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<p>Hi</p>
<p>That page contains</p>
<p>"The <a
href="http://en.wikipedia.org/wiki/Mean_low_water_spring"
class="extiw" title="wikipedia:Mean low water spring">Mean low
water spring</a> is the position of the lowest tide. There is
currently no agreed way of tagging this line in OSM. One way of
tagging it is to tag the area between the mean low water spring
and OSM coastline as <tt dir="ltr" class="mw-content-ltr"
style="background:#EEF;font-size:1em;line-height:1.6"><bdi
style="white-space:nowrap"><a
href="https://wiki.openstreetmap.org/wiki/Key:natural"
title="Key:natural">natural</a></bdi>=<a
href="https://wiki.openstreetmap.org/wiki/Tag:natural%3Dwetland"
title="Tag:natural=wetland"><bdi>wetland</bdi></a></tt>+<tt
dir="ltr" class="mw-content-ltr"
style="background:#EEF;font-size:1em;line-height:1.6"><bdi
style="white-space:nowrap"><a
href="https://wiki.openstreetmap.org/wiki/Key:wetland"
title="Key:wetland">wetland</a></bdi>=<a
href="https://wiki.openstreetmap.org/wiki/Tag:wetland%3Dtidalflat"
title="Tag:wetland=tidalflat"><bdi>tidalflat</bdi></a></tt>."</p>
<div class="moz-cite-prefix">Methinks that MLW or MLWS should be
defined in the way that Coastline/MHW is.</div>
<div class="moz-cite-prefix"><br>
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<div class="moz-cite-prefix"><br>
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<div class="moz-cite-prefix"><br>
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<div class="moz-cite-prefix">On 13/07/2019 21:52, Colin Smale wrote:<br>
</div>
<blockquote type="cite"
cite="mid:5b68539d1d06e2f50c156e831040f7db@xs4all.nl">
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<p>On 2019-07-13 22:42, Tony Shield wrote:</p>
<blockquote type="cite" style="padding: 0 0.4em; border-left:
#1010ff 2px solid; margin: 0">
<p>Hi</p>
<p>I meant that OSM does not have an agreed way of tagging MLWS
or MLW. <a class="moz-txt-link-freetext"
href="https://wiki.openstreetmap.org/wiki/Tag:natural%3Dcoastline"
target="_blank" rel="noopener noreferrer"
moz-do-not-send="true">https://wiki.openstreetmap.org/wiki/Tag:natural%3Dcoastline</a></p>
</blockquote>
<p>That page is about coastline, which is high water, not low
water. But you are probably right. In the case of the UK, there
are proxies like admin boundaries which help a lot, and the OS
have been good enough to survey all this coastal stuff, but
there is no way of tagging a line with "boundary=lwm" or
whatever. Should it be a tag on a way, similar to the way the
coastline is tagged? Or should it be a huge relation, like the
admin boundary of the United Kingdom?</p>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
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</blockquote>
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