A treatise on levelling, topography, and higher surveying (1876)
Gillespie, W. M. (William Mitchell), 1816-1868, Staley, Cady, b. 1840, ed · New York, D. Appleton and company · leaf 186
three angularpoints of each spherical tri-angle to be joined by straightlines, chords of the arc, so as toform a plane triangle, as inFig. 209. Eeduce the givencurved side to its chord, andthe spherical angles to theplane angles contained by thesechords. Compute the othersides or chords by plane… … 166 LEVELLING, TOPOGRAPHY, AND HIGHER SURVEYING. To reduce an angle of a spherical triangle to the corre-sponding angle between the chords of the including arcs : Let ABC, Fig. 210, be a spherical triangle, and O the centre of the sphere. It is required to reduce the spherical FiQ 210 angle at A to…
Surveying
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