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LAND, PUBLIC WORKS AND UTILITIES
Further studies on North Lantau were completed, redefining the potential areas for development with and without a replacement airport, and proposing population limits and broad concepts for the staging and timing of development. The Junk Bay Development Study, undertaken to facilitate the development of a new town at Junk Bay and to study the implications and development opportunities in the Sai Kung hinterland, was submitted to the government in June.
The study on harbour reclamations and urban growth served as part of a programme to co-ordinate overall planning, and to meet housing, transport, employment and other needs of the population. It included the possibility of further reclamation within the harbour area, the levelling of hills, and the scope for additional urban growth through the redevelop- ment of existing properties and development of new sites. The study also examined future use of the Hong Kong International Airport site at Kai Tak should the airport be relocated, and possible sites for additional container berths and associated port facilities.
Survey
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Major responsibilities of the Survey Division of the Lands Department include the revision and production of all topographical and special-use maps in Hong Kong, land title boundary surveys, geodetic surveys, large scale topographical mapping, and survey and draughting services for the Lands Division and other departments.
During the year, cadastral surveys for the alienation of Crown land, the acquisition of land for government projects, the allocation of land for government purposes and boundary re-establishment for existing lots to enable redevelopment, accounted for the bulk of the work in the urban areas. In the New Territories, cadastral surveys declined in the new towns, but there was a large increase in surveys for village housing in rural areas.
Revision and metrication of the 1:1 000 basic mapping series and production of the new New Territories 1:5 000 series continued as major tasks throughout the year, as did cyclic revision for all other mapping series. Various colour maps, including the Hong Kong Official Guide Map and several in the Countryside series, were reprinted. The final sheet of this series, covering the northeast New Territories, was published in May. Reprographic and cartographic services were provided for other government departments throughout the year, including the provision of special thematic maps for the Urban Council elections, country parks, civil aviation and a joint maritime communications project.
The geodetic sections continued the upgrading, extension and essential maintenance of the geodetic control networks, both horizontal and vertical, upon which all mapping, cadastral and engineering surveys in Hong Kong depend.
The division's photogrammetric unit carried out a full programme of large scale map- ping for essential development purposes as well as the continuing metrication of the basic mapping series. A magnetic tape recording unit plus an additional graphic terminal was acquired to improve the unit's capacity to process digital data taken from aerial photography for complex engineering and environmental studies, volumetric calculations for quarries and reservoirs, and for recording monuments and historical buildings. The air survey unit, with the continued assistance of the Royal Hong Kong Auxiliary Air Force, provided all mapping photography and carried out general purpose photography at various altitudes over the whole of the territory for revision and record purposes.
Computerisation of the division continued for the processing of field survey data, for automated plotting of survey record plans and large scale site plans, and for the automation of other survey activities, including volumetric surveys. The Lands Department Survey