plied by the air survey contractor. At the end of the year the field checking of the 1/600 scale projects was almost completed and the checking of 1/1200 scale sheets of Lantau Island had commenced. On the mainland, checking was concentrated on the 1/1200 scale sheets in the Yuen Long and Fanling areas.
Revenue Survey
5.18. Work has continued at a steady pace.
Surveys for Government Projects
5.19. There has been a steady expansion in the demand for large scale site surveys for Government projects and the subsequent setting-out of earthworks, piling, buildings, etc. In addition an increasing number of check surveys on large site formation contracts has been required in connexion with interim payments to contractors: survey parties have had to be diverted from other tasks to meet this demand.
Survey Computations
5.20. The experiment undertaken last year to use an Anita electronic calculating machine with a Junior Machine Operator to check survey computations has proved successful. It has saved a considerable amount of the time of Surveying Assistants and a second machine of the same type has been ordered.
Air Survey
5.21. For another year a considerable proportion of the Survey Division's work was in connexion with the $6 million Air Survey contract commenced in 1963. The Division provides all ground control required by the contractors and carries out the field checking of machine plots, both detail and contour. It also provides name sheets to incorporate in the final prints.
5.22. A special series of sheets covering the greater part of the New Territories at a scale of 1/4500 (400' to 1″) and 1/9000 (800′ to 1″) was produced for planning and development purposes from the 1964 air photography. The 30 sheets of this series were checked and completed in the field.
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plied by the air survey contractor. At the end of the year the field checking of the 1/600 scale projects was almost completed and the checking of 1/1200 scale sheets of Lantau Island had commenced. On the mainland, checking was concentrated on the 1/1200 scale sheets in the Yuen Long and Fanling areas.
Revenue Survey
5.18. Work has continued at a steady pace.
Surveys for Government Projects
5.19. There has been a steady expansion in the demand for large scale site surveys for Government projects and the subsequent setting-out of earthworks, piling, buildings, etc. In addition an increasing number of check surveys on large site formation contracts has been required in connexion with interim payments to contractors: survey parties have had to be diverted from other tasks to meet this demand.
Survey Computations
5.20. The experiment undertaken last year to use an Anita electronic calculating machine with a Junior Machine Operator to check survey computations has proved successful. It has saved a considerable amount of the time of Surveying Assistants and a second machine of the same type has been ordered.
Air Survey
5.21. For another year a considerable proportion of the Survey Division's work was in connexion with the $6 million Air Survey con- tract commenced in 1963. The Division provides all ground control required by the contractors and carries out the field checking of machine plots, both detail and contour. It also provides name sheets to incor- porate in the final prints.
5.22. A special series of sheets covering the greater part of the New Territories at a scale of 1/4500 (400' to 1′′) and 1/9000 (800′ to 1′′) was produced for planning and development purposes from the 1964 air photography. The 30 sheets of this series were checked and com- pleted in the field.
60
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