A fundamental surveying procedure used to determine the height of unknown points relative to a known datum. A surveyor uses an optical or digital level and a graduated staff to take successive backsights and foresights along a route. This creates a continuous chain of elevation transfers.
We'll spend the morning leveling from the benchmark on the bridge down to the new sewer invert.
Also heard as
- levelling
Related terms
Datum
A fixed mathematical reference surface or system used as a foundation for calculating coordinates and elevations.
Bench
A permanent bracket or mark used as a stable reference point for elevation.
Dumpy level
A robust optical leveling instrument featuring a telescope rigidly fixed to its horizontal rotating base.
Close
To complete a traverse and return to the starting point or another known control point with acceptable accuracy.