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MEASUREMENT OF DISTANCE
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Accordingly accuracy adjacent adjusted adverse possession alidade applied axis azimuth backsight bearing benchmark boundary bubble tube calculated celestial sphere clamp computed contour lines coordinates corner correct Cosine Sine Cosine Cotan Tan Cotan cross-wire curve deflection angle determined difference in elevation direction dumpy level eleva engineer error of closure eyepiece follows given ground head tapeman Hence horizontal distance instrument intersection interval land latitude lens line of sight located magnetic bearing mark measured meridian method object objective lens observed offsets parallax perpendicular photograph plane plane table plotted Polaris pole position precision principal point procedure protractor rod reading scale screws shown in Fig side significant figures Sine Cosine Sine slide rule slope sources of error stadia stake station steel tape surface survey surveyor taken tangent tape length telescope templet tion tract transit traverse triangle vernier vertical angle