THE MAPPING OF HONG KONG
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sheets would be part of an overall series at 1/4800 scale which will eventually cover the whole of the New Territories in about 100 sheets. From these sheets another special series of 9 sheets at 1/9600 scale (800 ft. to 1 inch) was produced for certain areas for town-planning purposes.
In addition to the plans produced from the 1964 high-level photography, air-photo mosaics have been produced at 1/25,000 scale which cover the whole Colony. These are in 12 sheets and together form a mosaic about 6 feet square.
TOPOGRAPHIC Maps
The need for an up-to-date series of topographic maps of the Colony was realised soon after the war. Whereas the large-scale plans produced by the Crown Lands and Survey Office are essential for detailed planning, land administration, etc., they are of little interest to the average person who needs a coloured map to find his way around the Colony by road or for walking in the countryside.
A series of maps at a scale of 8 inches to one mile, with 50 ft. contours, had been produced in 1904, surveyed by the Royal Engineers in 1902-03 and printed in England by the Ordnance Survey. These had been revised, partially at least, in 1924 and re-printed by the War Office (GSGS, No. 3749) but it is not known whether in fact this series covered the whole Colony. The index diagram on the sheets remaining in the Crown Lands and Survey Office indicates that 21 sheets covered Kowloon and the eastern part of the New Territories.
In the post-war years the only topographic maps available until recently were the military series (GSGS, No. L8811) at 1/25,000 scale and (L681) at 1/100,000 scale. These were based on the pre-war 1/20,000 and 1/80,000 series respectively. The former was produced in 1929-31 and was one of the first military maps to be plotted from air photographs; in this case taken by the R.A.F. in 1925. Although a certain amount of spasmodic revision had been undertaken since the war, the sheets were generally very much out of date.
Until 1962 these maps had not been available to the public but in that year their security restriction was lifted and they were put on sale by Messrs. Kelly & Walsh Ltd. in Hong Kong, and
THE MAPPING OF HONG KONG
135
sheets would be part of an overall series at 1/4800 scale which will eventually cover the whole of the New Territories in about 100 sheets. From these sheets another special series of 9 sheets at 1/9600 scale (800 ft. to 1 inch) was produced for certain areas for town-planning purposes.
In addition to the plans produced from the 1964 high-level photography, air-photo mosaics have been produced at 1/25,000 scale which cover the whole Colony. These are in 12 sheets and together form a mosaic about 6 feet square.
TOPOGRAPHIC Maps
The need for an up to date series of topographic maps of the Colony was realised soon after the war. Whereas the large-scale plans produced by the Crown Lands and Survey Office are essential for detailed planning, land administration, etc., they are of little interest to the average person who needs a coloured map to find his way around the Colony by road or for walking in the countryside.
A series of maps at a scale of 8 inches to one mile, with 50 ft. contours, had been produced in 1904, surveyed by the Royal Engineers in 1902-03 and printed in England by the Ordnance Survey. These had been revised, partially at least, in 1924 and re-printed by the War Office (GSGS, No. 3749) but it is not known whether in fact this series covered the whole Colony. The index diagram on the sheets remaining in the Crown Lands and Survey Office indicates that 21 sheets covered Kowloon and the eastern part of the New Territories.
In the post war years the only topographic maps available until recently were the military series (GSGS. No. L 8811) at 1/25,000 scale and (L681) at 1/100,000 scale. These were based on the pre-war 1/20,000 and 1/80,000 series respectively. The former was produced in 1929-31 and was one of the first military maps to be plotted from air photographs; in this case taken by the R.A.F. in 1925. Although a certain amount of spasmodic revision had been undertaken since the war, the sheets were generally very much out of date,
Until 1962 these maps had not been available to the public but in that year their security restriction was lifted and they were put on sale by Messrs. Kelly & Walsh Ltd. in Hong Kong, and
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