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521 Building

521 Building (ISMTBOM 2022)

Geometry: area.


A building is a relatively permanent construction having a roof. Buildings within symbol Area that shall not be entered (520) may just be
represented in a simplified manner. Areas totally contained within a
building shall be mapped as being a part of the building. A building
shall not be entered.
Minimum gap between buildings and other impassable features
should be 1 mm. Boundaries in touching buildings shall not be represented.


Minimum width: 1 mm (footprint 15 m).

Minimum area: 1 mm2.

Colour: black (or black (outline), black 60%).

Outline shall only apply in 1:5000 or 1:7500.