Topographical drawing and sketching : including applications of photography (1888)
Reed, Henry A. (Henry Albert), 1844-1930 author · New York : John Wiley & Sons, 15 Astor Place · leaf 252
angents ; therefore first plot the bearing of 0 ; then protract VAo, and the side A V will intersect the given arc at the tangent-point required. III. In the case of confined space on the plotting-sheet : when the plotted station is near the border of the sheet, it may happen that the usual… … AV is the direction of OP, and HH falls without the border. With Az> — \ or f . . . . of AV, as a radius, describe the interior concentric arc; at v, construct the tangent hh' , — its length bearing the same ratio to HH' that Av does to AV: then with sector, pro- portional dividers, or otherwise,…
Topographical drawing · Photographic surveying
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
