A treatise on land-surveying; comprising the theory developed from five elementary principles; and the practice with the chain alone, the compass, the transit, the theodolite, the plane table, &c. Illustrated by four hundred engravings, and a magnetic chart (1875)
Gillespie, W. M. (William Mitchell), 1816-1868 · New York, D. Appleton · leaf 301
-^n Cf^:^ iquired distance to (436) Problem. Three points, A, B, C, being given by theirdistances from each other, and two other points, P and Q, beingso situated that from each of theyn two of the three points can beteen and the angles APQ, BPQ, CQP, BQP, be measured, it isrequired to determine… … 294 OBSTACLES IN ANGULAR SURVEYIIVO. [part vii Construction. Begin,as in Art. (397), hj describ-ing a circle passing throughA and B, and having the cen-tral angle subtended by AB,equal to twice the given an- p^-—gle APB. and thus contain-ing that angle. The point ^v,^ ^v^^,- ,yP will lie somewhere…
Surveying
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