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A square standing for a built feature.
Also known as: Man-made feature symbol, Control description structure
The IOF control description symbol group for built features such as buildings, ruins, cairns and fences.
Marks a built feature such as a building, ruin, cairn or fence as the feature carrying the control.
Contexts: Maps
Uses angular shapes where natural features use rounded ones, so a competitor can tell built from natural before identifying which built thing it is.
Contexts: Maps
A square or rectangular outline, the shape the system reserves for anything built rather than natural.