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 293
.4-6357 chains. 422. To part off any Figure. Let it be required to part off from a field a certain area bv a line Fig 299 passing through a given point P within the field. Eun aguess - line A B through P.Calculate the area which itparts off. Call the differencebetween it and the requiredarea = d.… … PARTING OFF LAND. 279 duction from bearings. Measure P A and P B. Then the desired angle P will be given by the following formula: / A P2 —. V> V\ Cot. P = - i (cot. A + cot. B - ^~Yd^) ± r /A P3 . cot. B-BF. cot. A . . _ , W 2d cot. A. cot. B + t(cot.A+cot.B-Apa2-BF)T If the guess-line be run…
Surveying
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