A gigantic boulder, rock pillar or massive cliff shall be represented in plan shape. The objects can vary in shape and width.
The gap between gigantic boulders or between gigantic boulders and other impassable feature symbols must exceed 0.15 mm on the map
Minimum width: 0.25 mm (footprint 3.75 m).
Minimum area: 0.3 mm² (footprint 67 m²).
The definition of this map symbol was updated on 16.09.2022: Correction of minimum size: 0.3 –> 0.25