Objective Question
Two consecutive readings in the levelling data are 1.445 m and 1.995 m. The first is a foresight and the second is a back
sight. Then,
Two consecutive readings in the levelling data are 1.445 m and 1.995 m. The first is a foresight and the second is a back
sight. Then,
The two readings are taken to the same point from two instrument stations.
When the position of instrument is to be changed at a station, then the last reading at previous position in fore sight and
first reading from new position is back sight for the same station.
जब किसी स्टेशन पर उपकरण की स्थिति बदलनी हो, तो पिछली स्थिति में ली गई अंतिम रीडिंग 'फोर साइट' (fore sight) होती है, और नई
स्थिति से ली गई पहली रीडिंग उसी स्टेशन के लिए 'बैक साइट' (back sight) होती है।
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