A treatise on surveying, comprising the theory and the practice ; (1887)
Gillespie, W. M. (William Mitchell), 1816-1868, Staley, Cady, 1840- [from old catalog] ed · New York, D. Appleton and company · leaf 260
Fig. 259. 364. By Triangulation. Let A B be the line to be prolonged.Choose some station C, whencecan be seen A, B, and a point beyond the obstacle. Measure A B … 246 LAND-SURVEYING. and the angles A and B of the triangle ABC, and thence calculatethe side AC. Set the instrument at C, and measure the angleACD, CD being any line which will clear the obstacle. Let E bethe desired point in the lines A B and C D prolonged. Then inthe triangle ACE will be known…
Surveying
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