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Trigonometric Deﬁnitions and Identities 674
Angles and Directions
14 other sections not shown
accuracy adjustment air photos alignment axis azimuth bearing boundary bubble calculated circle circular curve clinometer comer construction contour contour line coordinates correction Courtesy cross hair cross sections curbed road data collector deﬁned deﬂection angle determined difference in elevation direction dumpy level electronic error example ﬁeld notes ﬁgure ﬁnal ﬁrst foot foot units geoid geometric grid ground height highway horizontal distance illustrated instrument intersection latitudes and departures layout Leica length line of sight maps mark measured meridian meters metric micrometer offset optical plotted plumb bob position precise prism proﬁle radius road rod interval rod reading scale screws shown in Figure signiﬁcant slope distance sounding lines speciﬁc spiral stadia steel tape superelevation survey surveyor Table tangent techniques telescope theodolite tion topographic Total Station transit tripod tumed vemier vertical angle zero