An area that shall not be entered such as a private area, a flower bed, a
railway area etc. No feature shall be represented in this area, except very
prominent features such as railways, large buildings, or very large trees. Road entrances shall be represented clearly.
Areas that shall not be entered totally contained within buildings shall be mapped as being a part of the building.
The area shall always be delineated by a boundary line (at least 0.1 mm in width).
Minimum width: 0.25 mm (footprint 1 m).
Minimum area: 0.25 mm² (footprint 4 m²).
Colour: yellow 100%, green 50%.