A treatise on surveying, comprising the theory and the practice (1906)
Gillespie, William Mitchell, 1816-1868, Staley, Cady, 1840- · New York D. Appleton · leaf 126
s.The second method contains very convenient exj^ressions for use onthe small arcs ordinarily found in most triangulation. When the arc between the two stations reaches about 2° inlength the second method is not sufficiently accurate, and thedirect method must be employed. It has been very… … The second method was originally developed by Puissant( Traite de Geodesic, par L. Puissant, troisieme edition, tome i,1842), and the following is but slightly different from his de-velopment : Fig. 462 represents an ellipse, and we have the known relations a — h 6 = a^-W a a where a is the major…
Surveying
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