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Public-images-osm logo.svg natural = atoll
A ring-shaped coral reef ithat encircles a lagoon partially or completely, and may include small islands. Show/edit corresponding data item.
Group: natural
Used on these elements
may be used on nodesshould not be used on waysmay be used on areas (and multipolygon relations)should not be used on relations (except multipolygon relations)
Useful combination
See also
Status: in use

The tag natural=atoll is used to map an atoll (sometimes called a coral atoll), a ring-shaped coral reef including a coral rim that encircles a lagoon partially or completely, and may include small islands or islets.

How to map

node As a node: if the full extent of the atoll, including the reef, cannot be yet be mapped, then place a node at the approximate center of the atoll.

area As an area: draw a closed way around the outer border of the reef, including all of the islands and the lagoon within the area. This is the most common way of mapping atolls.

relation Use a multipolygon relation if the atoll has more than one area; draw two or more closed ways and add each to the relation with role=outer.

  • Note: place=island must be use the coastline when mapped as an area or relation, but natural=atoll should include the entire area of the coral reef and lagoon, in addition to any island or islets.
  • Consider adding the islands to a multipolygon relation with place=archipelago if the group of islands has a name.

Tags used in combination

See also