<div dir="ltr">On Fri, Jul 12, 2019 at 12:40 PM <<a href="mailto:wambacher@posteo.de">wambacher@posteo.de</a>> wrote:<br>> The old coastline (August 2018) is blue and the current coastal line<br>> is red.<br><br>The blue shows what I was talking about earlier where some of the<br>coastline was at MLWL and some was all the way up at the sea wall<br>(exceptionally high tide).<br><br>> The affected areas are wetlands, whose "coastline" is very complex. In<br>> my opinion, the problem is that this "coastline" is not static,<br>> because it is a natural runoff that will never be stable. It will look<br>> quite different after several months.<br><br>I am familiar with this area. Those areas are salt marshes and much more<br>stable than you might think. The main change that has happened over the<br>past ten years in this area is the high water marks have receded. This<br>is reflected in the most recent OS data that I've used. Those inlets are<br>deep tidal channels and definitely should be on the map. A smoothed<br>coastline would be a huge loss in this area.<br><br>The bits that would change a lot more are the low water levels because<br>this land is comprised of soft mud and sand. Unfortunately none of the<br>aerial imagery we have available cover these vast tidal flats. Most cut<br>off at the "coastline" (high water level).<br><br>Borbus.<br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Jul 12, 2019 at 12:40 PM <<a href="mailto:wambacher@posteo.de">wambacher@posteo.de</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">
<p>Hi,</p>
<p>I don't think you should accept this data.</p>
see:
<a class="gmail-m_-1657702485397195481moz-txt-link-freetext" href="https://wambachers-osm.website/images/osm/snaps_2019/strange_coastline.png_2019/strange_coastline.png" target="_blank">https://wambachers-osm.website/images/osm/snaps_2019/strange_coastline.png_2019/strange_coastline.png</a><br>
<br>
The old coastline (August 2018) is blue and the current coastal line
is red.<br>
<p>The affected areas are wetlands, whose "coastline" is very
complex. In my opinion, the problem is that this "coastline" is
not static, because it is a natural runoff that will never be
stable. It will look quite different after several months.</p>
<p>A manually smoothed coastline (better than the one from 2018)
would be appropriate.<br>
</p>
<p>ym2c from germany.</p>
<p>walter<br>
</p>
Translated with <a class="gmail-m_-1657702485397195481moz-txt-link-abbreviated" href="http://www.DeepL.com/Translator" target="_blank">www.DeepL.com/Translator</a><br>
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