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LEVELLING

LEVELLING :- “Levelling is an art of

determining the relative heights of diffe

points on above ( or) below the surfae

the earth!

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OBJECTIVE 

“ "o determine the elevations of

un#nown points on earth surfae “ $ith

respet to “datum “

(Elevation % height )

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PURPOSE OF LEVELLING

"& 'N&$ "E ELEV"I&N* &+ ,N'N&$N &IN"* .

"& +I/ "E 0EN1 23'* " 3&2INEN" L1E*.

"& +I/ "E LIGN2EN" +&3 3&4* N4 3IL$5*.

"& 3E3E L&NGI",4NL *E1"I&N N4 13&**-

*E1"I&N* +&3 3&4* IN &34E3 "& 1L1,L"E

E3"$&3'.

"& *EE "E 4E"* &+ E/1V"I&N IN

+&,N4"I&N*.

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IMPORTANT DEFINITIONS

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CONTD..

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2ean sea level

“2EN *E LEVEL I* "E *"N434 4",2 “

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BENCH MARK 

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AUTO LEVEL : (1832) WILLIAM

GRAVATT

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"op view of level

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1ross hairs 6 stadia 7

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TRIPOD

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LEVELLING STAFF

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"5E* &+ LEVEL*

,"& LEVEL

4,25 LEVEL

$5E(5) LEVEL

"IL"ING LEVEL

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"E2&335 6 E32ENN" 48,*",2EN"*

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2E"&4 &+ LEVELLING

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"N' 5&,

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