OSG Circular 1/1979

24 October 1979

Compilation of Surveys

When compiled plans for registration in the Central Plan Office are requested or can be utilised instead of actual survey, the following guidelines with respect to the required error of closure for the area compiled, are provided.

Where the area is compiled from surveys carried out prior to 1909, the error of closure must not exceed that of the original surveys and need not be greater than 1 in 600.

Where the area is compiled from surveys carried out between 1909 and 1946, in rural areas the error of closure must not exceed 1 in 600, and in towns must not exceed 1 in 1000.

Where the area is compiled from surveys carried out between 1946 and 1966, in rural areas the error of closure must not exceed 1 in 2000, and in towns must not exceed 1 in 4000.

Where the area is compiled from surveys carried out since 1966, the error of closure shall be in accordance with current regulations.

It is to be appreciated that surveys could be compiled from information extending over any of the above mentioned periods, and in those instances the maximum error of closure required shall apply.

If areas cannot be compiled to the required error of closure it is to be considered that unsatisfactory survey information prevents the compilation of the plan and a survey may be necessary.

Acting Chief Surveyor

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