<div dir="auto">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.</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, 11 Feb 2023, 10:52 Warin, <<a href="mailto:61sundowner@gmail.com">61sundowner@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<p><br>
</p>
<div>On 11/2/23 21:23, Jez Nicholson wrote:<br>
</div>
<blockquote type="cite">
<div dir="auto">I see what you are saying, but 'dry swamp' feels
slightly odd. Is there something like 'intermittent wetland'
that is more appropriate?</div>
</blockquote>
<p><br>
</p>
<p>It is 'slightly odd' ... in that it is not found in populated
parts of the globe. <br>
</p>
<p>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. <br>
</p>
<p>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.. <br>
</p>
<p>OSM existing tags</p>
<p>wetland = "A natural area subject to inundation or with
waterlogged ground"</p>
<p>Not water logged most of the time so does not fit... The
'inundation' is very seldom. <br>
</p>
<p>swamp = "An area of waterlogged forest, with dense vegetation."</p>
<p>Not water logged most of the time, not a forest, and not dense
vegetation<br>
</p>
<p>mud = "Area covered with mud: water saturated fine grained soil
without significant plant growth"<br>
</p>
<p>Again not water saturated most of the time. <br>
</p>
<blockquote type="cite"><br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sat, 11 Feb 2023, 10:11
Warin, <<a href="mailto:61sundowner@gmail.com" target="_blank" rel="noreferrer">61sundowner@gmail.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<p> </p>
<p style="margin-bottom:0cm;line-height:100%"> 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. </p>
<p style="margin-bottom:0cm;line-height:100%">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. </p>
<p style="margin-bottom:0cm;line-height:100%">See <a href="https://theconversation.com/why-a-wetland-might-not-be-wet-103687" rel="noreferrer noreferrer" target="_blank">https://theconversation.com/why-a-wetland-might-not-be-wet-103687</a>
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’??? </p>
<p style="margin-bottom:0cm;line-height:100%">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… <br>
</p>
<p style="margin-bottom:0cm;line-height:100%"><br>
</p>
<p style="margin-bottom:0cm;line-height:100%">There are more
in existence but not mapped. </p>
<p style="margin-bottom:0cm;line-height:100%">Sample <a href="https://www.openstreetmap.org/way/1143825454" rel="noreferrer noreferrer" target="_blank">https://www.openstreetmap.org/way/</a><a href="https://www.openstreetmap.org/way/1143851993" rel="noreferrer noreferrer" target="_blank">1143851993</a></p>
<p style="margin-bottom:0cm;line-height:100%"><br>
</p>
<p style="margin-bottom:0cm;line-height:100%">Any thoughts?
</p>
<p> </p>
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