(i) Offsets from long chord

In this method, long chord is divided into an even number of equal parts. Taking centre of long
chord as origin, for various values of x, the perpendicular offsets are calculated to the curve and
the curve is set in the field by driving pegs at those offsets.

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R — radius of the curve
4. — length of long chord
Oy - mid-ordinate
O, - ordinate at distance x from the mid-point of long chord
Ordinate at distance x = O, = 20-00