1/4800 scale of the New Territories were plotted by the Contractors direct from the smaller scale air photography taken in December 1964. Two more special planning base maps at 1/9600 scale were produced by reduction of the 1/4800 scale series. Statistical details are given at Appendix W.
(iii) Revision of plans
The major task of revising the many hundreds of large scale plans is now in hand. Two officers from the Division (one Land Surveyor and one Surveying Assistant Class I) were sent to Britain in April for a six-month training attachment at the Directorate of Overseas Survey and the Ordnance Survey Department to study the methods of rapid field revision used in Great Britain. They are now instructing other staff of the Survey Division in these methods, while undertaking a complete revision of the large scale plan of Hong Kong Island.
(iv) Topographical Maps
Production of the topographic maps now being produced by the Directorate of Overseas Surveys was accelerated. Advance plots of each sheet at 1/10,000 scale are sent to Hong Kong for field completion by the Division. During the year, a total of 30 sheets were received and 22 were completed and returned to the Directorate for fair drawing. Negative-proofs of seven printed sheets were received for comments and returned to the Directorate for minor amendments and final printing. The first three sheets of the series were printed, and a few advance copies sent from the United Kingdom by air. Bulk supplies for Government use are being consigned by sea and should be available in a few months. In due course, supplies will be available to the public from local booksellers.
Title Survey
6.17. In keeping with the low pace of private development, the demand for the setting out of new lot boundaries and dimensioned plans has not been great.
Cartography
6.18. The cartographic work in connection with air surveys has continued to occupy a large part of the drawing office staff. Production of plans, prints, photographs, etc. has continued to rise, largely as the result of the
71
1/4800 scale of the New Territories were plotted by the Con- tractors direct from the smaller scale air photography taken in December 1964. Two more special planning base maps at 1/9600 scale were produced by reduction of the 1/4800 scale series. Statistical details are given at Appendix W.
(iii) Revision of plans
The major task of revising the many hundreds of large scale plans is now in hand. Two officers from the Division (one Land Surveyor and one Surveying Assistant Class I) were sent to Britain in April for a six month training attachment at the Directorate of Overseas Survey and the Ordinance Survey Department to study the methods of rapid field revision used in Great Britain. They are now instructing other staff of the Survey Division in these methods, while undertaking a complete revision of the large scale plan of Hong Kong Island.
(iv) Topographical Maps
Production of the topographic maps now being produced by the Directorate of Overseas Surveys was accelerated. Advance plots of each sheet at 1/10,000 scale are sent to Hong Kong for field completion by the Division. During the year a total of 30 sheets were received and 22 were completed and returned to the Directorate for fair drawing. Negative-proofs of seven printed sheets were received for comments and returned to the Directorate for minor amendments and final printing. The first three sheets of the series were printed and a few advance copies sent from the United Kingdom by air. Bulk supplies for Govern- ment use are being consigned by sea and should be available in a few months. In due course supplies will be available to the public from local booksellers.
Title Survey
6.17. In keeping with the low pace of private development, the demand for the setting out of new lot boundaries and dimensioned plans has not
been great.
Cartography
6.18. The cartographic work in connection with air surveys has continu- ed to occupy a large part of the drawing office staff. Production of plans, prints, photographs etc. has continued to rise, largely as the result of the
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