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 302
like manner. Finally, in thetriangle BPQ, PQ can then be found. If desired, we can also obtain AP in the triangle APB ; and CQin the triangle CBQ. (437) Problem. Four points, A, B, C, D, being given inposition, hy their mutual distances and directions, and tivo otherpoints, P and Q, being so… … Construction. Begin as in the last artic.e, by descrit)ing onAB the segment of a circle to contain an angle equal to APB.From B draw a chord BE, making an angle with BA equal to thesupplement of the angle APQ. On CD describe another segmentto contam an angle equal to CQD. From C draw a chord…
Surveying
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