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 560
the local mean time of transit of the star. GEODETIC SURVEYING. 531 Example.—Compute the local mean time of transit of e Eridani at St. Louison Jan. 16, 1888. Sidereal time of mean noon at Greenwich = I9h 41™ 27s.80Correction for longitude 6.0511 west Local sidereal time of mean noonRight ascension… … 390. Finding the Altitude.—The relation between lati-tude, declination, and altitude is shown by Fig. 146, which rep-resents a meridian section of the celestialsphere. Let PP be the line through theearths axis; QQ the plane of the equa-tor; Z the zenith, and HH the horizon.Then HP=ZQ = 0 is the…
Surveying
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