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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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cite="mid:CAP4zaXpOEBMNC_bc6O12F_eFEyHMigV52row5Cnxm6XJYn6Xww@mail.gmail.com">
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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>
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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>
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    <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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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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            <div>On 29/3/23 14:30, Andrew Harvey wrote:<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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                      <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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