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MEASUREMENT OF DISTANCE
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Accordingly accuracy adjacent adjustment adverse possession alidade axis azimuth backsight bearing benchmark boundary bubble tube calculated camera celestial sphere computed contour lines contour points coordinates corner correct Cosin Sin Cosin Cotan Tan Cotan cross-wire curve datum deflection angle determined difference in elevation direction dumpy level eleva error of closure field notes fixed follows foresight given ground head tapeman Hence hour angle instrument intersection interval land latitude length line of sight located magnetic bearing mark measured meridian method objective lens objects observed parallax perpendicular photograph plane table plat plotted Polaris pole position precision principal point Prob procedure protractor rod reading rodman scale screws shown in Fig Sine Cosine Sine slope sources of error stadia stake station stereoscopic surface survey surveyor taken tangent tape telescope templet tion tract transit traverse triangle vernier vertical angle