|natural = shoal|
|An area of the sea floor which nears the sea surface and is exposed at low tide.|
|Used on these elements|
|Status: de facto|
|Tools for this tag|
The natural=shoal tag is used to mark an area of the sea floor which nears the sea surface (literally, becomes shallow) and is exposed at low tide. This tag is used for distinct raised features like sand or gravel bars but not for tidal flats, i.e. larger flat tidal areas.
How to map
If known you can add the following tags:
- name=* for the name of the shoal
- surface=* to specify the surface material of the shoal, for example surface=sand or surface=gravel
This tag is not recommended for:
- features that are permanently below water - instead natural=reef is recommended. However, natural=shoal is used by some mappers for sand and gravel bars that are shallow but permanently below water even at low tide.
- features that are permanently above water - use place=island or place=islet and natural=coastline
- for the lower part of beaches lying below the water level - these should be part of a natural=beach.
- tidal flats, i.e. flat areas exposed at low tide but water covered at high tide - use natural=wetland + wetland=tidalflat instead.
|natural=shoal + surface=sand||natural=shoal + surface=gravel|