10 
SECTION 3 
NON TOPOGRAPHICAL OPERATIONS 
In some cases it has been a little difficult to decide whether items reported 
should come under this heading, or under section 4 dealing with research. 
ABERDEEN UNIVERSITY.Dept. of Geography 
Photography was taken with a Hasselblad 500 C camera of a portion of a 
near-vertical cliff face near Cape Wrath. At the time of photography full 
control was surveyed by theodolite intersection, of 6 orange markers suspended 
by vertical lines down the cliff face in two groups of three. Photography and 
surveying was carried out from a promontory facing the cliff at about 100 metres 
distance. The restricted length of the promontory allowed only one stereo- 
model. An experimental project to obtain metric and geographical/geological 
information about cliff faces is still at a preliminary stage. 
BKS SURVEYS LTD 
A number of photogrammetric surveys have been undertaken from 
photography obtained with a phototheodolite in connection with the restoration of 
historic buildings, and the integration of existing shopping facades of great 
character with new design concepts in urban renewal schemes. A micrographic 
division has been in operation since 1970. 
BUILDING RESEARCH STATION Garston Watford 
During 1969 a project was started to examine the behaviour of a deep ex- 
cavation in the Oxford clay. Photographs were exposed in the station's Wild P.30 
phototheodolite, and these were plotted by Hunting Surveys Ltd. The drawings 
were then used by the station to construct a transparent model at 1:250 to 
assist in the research. 
Another project was for the purpose of measuring the displacement of the 
surface of a rockfill dam. Photographs exposed by the station were analysed by 
Hunting Surveys Ltd in a Wild A7 Autograph with an EK5 readout to produce 
three dimensional co-ordinates of particular targeted points, and of changes in 
shape of the dam surface along particular profile lines. 
Photogrammetric studies have also been made of joint influence on the 
weathering of steep chalk faces and to determine joint disposition and material 
volume after slide failure in Oxford clay. In addition photogrammetry has been 
used for monitoring a deep steep rock cutting on the trans-Pennine motorway. 
Similar applications of photogrammetry to the station's work are envisaged. 
EDINBURGH UNIVERSITY School of Built Environment 
The school has used photogrammetry in connection with various 
archaeological studies (126, 127, 129, 130). 
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