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An E-shaped pattern reading height to a hundredth.
Also known as: E pattern staff, Staff graduation survey, Levelling rod graduation
A levelling staff carries a graduated pattern of E-shaped blocks, each block spanning a hundredth of a metre so a reading can be taken to a millimetre by estimation.
Allows a height to be read from a distance, each E block spanning a fixed interval.
Contexts: Maps
Uses the E shape because its three bars and two gaps divide the block into five readable parts, so the pattern is a measuring device rather than a label.
Contexts: Maps
A tall staff marked with repeating blocks in the shape of a letter E, alternating with plain gaps of equal size.
A fuller structured visual breakdown is not yet documented for this symbol.