The surveyor extended the levelling staff to record the benchmark height across the wetland.

The surveyor extended the level staff to record the exact elevation of the benchmark.

The survey crew carefully extended the leveling staffs across the uneven terrain to measure the elevation differences.

Before the survey began, the team checked that all the levelling staffs were properly calibrated.

The survey team carried several level staffs to the construction site to measure the elevation changes across the lot.

The technician adjusted the leveling staff before taking precise elevation measurements.