Here is an example of mangroves over a river
Way: 49405103
P.S. the wiki says 'wetlands' can only be a closed way.
Unfortunately in some cases they have to be multipolygon relations.
On 29/12/18 12:55, Alan Mackie wrote:
On Fri, 28 Dec 2018 at 20:30, Joseph Eisenberg
<joseph.eisenb...@gmail.com <mailto:joseph.eisenb...@gmail.com>> wrote:
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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As they are tidal and the OSM wiki doesn't even count the part of the
beach that gets wet as beach [1] (despite the picture). I would expect
mangrove to be (almost) entirely on the "wet" side of the coastline.
-Alan
1 : https://wiki.openstreetmap.org/wiki/Tag:natural%3Dbeach
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