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Measurement of Distances 5 Length of a Line
Measuring on Uneven or Sloping Ground with Steel Tape
96 other sections not shown
accuracy adjustment algebraic sum alidade altitude azimuth backsight base line batter boards bubble tube celestial celestial equator celestial sphere clamp clockwise closed traverse computed contour correction Cosine Cotang curve deflection angle determined Diff dumpy level equal error of closure established field notes grade horizontal angle horizontal axis horizontal cross hair horizontal distance illustrated in Fig instrument intersection interval latitudes and departures length and bearing leveling screws line of sight longitude magnetic magnetic bearing magnetic declination measured meridian Nautical Almanac objective lens observation obtained parallel photographs plane table plat plate plotted Polaris pole distance position principal meridian range line reference line right ascension rod intercept rod reading set-up point shown in Fig sidereal Sine stadia star station steel tape survey Tang tangent tion transit is set usually vernier vertical angle vertical axis vertical cross hair vertical distance zero