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An H across a boundary showing shared responsibility.
Also known as: H marking boundary, Party boundary mark, Shared responsibility mark
An H-mark is drawn as two T-marks back to back across a boundary, conventionally indicating that the feature is shared and responsibility falls on both sides.
Indicates by convention that a boundary feature is shared between both parcels.
Contexts: Maps
Carries the same limitation as the T-mark the catalogue already holds: it records an intention on a plan and is not itself the source of any obligation.
Contexts: Maps
Two crossbars either side of the boundary joined by a short stem across it, forming a letter H lying on its side.