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 475
s, X A, X B, etc. Thenconsider the field as made up of triangles which have their verticesat X. In each of them two sides and the included angle will begiven to find its content. If Y be then taken for the common ver-tex, a test of the former work will be obtained. The operation will be somewhat… … PLANE SURFACES. 461 XY, from which all the corners of the field can be seen. Taketheir bearings, or the angles between the base-line and their direc-tions. The distances from X and Y to eachof them can be calculated as in the lastarticle. The figure will then show in whatmanner the content of the…
Surveying
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