cross sections to be drawn from 
stereo electron micrographs (24, 25). Production of this instrument will 
begin in 1976. The Company has taken over the design and development of 
photogrammetric instruments formerly produced by Hilger & Watts. These 
are the radial line plotter, stereosketch, mirror stereoscope and scanning 
stereoscope. Detailed design improvements have been introduced to these 
instruments and they are all in series production. 
THE CITY UNIVERSITY, Department of Visual Science 
Research has been carried out in monocular and binocular visual perception 
and stereoscopic vision as applied to photogrammetry, aimed at the development 
of techniques and instrumentation for practical investigation of significant 
visual anomalies (14). 
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