Elements of surveying and levelling; with descriptions of the instruments and the necessary tables (1870)
Davies, Charles, 1798-1876 · New York and Chicago, A. S. Barnes & Company · leaf 214
o to shade the drawing that it may represent accu-rately 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. In alltopographical representations of undulating ground, the linesof… … Bd Example Secokd. 28. The following example will illustrate the methods em-ployed in making a topographical survey, where great accuracyis required. By means of a theodolite or level, range a line of stakesA, B, C, D, E, &c., along one side, or through the middle of theground to be surveyed,…
Surveying
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