Warin <61sundow...@gmail.com> writes: > The ‘dry swamp’ has no apparent way to tag it. These will not be found > in Europe, just as you don’t find deserts there. > > They have occasional water, not seasonal, not yearly but, say, between > 5 to 20 years they have water. As such they do not satisfy the OSM > swamp definitions at all.
They do not satisfy the science definition of wetland either. > See https://theconversation.com/why-a-wetland-might-not-be-wet-103687 > for more on their characteristics, at least in Australia. OSM has > access to a imagery source in Australia that maps them, so OSM has a > legal source for them. What is needed is a tag for them, say, > ‘natural=dry_swamp’??? It sounds like "Place with trees that is known to flood occasionally" which is natural=wood (if natural). > There are ~ 4,000 of these ‘natural=mud’ mapped so far that are in > fact ‘dry swamps’. Note that the tag natural=mud wiki says “This tag > should not be used for areas with intermittent water cover which are > water covered or completely dry most of the time.” So this tagging is > incorrect as they are dry most of the time… As always, I think OSM should look to the professional literature and adopt their definitions, exactly, rather than trying to invent categories. For wetlands, the definitions in the US: https://www.fws.gov/media/classification-wetlands-and-deepwater-habitats-united-states A broader perspective: https://www.sciencedirect.com/topics/earth-and-planetary-sciences/wetland I am unclear on if "Cowardin" is really an international thing; I more or less expect it to be as that's how scientists do things. More or less, a wetland is characterized by being wet for at least a portion of the growing season in a normal year. And, just because you don't see standing water doesn't mean the soil is not wet. So to me, "dry swamp" is fairly clearly not a wetland and the first thing is to get a real science opinion about whether it is wetland or not. A quick search does not support the idea that the term is used in English at all. I would expect a mapper.au could just call their government, the part that does conservation and wetland rules and talk to someone. _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
