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Public-images-osm logo.svg tidal
Onehunga Shoreline For Reclamation.jpg
An area in the tidal range. Edit or translate this description.
Group: Marine
Used on these elements
should not be used on nodesmay be used on waysmay be used on areasmay be used on relations
Useful combination
Status: in use


The tag tidal=yes indicates that an element is in the tidal range. It could be a river, shore, part of the harbour or water area.

When the part of the harbour has a gate which does not let the tide in you can tag it with tidal=no. But normally this is default value which is not used.

How to map?


way River flow
+ name=*
+ tidal=yes
area River's water body
natural=water + water=river
+ tidal=yes

Tidal area at sea

Areas in the tidal range between  mean high water springs (natural=coastline) and  mean low water springs can be tagged with tidal=yes to explicitly indicate this. Some tags commonly used for these areas like natural=wetland + wetland=tidalflat already imply the area being in the tidal range.


Value Description
yes Indicates that an area is in the tidal range. The top of the tidal range is generally taken to be at natural=coastline; i.e., mean high-water springs (MHWS).
no Default. Disambiguates whether item is not in the tidal range, or has not been considered for tagging. Not explicitly required.

You can also add the type of this area:

Similar objects with deprecated values

If you know places with this tag, verify if it could be tagged with another tag.
Automated edits are strongly discouraged unless you really know what you are doing!

See also