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There were also 32 survey coolies receiving wages at rates varying from $8 to $11 per month according to service. Total wages for year $3,169.59.
3. Cost of Department.—As the survey office forms part of the Public Works Department and is accommodated in the same building, which is known as the Government Offices, there are numerous charges, such as those for lighting, heating, electric fans, &c., which cannot be stated. Omitting charges of such a nature, the following is a statement of the cost:
| Category | Cost | | --- | --- | | Salaries | $42,398.46 | | Conveyance Allowances | $3,524.88 | | Wages of Coolies | $3,169.59 | | Drawing materials and mounting plans | $1,239.18 | | Surveying Instruments | $1,393.86 | | Land Survey Contingencies (largely cost of advertising land sales, etc.) | $834.43 | | Miscellaneous Expenses | $811.81 | | Triangulation Survey of Colony | $374.09 | | Total | $53,746.30 |
Of this amount a sum of $698.88 was paid from the vote Triangulation Survey of Colony as the coolies were engaged exclusively on that work.
4. Trigonometrical Work.—As no survey of the Colony had been made since that carried out by Lieut. Collinson in 1845 (his plan contains many inaccuracies), it was decided in 1908 that a proper Ordnance Map should be built up on correct triangulation and this work was commenced early in 1909. During the year the triangulation was considerably extended chiefly to the West, North and North East of the Tai Po base. Thirty main and six minor triangulation stations were fixed in various parts of the Colony. Twenty-six of the main stations and the six minor stations being valued and closed. This brings the total number of triangulation stations up to sixty-six, connecting up with a survey which has been made of the Anglo-Chinese boundary along the coast of Deep Bay on the North West, with Sha Tau Kok on the North East and with Castle Peak on the West of the Colony.
The limit of error, viz., 9″ in any one triangle, has not been exceeded and all triangles have been worked in series of polygons, each polygon itself being closed to an error not exceeding 6″.
The area covered by the triangulation already completed is about 22 miles North and South by 8 miles East and West. The attached plan shows the amount of triangulation carried out and in progress.
5. Topographical Work.—The methods mentioned under this heading in last year's report have been adhered to and the average limit of error in the traverses made for plotting to the 200 ft.=1 inch has been about 1/4,500 while that for the 50 ft. 1 inch map has not exceeded 1/5,000, both of which are well within the limits...
Page 73
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There were also 32 survey coolies receiving wages at rates vary- ing from $8 to $11 per month according to service. Total wages for year $3,169.59.
3. Cost of Department.-As the survey office forms part of the Public Works Department and is accommodated in the same build- ing, which is known as the Government Offices, there are numerous charges, such as thuse for lighting, heating, electric fans, &c., which cannot be stated. Omitting charges of such a nature, the following is a statement of the cost:
Salaries,
Conveyance Allowances,
Drawing materials and mounting plans,... Surveying Instruments,...
.$ 42,398.46
3,524.88
Wages of Coolies,
3,169.59 *
1,239.18
1,393.86
Land Survey Contingencies (largely cost
of advertising land sales, etc.),
834.43
Miscellaneous Expenses,
811.81
Triangulation Survey of Colony,
374.09
Total,
.... 53,746.30
Of this amount a sum of $698,88 was paid from the vote Triangulation Survey of Colony as the coolies were engaged exclusively on that work.
4. Trigonometrical Work.--As no survey of the Colony had been made since that carried out by Lieut. Collinson in 1845 (his plan contains many inaccuracies), it was decided in 1908 that a proper Ordnance Map should be built up on correct triangulation and this work was commenced early in 1909. During the year the triangulation was considerably extended chiefly to the West, North and North East of the Taipo base. Thirty main and six minor triangulation stations were fixed in various parts of the Colony. twenty-six of the main stations and the six minor stations being valued and closed. This brings the total number of triangulation stations up to sixty-six, connecting up with a survey which has been made of the Anglo-Chinese boundary along the coast of Deep Bay on the North West, with Sha Tau Kok on the North East and with Castle Peak on the West on the Colony.
The limit of error, viz., 9" in any one triangle, has not been exceeded and all triangles have been worked in series of polygons, each polygon itself being closed to an error not exceeding 6′′
The area covered by the triangulation already completed is about 22 miles North and South by 8 iniles East and West. The attached plan shews the amount of triangulation carried out and in progress.
5. Topographical Work.-The methods mentioned under this heading in last year's report have been adhered to and the average limit of error in the traverses made for plotting to the 200 ft.=1 inch has been about 1/4,500 while that for the 50 ft. 1 inch map has not exceeded 1/5,000, both of which are well within the limits
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