Surveying
The sidereal day is the time interval between two successive upper transits of

First point of Libra
The polar star
Mean sun
First point of Aries

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Surveying
The rise and fall method

provides a check on the reduction of intermediate point levels
is not suitable for levelling with tilting levels
quicker and less tedious for large number of intermediate sights
is less accurate than height of instrument method

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