Hi, I would create a multipolygon for that. Wetland is something different than a lake/pond.
For wetland the wiki says, that wetland areas contain "characteristic vegetation that is adapted to its unique soil conditions" [0]. A lake obviously doesn't (at least no land-vegetation like grass and bushes) and this is why an area cannot be wetland *and* lake at the same time. And this is why I consider a multipolygon to be correct. There might be situations, where two different areas have to be on top of each other (e.g. a wetland area within a forest where trees are growing also within the wetland area?), but I thing most of the time there's only one landuse that fits. Of course there might be some discussion but I would consider a multipolygon to be correct in your specific example. Hauke [0] https://wiki.openstreetmap.org/wiki/Tag:natural%3Dwetland On 30.04.20 16:36, Jean-Marc Liotier wrote: > Consider a wetland that contains a water body. I'm used to map that as > natural=water inside natural=wetland - no multipolygon fanciness, just > one on top of the other. JOSM validator complains about it, which irks > me, so I opened a ticket at https://josm.openstreetmap.de/ticket/19171 - > where mdk suggests that I may be doing it wrong... > > Is my simple way incorrect ? It feels correct to me because wetlands are > complex objects - water bodies are part of them, cross them or partially > overlap them. From a tagging point of view, it implies that some area is > both natural=water and natural=wetland - I see no problem with that... > But others might consider that a logical impossibility. > > So, which is the correct way: plain natural=water inside > natural=wetland, or a natural=water multipolygon with natural=wetland on > its inner ? > > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging
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