|An area in the tidal range.|
|Used on these elements|
|Status: de facto|
|Tools for this tag|
The tag tidal=yes indicates that an element is in the tidal range. It could be a river, a shore, a part of a harbour or a water area.
When the part of the harbour has a gate which does not let the tide in you may tag it with tidal=no. But this is the default value so it is not really necessary.
How to map?
If you know where are the limits of the tide and of the river (because you have imagery at low tide and another at high tide), you can add 3 areas (closed ways or multipolygons), one for the river's water body and 2 (one on each side of the river) with tags natural=wetland + wetland=tidalflat (if these are muddy areas: you don't need in this case of tidal=yes) or natural=sand + tidal=yes (if areas are sandy) or natural=shingle + tidal=yes or any other tags (according to the type of soil) + tidal=yes.
Tidal area at sea
natural=sand + tidal=yes Don't use natural=beach for an area under water at high tide, the value beach is only for the part above the coast line (see natural=sand)
|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. the 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: