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 283
s if the sides were parallel,dividing the given content by thebase AB. The quotient will bean approximate breadth, CE, orD F ; too small if the sides con-verge, as in the figure, and viceversa. Measure CD. Calculatethe content of ABDC. Dividethe difference of it and the required content by C D. Set… … 409. When the field is given by bearings, deduce from themthe angles at A and B. The required sides willthen be given by these formulas : /(A B, _ 2xABCD.sin. (A+B)\ V \ sir* A oin Ti / * Fig. 287. CD AD = (AB-CD) sin. A . sin. Bsin. B
Surveying
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