Title Survey
7.30 The heavy demand for boundary surveys continued throughout the year under review. Arrears of work for lease and surrender plans were considerably reduced due to the employment of additional survey parties on this type of work.
7.31 Experienced Surveying Assistants were used to carry out precise boundary surveys adjoining the proposed Mass Transit line in order that building development should not conflict with the proposed scheme.
Local Air Survey
7.32 Approval was given during the year for the purchase of an R.C. 10 air survey camera in conjunction with the purchase by the R.H.K.A.A.F. of a twin-engined 'Islander' aircraft. The camera was delivered in January 1972 and was test flown soon after the arrival of the aircraft in March. The preliminary tests show that a high standard of vertical photography can be obtained using the automatic regulator attached to the camera, and it is expected that early use will be made of this photography for plotting purposes.
7.33 Details are being finalized on the draft of a new air survey mapping contract which will include items for the plotting of engineering works, including volumetric work.
Cartography
7.34 Production of the new edition 1/2,400 plans continued to schedule and during the year 23 plans were completed, and only a few inactive areas of minor importance remain uncompleted in this series. A limited revision programme was commenced in the last quarter of the year for sheets covering areas of major development.
7.35 The 1/2,400 series was also used, by direct photographic reduction, to compile a 1/4,800 series. 12 sheets were produced in this way to cover active areas and are designed in overlapping combinations so that the chosen sheet is suitable for virtually any area of interest.
7.36 The 8 inches to 1 mile series was again revised but design is now in hand to consider the feasibility of a metric, dual language version at a scale of 1/10,000 (about 6 inches to 1 mile).
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Title Survey
7.30 The heavy demand for boundary surveys continued through- out the year under review. Arrears of work for lease and surrender plans were considerably reduced due to the employment of additional survey parties on this type of work.
7.31 Experienced Surveying Assistants were used to carry out precise boundary surveys adjoining the proposed Mass Transit line in order that building development should not conflict with the pro- posed scheme.
Local Air Survey
7.32 Approval was given during the year for the purchase of an R.C. 10 air survey camera in conjunction with the purchase by the R.H.K.A.A.F. of a twin-engined 'Islander' aircraft. The camera was delivered in January 1972 and was test flown soon after the arrival of the aircraft in March. The preliminary tests show that a high standard of vertical photography can be obtained using the automatic regulator attached to the camera, and it is expected that early use will be made of this photography for plotting purposes.
7.33 Details are being finalized on the draft of a new air survey mapping contract which will include items for the plotting of engineer- ing works, including volumetric work.
Cartography
7.34 Production of the new edition 1/2,400 plans continued to schedule and during the year 23 plans were completed, and only a few inactive areas of minor importance remain uncompleted in this series. A limited revision programme was commenced in the last quarter of the year for sheets covering areas of major development.
7.35 The 1/2,400 series was also used, by direct photographic reduction, to compile a 1/4,800 series. 12 sheets were produced in this way to cover active areas and are designed in over-lapping com- binations so that the chosen sheet is suitable for virtually any area of interest.
7.36 The 8 inches to 1 mile series was again revised but design iş now in hand to consider the feasibility of a metric, dual langugae version at a scale of 1/10,000 (about 6 inches to 1 mile).
85
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