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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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