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Exercises in Compass Surveying
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accurate adjustment alidade auxiliary telescope axis azimuth beam compass bearing bench-mark boundary bubble tube calculated celestial sphere center-line central angle chord computations contours convenient coordinates corner correct Cotang Tang Cotg cross-section curve deed deflection angle determined difference in elevation dumpy level earth error excavation EXERCISE feet given grade graduated ground Gunter's chain hair highway horizontal inch inked instrument intersection latitude length line of sight located magnetic declination measured meridian method move N.cos N.sine necessary needle notes obtained paper parallel placed plane plane-table planimeter plate plotted plumb-bob Polaris position protractor quarter-section railroad rear tapeman recorded right angles rod reading rodman scale scale maps screws shown in Fig side slide-rule slope solar attachment spirit level stadia stakes steel tape survey surveyor taken Tang Cotang tangent thru tion township transit points traverse triangle usually vernier vertical angle zero