(a) Control Survey. The provision of the rigid framework of fixed points, on both horizontal and vertical planes, on which all surveys are based: viz. triangulation stations; picket-boxes; traverse stations and level datum bench marks.
(b) Mapping Survey. Surveys for the preparation of plans and maps of the whole Colony at different scales and their subsequent revision at regular intervals.
(c) Title Survey (formerly known as Revenue Survey). The delineation and recording of all property boundaries in the urban areas and in planned areas of the New Territories; the implementation of all town planning layouts; surveys for surrenders, grants, sales, exchanges, Crown Leases, etc.
(d) Cartography. The production of plans and maps at different scales for both 'mapping' and 'title' purposes.
Control Survey
6.15. The main effort has continued to be in the provision of ground control points for the large scale mapping by air survey of the New Territories. Throughout the year survey parties have been working on this task in the Sai Kung peninsula and the north-eastern areas of the New Territories.
Mapping
6.16. (i) Large scale air survey
A large proportion of the survey staff continues to be employed on checking the machine plots of the large scale air survey being carried out by the contractors, Messrs. Hunting Surveys Ltd. The plots of Lantau Island are now being checked and to facilitate this work, office and living accommodation has been obtained at Cheung Sha. Other machine plots were checked on the mainland in the Tai Po/Fanling, Junk Bay/Hebe Haven and High Island areas. Mapping of the urban areas of Hong Kong Island, Kowloon and New Kowloon at 1/600 scale is now virtually complete. Statistical details of plans produced are given at Appendix W.
(ii) 1/2400, 1/4800 and 1/9600 scale series
From the large scale plans, sheets at 1/2400 scale of the urban areas were compiled by photographic reduction and sheets at
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(a) Control Survey. The provision of the rigid framework of fixed points, on both horizontal and vertical planes, on which all surveys are based: viz. triangulation stations; picket-boxes; traverse sta- tions and level datum bench marks.
(b) Mapping Survey. Surveys for the preparation of plans and maps of the whole Colony at different scales and their subsequent revi- sion at regular intervals.
(c) Title Survey (formerly known as Revenue Survey). The delineation and recording of all property boundaries in the urban areas and in planned areas of the New Territories; the implementation of all town planning layouts; surveys for surrenders, grants, sales, exchanges, Crown Leases, etc.
(d) Cartography. The production of plans and maps at different scales
for both 'mapping' and 'title' purposes.
Control Survey
6.15. The main effort has continued to be in the provision of ground control points for the large scale mapping by air survey of the New Territories. Throughout the year survey parties have been working on this task in the Sai Kung peninsula and the north-eastern areas of the New Territories.
Mapping
6.16. (i) Large scale air survey
A large proportion of the survey staff continues to be employed on checking the machine plots of the large scale air survey being carried out by the contractors, Messrs. Hunting Surveys Ltd. The plots of Lantau Island are now being checked and to facilitate this work, office and living accommodation has been obtained at Cheung Sha. Other machine plots were checked on the mainland in the Tai Po/Fanling, Junk Bay/Hebe Haven and High Island areas. Mapping of the urban areas of Hong Kong Island, Kowloon and New Kowloon at 1/600 scale is now virtually complete. Statistical details of plans produced are given at Appendix W.
(ii) 1/2400, 1/4800 and 1/9600 scale series
From the large scale plans, sheets at 1/2400 scale of the urban areas were compiled by photographic reduction and sheets at
70
age 94
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