On 12/2/23 02:23, Tod Fitch wrote:
In the deserts of the southwest United States there are features that
could probably use similar help in tagging. In California they usually
have “Dry Lake” in the name (assuming they are named). At least one in
Arizona has “Playa” (Spanish for beach or shallow) in its name. From
your description, they may get water more often than the “dry swamps”
you write about but the tagging is similarly unclear.
At present the Wilcox Playa in Arizona is tagged with:
intermittent=yes
name=Willcox Playa
natural=water
note=This area is dry, not water or wetland.
type=multipolygon
wikidata=Q8003532
wikipedia=en:Willcox Playa
While a California example is tagged with:
name=Soda Dry Lake
natural=mud
wikidata=Q81309
wikipedia=en:Soda Lake (San Bernardino County)
This could be an interesting discussion and maybe we can arrive at
tagging that works outside of Australia as well as accurately describe
your dry swamps.
Australia too has 'dry lakes' the most famous is Lake Eyre, Relation:
Kati Thanda-Lake Eyre (North) (253952)
https://www.openstreetmap.org/relation/253952#map=8/-28.343/137.592
I'd not describe it as a dry swamp as it lacks plant life due to the
salt that is present when dry and the depth of water when wet. I
describe it as a 'salt lake' and there are many of them in Australia.
Presently tagged
alt_name = Lake Eyre (North)
ele = -15
intermittent = yes
name = Kati Thanda-Lake Eyre (North)
name:de = Eyresee
name:hu = Eyre-tó
natural = water
old_name = Kati Thanda
salt = yes
water = lake
wikidata = Q179970
wikipedia = en:Lake Eyre
I think I'd add the tag surface=salt just to drive home the point.
I think a 'swamp' (wet or dry) should have plant life.
Another Australian link
https://wetlandinfo.des.qld.gov.au/resources/static/pdf/resources/fact-sheets/profiles/new-profiles/29113-05-arid-swamps-web.pdf
On Feb 11, 2023, at 2:07 AM, 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.
Seehttps://theconversation.com/why-a-wetland-might-not-be-wet-103687for
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.
Samplehttps://www.openstreetmap.org/way/
<https://www.openstreetmap.org/way/1143825454>1143851993
<https://www.openstreetmap.org/way/1143851993>
Any thoughts?
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