A treatise on levelling, topography, and higher surveying (1876)
Gillespie, W. M. (William Mitchell), 1816-1868, Staley, Cady, b. 1840, ed · New York, D. Appleton and company · leaf 152
anchored at various points between A and B, and thus newbase lines be formed, from the ends of which to triangulate topoints on the shore. CHAPTER II. SOUNDINGS. (209.) In a river or narrow water, the soundings may betaken in zigzag lines, from shore to shore, at equal intervalsof time, as in Fig.… … 134: LEVELLING, TOPOGRAPHY, AND HIGHER SURVEYING. (210.) On a Sea-coast. The position of the boat in thewater, when the soundings are taken, must be determined atregular intervals. This is done in various wavs. (211.) From the Shore. By observing with a compass ortransit to the boat from stations…
Surveying
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