<div dir="auto"><div dir="auto"><b>Was Re: [Tagging] Definition of a Beach</b></div><i><div dir="auto"><i><br></i></div>> that then clashes with OSM Coastline, which is taken as the High Tide mark</i><div dir="auto"><br></div><div dir="auto">I was under the impression that the definition of the coastline was the average between high and low, not the high tide mark, based on what I had read on some wiki page. I think that there must be conflicting guidelines on the wiki since I've noticed two conflicting mapping styles. </div><div dir="auto"><br></div><div dir="auto">What style do people think is better? Is there an advantage to one over the other? </div><div dir="auto"><br></div><div dir="auto">Also, is there a good way to map the coastline as an area representing the low tide to high tide difference? Adding some tag like tidal=yes to areas representing that shape is the best I've found, but tidal=yes can also be used to mark that some water or marsh is tidal.</div><div dir="auto"><br></div><div dir="auto">Thanks,</div><div dir="auto">Leif Rasmussen</div><div dir="auto"><br></div><div dir="auto"><i><br></i></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Aug 15, 2019, 8:02 AM 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"><div dir="ltr"><br></div><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, 15 Aug 2019 at 14:50, Warin <<a href="mailto:61sundowner@gmail.com" target="_blank" rel="noreferrer">61sundowner@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
<div class="m_4208478918330497156gmail-m_1968201865715469289moz-cite-prefix">On 15/08/19 14:16, Mateusz Konieczny
wrote:</div><blockquote type="cite">
<div>Main problem with such
definition is that strip of concrete/asphalt along shore<br>
</div>
<div>is not a beach.<br>
</div>
<div><br>
</div>
<div>I thought about dunes when I
claimed that "beach is not<br>
always unvegetated" but now I see that dunes are not considered
as part of the beach.</div>
<div><br>
</div>
<div>I copied definition from
Wikipedia as it seemed far better as it managed to<br>
</div>
<div>exclude stuff like <br>
</div>
<div><a href="https://commons.wikimedia.org/wiki/File:Sea_defences_%2821467789266%29.jpg" target="_blank" rel="noreferrer">https://commons.wikimedia.org/wiki/File:Sea_defences_(21467789266).jpg</a><br>
</div>
<div><br>
</div>
<div><a href="https://commons.wikimedia.org/wiki/File:Mole_in_Funchal,_Ponta_do_Garajau,_statue_of_Cristo_Rei_and_Desertas_Islands._Madeira,_Portugal.jpg" target="_blank" rel="noreferrer">https://commons.wikimedia.org/wiki/File:Mole_in_Funchal,_Ponta_do_Garajau,_statue_of_Cristo_Rei_and_Desertas_Islands._Madeira,_Portugal.jpg</a><br>
</div>
<div><br>
</div>
<div><a href="https://commons.wikimedia.org/wiki/File:Concrete_defences_by_the_Saxon_Shore_way_-_geograph.org.uk_-_1240179.jpg" target="_blank" rel="noreferrer">https://commons.wikimedia.org/wiki/File:Concrete_defences_by_the_Saxon_Shore_way_-_geograph.org.uk_-_1240179.jpg</a><br>
</div>
<div><br>
</div>
<div>Maybe copying previous
definition from natural=beach would be preferable.<br>
</div>
</blockquote>
<br>
Don't know .. hence my question here .. any 'beach' 'experts'? <br></div></blockquote><div><br></div><div>Lived beside them all my life so I'll have a go! </div><div><br></div><div>I'll agree with Mateusz that concrete & boulders aren't a beach - a couple of those examples I'd probably call man_made=groyne + natural=rock (& yes, that's because it then renders as rock!), however you can have (isolated) boulders on a beach.</div><div><br></div><div>What is a beach though is a bit tricky, especially for OSM.</div><div><br></div><div>It would usually be "the area above the Low Tide mark" but that then clashes with OSM Coastline, which is taken as the High Tide mark, so that would then have to mean that the beach is </div><div><br></div><div>"The area between the High Tide mark & any adjoining vegetation / structures / landforms". It's usually largely unvegetated (but may have isolated trees, clumps of grass etc), & is made up of natural materials such as sand, pebbles, shells etc"</div><div><br></div><div>How's that sound?</div><div><br></div><div>Thanks<div><br></div><div>Graeme</div></div></div></div>
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</blockquote></div>