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Chain Surveying Instruments and their Uses
Chain Surveying in the Field
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accuracy accurate adjustment alidade arrow Back Sight base bench mark bubble calculated centre chain length chain line chain survey Chapter checked clinometer co-ordinates collimation height columns compass contour contour lines Cosine curvature and refraction curve deflection angle dimensions distance drawn Dumpy Level equal error Example feet field book figures fixed floor formula given gives ground Gunter's Chain Higher National Certificate horizontal inserted instrument Intermediate Sight Latitudes and Departures level book logarithmic magnetic bearing measured method normally noted obstacle obstruction obtained Ordnance Map perpendicular plane table plate plotted position position of point radius ranging pole reading taken Reduced Level right angles Rule screws sheet shown in Fig side Simpson's Rule Sine Sine Rule slope staff reading station subtracted surveyor Tacheometry tangent tangential angle tape telescope theodolite Trapezoidal Rule triangle tripod tube vernier vernier scale vertical angles wall