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307 Uncrossable marsh

307 Uncrossable marsh (ISMTBOM 2022)

Geometry: area.


A marsh which is uncrossable or dangerous for the competitor. The blue outline emphasises that the feature is uncrossable. The blue outline is omitted for boundaries between uncrossable marsh and symbol Uncrossable body of water (301). The symbol may be combined with a Rough open land symbol (403, 404) to show openness. At least two blue lines shall be clearly visible.
The symbol is orientated to north.


Minimum width: 0.3 mm (inside) (footprint 4.5 m).

Minimum area: 2 mm² (inside).

Smaller areas must either be left out, exaggerated or shown using symbol
Uncrossable body of water (301).

Colour: blue (outline), blue.


The definition of this map symbol was updated on 01.02.2023: Change in graphics.