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 49
d, would give the same content as the level base onwhich it may be supposed to stand, or as the figure which wouldbe formed on a level surface beneath it by dropping plumb-linesfrom every point of it. This method of procedure is required for both geometrical andsocial reasons. Geometrically, it is… … Fig. 32. Fig. 33. platted horizontally. Suppose the ground to slope in all directionsfrom the point C, which is the summit of a hill. Then the lines B C, D C, measured on the slope, arelonger than if measured on a level,and the field A BCD, of Fig. 30,platted with these long lines, wouldtake the…
Surveying
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