A traverse that fails its precision specification, and what to do about it
A four-sided traverse closes at 1:2,538 against a 1:10,000 requirement. The direction of the closure line points straight at the course carrying the blunder, which is remeasured and the traverse recomputed.
Apply· about 28 minutes by hand· 5 steps
Given
A closed-loop boundary traverse P-Q-R-S-P. Angles have already been adjusted and converted to bearings.
P-Q N 78°15′00″ E 512.98 ft
Q-R S 15°40′00″ E 399.82 ft
R-S S 77°50′00″ W 532.83 ft
S-P N 12°55′00″ W 402.84 ft
Station P is held at N 3000.00, E 4000.00.
The contract requires 1:10,000 linear precision.
The site is on a hillside; courses Q-R and R-S were measured with a hand-held tape over broken ground.
Required
The linear misclosure and the precision as computed.
Whether the traverse meets its specification.
The most likely source of the error, identified from the closure itself.
The recomputed traverse after the suspect course is remeasured at 531.96 ft.
Work it through yourself before reading on - the solution below shows every step, so there is no way to skim it without giving the answer away.
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