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Define Base line, Tie line, Check line with neat sketch?
base line • 18k  views
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Base line - Longest survey line passing through the centre of the are to be surveyed is called as base line.

Tie line – Line joining some fixed points as a Tie station on the main survey line is called as Tie line.

Check line – The line joining between the apex of triangle and some fixed point on survey line or on base line is called as check line.

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