A treatise on surveying, comprising the theory and the practice (1906)
Gillespie, William Mitchell, 1816-1868, Staley, Cady, 1840- · New York D. Appleton · leaf 399
e measured. To fix this point, S, on the plot containing A, B,and C, draw lines from A and B, making angles with A B eachequal to 90° — A S B. The intersection of these lines at 0 will bethe center of a circle passing through A and B, in the circumference 388 MARITIME OR HYDROGRAPEIC SURVEYING. of… … passing through B and C. The point S will lie somewhere in itscircumference, and therefore in its intersection with the former cir-cumference. The point is thus determined. In the figure the observed angles, A S B and B S C, are supposedto have been respectively 40° and 60°. The angles set off are…
Surveying
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