Davies, Charles, 1798-1876 · New York, Cincinnati [etc.] American book company · leaf 311
tely the surface of the ground. This is done by drawinga system of small broken lines, as in the figure, perpendicularin direction to the horizontal curves already described. Inall topographical representations of undulating ground, thelines of shading are drawn perpendicular to the… … B d EXAMPLE SECOND. 338. The following example will illustrate the methods em-ployed in making a topographical survey, where great accuracyis required. By means of a transit or level, range a line of stakes A, B, C,D, E, &c., Fig. 156, along one side or through the middle of theground to be…
Surveying
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