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wide range, namely from 1:500 to 1:50 000. Projects worth noting are 
stereoscopic survey cover for the counties of Berkshire 1:10 000, 
Derbyshire 1:12 000, Glamorgan 1:5000, Northamptonshire 1:12 000, and 
Nottinghamshire 1:12 000, The areas of at least six proposed new towns were 
also photographed. The whole drying out area of the Wash was photographed in 
true colour at 1:10 000 in a four-day period during low-water spring tidal 
conditions. 
Dealing now with mapping operations during the four years under review, 
over 450 separate surveys have been produced at scales ranging from 1:50 to 
1:50 000, amounting to a total area of mapping of approximately 56 000 km, 
The vast majority of the work has been based on aerial photography and 
photogrammetric mapping. The projects have been for countries all over the 
world, including the United Kingdom, Gibraltar, Malta, Libya, West Africa, 
Zambia, Cyprus, the Trucial States, Saudi Arabia, Burma, Singapore, 
Malaysia, South America, Honduras and Jamaica. 
The larger scale mapping contracts, in the range 1:50 to 1:2500, were 
mainly in the United Kingdom and included 1:500 scale surveys for over 225 
route km of proposed new motorways or existing road improvements. Other 
large scale surveys in the UK included work for different civil engineering 
projects such as land reclamation, reservoir construction, building and so on. 
The most extensive surveys carried out in the period include 1:2500 scale 
mapping of the whole of Singapore and Gibraltar; 1:1000 mapping of copper mining 
areas in Zambia; mapping and orthophotography production of two large 
irrigation, dam site and reservoir areas on the Sittang River in Burma at scales 
1:10 000, 1:2000 and 1:25 000 respectively; and mapping at 1:50 000, with 
orthophoto background, of 31 sheets in Saudi Arabia. 
GLASGOW UNIVERSITY. Dept. of Geography 
The Department of Geography, University of Glasgow, has continued its 
extensive programme of specialised thematic mapping, particularly glacier 
mapping - in Iceland (Fjallsjokull), Norway (Briksdalsbre) and Switzerland 
(Brenay and Otemma Glaciers). In addition, a series of specialised vegetation 
and geomorphological maps covering various national nature reserves in 
Scotland (Rhum, Forvie and Endrick) and in Northern Ireland (Dundrum), have 
been completed. 
HUNTING SURVEYS LTD 
In the period 1968-1971, Hunting Survey's aircraft flew approximately 
600, 000 km? of photographic cover for mapping, mosaicing and the study of 
resources, much of it in colour. 
Photography in the United Kingdom included cover of 10 counties at 1:12 000 
scale, some of which was commissioned specially for detailed study in 
connection with the National Census in 1971. 
Survey work carried out in the UK was mainly for highway design and urban 
development, particularly the former, where tenders are now let by the new 
road construction units formed in recent years. In this type of survey the digital 
ground model has supplemented and in some cases superseded contours.