Key:biotic_reef:type
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 biotic_reef:type
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| Description |
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Specifies how the biotic reef lies in relation to the land. 
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| Group: marine |
| Used on these elements |
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| Requires |
| Status: in use |
| Tools for this tag |
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Use biotic_reef:type=* to specify how the biotic reef lies in relation to the land.
Suggested values
| Value | Description | Image |
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| fringing |  Fringing reef – directly attached to a shore, or borders it with an intervening shallow channel or lagoon
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| barrier | Barrier reef – reef separated from a mainland or island shore by a deep channel or lagoon | 
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| atoll | Atoll – more or less circular or continuous barrier reef extends all the way around a lagoon without a central island
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