Hi everybody,
We have seen that Leveling is an operation determining the relative elevations of different points on the surface of earth.
By the relative elevation is meant the difference of elevation between any two points considered . There may be rise or fall at one point with respect to other . The relative elevations of different points are always referred to some datumto represent them on the plan or map.USUALLY THE MEAN SEA LEVEL(MSL) IS TAKEN AS THE DATUM.
Instruments used for levelling
1)LEVEL
2)lEVELLING STAFF
3) CHAIN OR TAPE AND A LEVEL FIELD BOOK IS USED TO RECORD THE B.S,F.SAND I.S AND R.L
WHAT IS B.S ,F.S,I.S AND R.L? WE WILL SEE.
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