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DIRECTORATE OF OVERSEAS SURVEYS 
The Directorate has continued to investigate the accuracy of aerial triangulation 
by the observation of independent models, particularly the method of calculating 
perspective centre co-ordinates (65, 66, 108). 
After considerable experimentation and modification, Multiplex equipment was 
used to produce 1:250 000 scale mapping of Antarctica from tricamera photo- 
graphy. Direct contouring of each model resulted in a high contour accuracy 
for this type of 1:250 000 mapping (136, 137). 
Other new developments incorporated into production methods include the use 
of closed circuit television on Wild A8s to assist the operator in map revision 
and plotting, direct scribing of contours on Wild A8s and B8s and Kern PG2s, 
and the production of high quality dense pencil plots on Kodagraph from which 
dyeline copies can be produced directly. 
UNIVERSITY OF GLASGOW, Department of Geography 
Work has continued on the testing of orthophotographs (91), though the results 
have not always been satisfactory. The work on digitised parallax measurements, 
digitising for cartographic purposes (118) and mapping from satellites has also 
continued (119, 120). 
New work has included the testing of Russar super-wide angle photography (85) 
and the analysis of errors inherent in reconnaissance photography, especially 
those caused by focal plane shutters, image movement compensation, etc. In 
this connection, the suitability of the CP1 Cartographic Plotter (owned by 
Dundee College of Technology) for photography taken with RAF long-focus 
cameras is also being tested. Another item has been the detection of airflow 
patterns from photogrammetric measurements of blown timber (147). 
The programming of simultaneous block adjustment by independent models in 
ALGOL for use on ICL 1900 series computers has just been completed, and is 
now running on a 1906A machine at the University of Nottingham. 
GUY'S HOSPITAL, Department of Paediatrics 
A technique has been developed for recording and measuring the shape of a 
child's face so that attempts may be made to identify certain facial patterns 
that are suspected to be present as a result of disease. It is a modified 
version of the light sectioning technique evolved at the Royal Aircraft 
Establishment. A contribution has been made towards solving the problem 
of rigidly positioning the head. 
HUNTING SURVEYS LIMITED 
An investigation into the cartographic applications of LANDSAT imagery was 
carried out for NASA, which has led to the successful production of topographic 
mapping at scales up to 1:250 000 and annotated photomaps both in black and 
white and in colour from this imagery. A second investigation into the