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<div class="moz-cite-prefix">On 1/4/23 09:50, Graeme Fitzpatrick
wrote:<br>
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cite="mid:CAP4zaXpOEBMNC_bc6O12F_eFEyHMigV52row5Cnxm6XJYn6Xww@mail.gmail.com">
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<div>Don't know if this helps. or makes it worse!</div>
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<p>More data = good. <br>
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<p>The fact that the data is confusing, to me, simply means that a
simple assumptions of using the high tide as the boundary for all
is a problem. <br>
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<p><br>
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<div>Had a thought so looked at Gold Coast Council's online city
plan, where I know that a National Park touches the shore: <br>
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<div><a
href="https://cityplan.goldcoast.qld.gov.au/eplan/property/41NPW429/0/184?_t=property"
moz-do-not-send="true" class="moz-txt-link-freetext">https://cityplan.goldcoast.qld.gov.au/eplan/property/41NPW429/0/184?_t=property</a>
<br>
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<div>compared to what we have</div>
<div><a
href="https://www.openstreetmap.org/edit#map=18/-28.09018/153.45895"
moz-do-not-send="true" class="moz-txt-link-freetext">https://www.openstreetmap.org/edit#map=18/-28.09018/153.45895</a></div>
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<div>Darker green on Council map is NP, bright green is Council
Public Open Space, patch of ocean is Council "ground", which
we show as being within the Admin Boundary of Gold Coast City
based on PSMA Admin Boundaries, but which is also "outside"
the Australian "coastline"?</div>
<div><br>
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<div>Other spots on the GC show similar, in that there is a
discrepancy, & often an overlap, between Council &
State boundaries.<br>
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<p>Umm State seaward boundaries should be 3 nautical miles seaward
from the 'coastline' (~5.5 km). I forget if that 'coastline' used
is high or low tidal stuff. <br>
</p>
<p>You should be able to see the OSM state boundary here
<a class="moz-txt-link-freetext" href="https://www.openstreetmap.org/relation/13056696#map=13/-28.0814/153.5054">https://www.openstreetmap.org/relation/13056696#map=13/-28.0814/153.5054</a><br>
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<p>Council boundaries should be a lot closer to the coast(which ever
one you chose)?<br>
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<blockquote type="cite"
cite="mid:CAP4zaXpOEBMNC_bc6O12F_eFEyHMigV52row5Cnxm6XJYn6Xww@mail.gmail.com"><br>
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<div dir="ltr" class="gmail_attr">On Fri, 31 Mar 2023 at 18:14,
Warin <<a href="mailto:61sundowner@gmail.com"
moz-do-not-send="true" class="moz-txt-link-freetext">61sundowner@gmail.com</a>>
wrote:<br>
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0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<div>On 29/3/23 14:30, Andrew Harvey wrote:<br>
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<div dir="ltr"><br>
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<div dir="ltr" class="gmail_attr">On Wed, 29 Mar 2023
at 14:05, OSM via Talk-au <<a
href="mailto:talk-au@openstreetmap.org"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">talk-au@openstreetmap.org</a>>
wrote:<br>
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0px 0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
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<p>Since the coastline tag is also supposed to
represent the high water mark then I would say
that they should be snapped together (since they
then represent the same feature - that is, the
high water mark). This would mean that the
boundary data already in OSM from the government
basemaps would just be their own mapping of the
high water mark, and probably be less up to date
or refined as our own.</p>
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<div>Exactly. So if anything we should be
actively snapping them.</div>
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<p>Are there any links to these boundaries linked to the
high water mark??? <br>
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<p><br>
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<p>I would have though that CAPAD data would be accurate as
it should come from the National Parks people using the
gazette.</p>
<p><br>
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<p>My trove searches only turned up low water mark stuff -
but I only looked in NSW. <br>
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