## Basic plane surveying |

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adjustment alidade alignment azimuth backsight bench mark boundaries calculated catch points central angle clockwise compass bearings contour control points corners correction Cosine Sine Cosine Cotang Tang Cotang counterclockwise course deflection angles degrees departures and latitudes differences in elevation direction earth's ephemeris equal error of closure field figure foot foresight grade Greenwich hour angle grid height highway horizontal angle horizontal distance hubs instrument intersection intervals land length level rod line of sight longitude magnetic declination method observation observer's perpendicular offset plane coordinate system plane coordinates plane surveying plane table plate plotted plumb bob Polaris pole polygon precision protractor radius rod reading rotation scale Sine Cosine Sine slope distance square feet stadia Stadia measurements stakes steel tape surveyor Tang Cotang Tang tangent screw telescope transit line transit stations transverse Mercator projection traverse lines triangle tripod true bearing values vernier vertical angle y-coordinates zero