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 412
= S-90° 1-71 In order to introduce the value of C into equation (2), we mul-tiply it by the sine of 1, to reduce arc to linear measure. COMPOUND ANGULAR LEVELING. 397 Then we haveBB=tE(S^)>-90T|l + i(^)2(S-90°)f. [18.] COMPOUND ANGULAR LEVELING. 590. The following problems may mostly be reduced… … 591. By An-gular Co - ordi-nates in onePlane. Take twostations, A and D, in the same vertical plane with B. At A observe the anglesof elevation of B and D. Measure AD, At D observe the angleA D B. Then, in the triangle A B D we get A B, and in the tri-angle B A 0 we get B C. sin. BDA. sin. BAC…
Surveying
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