A treatise on surveying, comprising the theory and the practice (1906)
Gillespie, William Mitchell, 1816-1868, Staley, Cady, 1840- · New York D. Appleton · leaf 406
ilinearmethod, given in Art. 817. 830. Between Stations. It is sometimes necessary to carry onsoundings without the use of range lines on the shore. In this casethe positions of the boat may be determined by any of the precedingmethods at any desired points in the water, and the soundings takenas… … kept in line by the use of the instrument shown in Fig. Ill, PartI. In Fig. 557 the two positions of the boat at the ends of theline are determined by the trilinear method. 831. Systems of Lines for Soundings. When great accuracy is desired, besides the lines at right angles to the shore other…
Surveying
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