Level staff

Two sides of a modern surveyor's levelling rod.Metric graduations are on the left, imperial on the right.

Surveyor's view of the levelling rod with the crosshair. This indicates a reading of 1.422 m

A level staff, also called levelling rod, is a graduated wooden or aluminium rod, used with a levelling instrument to determine the difference in height between points or heights of points above a datum surface. It cannot be used without a leveling instrument.

单词	Levelling staff
释义	Levelling staff 英语百科 Level staff A level staff, also called levelling rod, is a graduated wooden or aluminium rod, used with a levelling instrument to determine the difference in height between points or heights of points above a datum surface. It cannot be used without a leveling instrument.
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Levelling staff

Level staff