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Define: WCB and Quadrantal Bearing system
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Ans.: 1)WCB:-In this system the bearing of a line is always measured clockwise for the north point of the reference meridian towards the line round the circle the angle thus measured is called as WCB system 

2) Quadrantal Bearing system:- In this system the bearing of a line is measured clockwise from the north point or south point whichever is nearest .
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