Have you seen any areas of mangroves tagged over water? That is,
outside of the coastline or over natural=water or waterway=riverbank
areas?

I would like to be able to render mangroves with a fill color, as with
wetland-swamp, a similar environment. But this will case a large
change in the appearance of the coastline if many areas have been
tagged outside of the coastline, over the water.

Generally I have been mapping mangroves with the limit of the
trees/shrubs as the coastline, as recommended on this list a few
months ago. This appears to be similar to how most swamps are mapped,
even though a swamp may actually be mostly flooded.

The wiki page does not clearly specify this, but it does seem to imply
that mangroves are mapped over land, as it recommends using a
multipolygon if there are areas of open water or "other land" within
the mangrove - implying that mangroves are a type of "land".
https://wiki.openstreetmap.org/wiki/Tag:wetland%3Dmangrove

- Joseph

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