The theory and practice of surveying. Designed for the use of surveyors and engineers generally, but especially for the use of students in engineering (1886)
Johnson, J. B. (John Butler), 1850-1902 · New York, J. Wiley & sons · leaf 501
r Broken Base. If a and b are the two measured sides which make an angleof 1800 — 6, the correction to be added to a -f- b to get thedistance between their extremities, 6 being less than 50, andexpressed in minutes of arc, is ab*Cb= — 0.00000004231 . ,. 8. Correction to Sea-level. C--L- where L is… … to take a base-line across a stream or other obstruction to di-rect measurement. In such a case a station may be chosen GEODETIC SURVEYING. 473 as O in Fig. 131, and the horizontal angles A OB = P, BOC =Q, and COD = R measured. If the parts AB and CD lie inthe same straight line, and AB = a and CD…
Surveying
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