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