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 466
triangulation, the unobserved angle ought to be nearly a rightangle. PLANE SURFACES,Fig. 60S. 451 … 452 TRIANGULAR SURVEYING. To extend the triangulation, by continually increasing the sidesof the triangles, without introducing ill-conditioned triangles,may be effected as in Fig. 502. A B is the measured base, C and Dare the nearest stations. In the triangles ABC and A B D, all theangles being…
Surveying
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