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During the period two more plotting instruments were added to Fairey Surveys Ltd 
capacity, namely a Zeiss (Jena) Stereometrograph E (based at Livingston) and a 
Wild B8S fitted with tri-axis locators. The company's digitisation capacity was 
also increased by the addition to the photogrammetric instruments of another 
co-ordinate registration device, the Wild EK22. A Wild PUG4 point transfer 
device was purchased. A mini computer, the Honeywell H. 316, was purchased 
by the company at the beginning of the four year period. 
GEOSURVEY INTERNATIONAL LIMITED 
Since the 1972 Congress there has been a marked increase in demand, which has 
resulted in the acquisition of new equipment for photogrammetry (including 
photomaps, mosaics and orthophotography), aerial photography, colour film 
processing, airborne geophysics and remote sensing. During the period, over 
150 000 negatives have been exposed for mapping at scales ranging from 1:500 to 
1:100 000, in aerial photographic operations throughout the UK, Africa and the 
Middle East. The acquisition of a Gates Lear Jet has, for special projects, 
increased operating altitudes for wide angle and super-wide angle photography. 
To aid navigation, a Doppler system and Sperry radio altimeters have been 
installed. 
UNIVERSITY OF GLASGOW, Department of Geography 
Thematic mapping by aerial photogrammetry has continued. Glacier mapping has 
been concentrated in Switzerland and Norway. A geomorphological map of Rhum 
at 1:20 000 scale has been published, as well as recreation and walking maps of 
the Cairngorms and in the Trossachs. A detailed photogrammetric map of the 
many stone circles around Callanish (Lewis) has been made in connection with 
the current controversy over megalithic astronomical observations. 
HUNTING SURVEYS LIMITED 
In the four year period since the last congress, the company has flown over 
400 000 km“ of air photography using Wild RC10 and RC8 cameras at altitudes 
up to 10 000 m and has also performed specialised tasks in remote sensing. 
Survey work undertaken in the UK has been mainly for urban and industrial 
development, highway and railway design. The majority of photogrammetric 
surveys carried out overseas were located in Africa and the Middle East (89) 
where the planning of roads, pipe lines, urban development, new ports and 
harbours and the need for basic maps called for surveys at scales varying from 
© 1:500 to 1:250 000, the latter being produced from LANDSAT imagery (105-107). 
To undertake this work over 20 photogrammetric instruments were used including 
Wild A10, A7, B8 and Thompson-Watts plotters and a Zeiss (Jena) Stecometer 
with digital readout. 
HYDROGRAPHIC DEPARTMENT, Ministry of Defence (Navy) 
Photogrammetry and remote sensing are used to assist both the work of the 
hydrographic surveyor and the task of up-dating nautical charts. More 
specialised applications include the heighting of drying banks and beaches, 
measurement of depth in shallow water and identification and plotting of under - 
water coral, rocks and other hazards to navigation (59). Equipment consists of 
one Wild A8 and one Wild B8, both linked to an EK22 data acquisition system.