16Tolerance of angular measurements

16 Tolerance of angular measurements

16 Tolerance of angular measurements

(1) The angular misclose must not exceed the lesser of—

(a) 10 seconds plus 10√n seconds, or

(b) 2 minutes.

(2) In subsection (1), “n” represents the number of traverse angular stations.

(3) If 2 surveyed lines shown on a survey plan have a common vertex and bearings, the accuracy of the included angle must be within the tolerance of—

where—

d is the length in metres of the shortest line.

Note—

The above formula is the angular displacement that results from 10mm + 50 parts per million of a length applied as an arc at 1 terminal, with the centre of the arc being the other terminal. The value of 206,265 is the conversion from radians to seconds of an arc.