The UK has plenty of areas around the coast that are deliberately not protected by flood defences so they would soak up the power of an intermittent flood. Are these a similar thing? They aren't wetlands as they aren't wet all the time.
On Sat, 11 Feb 2023, 10:52 Warin, <61sundow...@gmail.com> wrote: > > On 11/2/23 21:23, Jez Nicholson wrote: > > I see what you are saying, but 'dry swamp' feels slightly odd. Is there > something like 'intermittent wetland' that is more appropriate? > > > It is 'slightly odd' ... in that it is not found in populated parts of the > globe. > > OSM tagging is written mostly by people in populated parts of the globe, > so it suits those populated places. That is no ones fault, we all operate > on the knowledge we have. > > Unfortunately 'dry swamps' exist and do not fit the definitions used in > OSM exiting tags, 'wetlands' are wet.. not 'dry', 'swamps' are 'wet', even > 'mud' is wet.. > > OSM existing tags > > wetland = "A natural area subject to inundation or with waterlogged ground" > > Not water logged most of the time so does not fit... The 'inundation' is > very seldom. > > swamp = "An area of waterlogged forest, with dense vegetation." > > Not water logged most of the time, not a forest, and not dense vegetation > > mud = "Area covered with mud: water saturated fine grained soil without > significant plant growth" > > Again not water saturated most of the time. > > > On Sat, 11 Feb 2023, 10:11 Warin, <61sundow...@gmail.com> wrote: > >> 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. >> >> 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’??? >> >> 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… >> >> >> There are more in existence but not mapped. >> >> Sample https://www.openstreetmap.org/way/ >> <https://www.openstreetmap.org/way/1143825454>1143851993 >> <https://www.openstreetmap.org/way/1143851993> >> >> >> Any thoughts? >> >> _______________________________________________ >> Tagging mailing list >> Tagging@openstreetmap.org >> https://lists.openstreetmap.org/listinfo/tagging >> > > _______________________________________________ > Tagging mailing > listTagging@openstreetmap.orghttps://lists.openstreetmap.org/listinfo/tagging > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging >
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