<div dir="ltr">> I would think a good start would be changing the wiki to make it historic=flood_level, leaving any reference to high (or low) water to be a waterways thing ie the high tide mark.<div><br></div><div>+1<br></div><div><br></div><div>Very sensible IMO.</div></div><br><div class="gmail_quote"><div dir="ltr">On Sun, Aug 5, 2018 at 2:59 PM Graeme Fitzpatrick <<a href="mailto:graemefitz1@gmail.com">graemefitz1@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 dir="ltr"><br><div class="gmail_extra"><br clear="all"><div><div class="m_4749542882077404523gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div dir="ltr">On 6 August 2018 at 02:48, Robert Szczepanek <span dir="ltr"><<a href="mailto:robert@szczepanek.pl" target="_blank">robert@szczepanek.pl</a>></span> wrote:<br></div></div></div></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">W dniu 05.08.2018 o 12:23, Volker Schmidt pisze:<span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Flood marks and high water marks are not necessarily the same thing.<br>
Read<br>
<a href="https://en.wikipedia.org/wiki/High_water_mark" rel="noreferrer" target="_blank">https://en.wikipedia.org/wiki/High_water_mark</a><br>
to get the gist.<br>
There are ordinary high water marks (and I suppose also the opposite, ordinary low water marks) which are based on the regular tides in the area.<br>
A flood mark would be a marker for the water level reached in certain, particular events.<br>
I am not sure about terminology in different jurisdictions, but the concept seems to be clear to me that there are two different things we want to tag.<br>
</blockquote>
<br></span>
I would like it to be so:<br>
- flood marks as flood signs,<br>
- highwater marks as tide signs.<br>
But even in recent scientific papers this division is not so clear.<br>
<br>
Another issue is that from the beginning, on OSM wiki<br>
<a href="https://wiki.openstreetmap.org/wiki/Key:historic" rel="noreferrer" target="_blank">https://wiki.openstreetmap.org/wiki/Key:historic</a><br>
mark related to floods is described as<br>
historic=highwater_mark<br>
<br>
What would be the optimal tagging solution from OSM point of view?<br>
<br>
regards<span class="m_4749542882077404523HOEnZb"><font color="#888888"><br>
Robert</font></span></blockquote><div><br></div><div>I would think a good start would be changing the wiki to make it historic=flood_level, leaving any reference to high (or low) water to be a waterways thing ie the high tide mark.</div><div><br></div><div>Thanks</div><div><br></div><div>Graeme</div><div> </div></div></div></div>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr">Dave Swarthout<br>Homer, Alaska<br>Chiang Mai, Thailand<br>Travel Blog at <a href="http://dswarthout.blogspot.com" target="_blank">http://dswarthout.blogspot.com</a></div></div>