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 264
eof the desired line (or a latitude and departurehaving the same ratio), and the bearing anddistance corresponding to these will be theangle and distance desired. 371. By Similar Triangles. Through A measure any line C D. Take a point E, on the line CB,beyond the obstacle, and from itset off a… … Fig. 265. 372. By Triangulation. When obstacles prevent the precedingmethods being used, if a point, C, can be found from which A andB are accessible, measure the distancesC A, C B, and the angle A C B, andthence calculate the angle CAB.Then observe any angle A C D beyondthe obstacle. In the…
Surveying
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