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<p>Thanks Bruce, answers to comments below. (Longer version in the
paper linked at the end)<br>
</p>
<div class="moz-cite-prefix">On 17/7/19 12:15 pm, Bruce Bannerman
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:5673EF76-6AED-41B1-8DD9-1A8F109FEB67@gmail.com">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
OK by me Cameron.
<div class=""><br class="">
</div>
<div class="">As an aside:<br class="">
<div class=""><br class="">
</div>
<div class="">
<ul class="MailOutline">
<li class="">I have not heard WGS84 referred to as a dynamic
datum before. I do know of several WGS 84 Epochs though.
This dynamic datum issue will not be a simple issue to
resolve.</li>
</ul>
</div>
</div>
</blockquote>
<p>WGS84 is earth fixed, which means a feature's coordinates
described in WGS84 will shift over time, in line with tectonic
plate shift.</p>
<p>Yes, WGS84 has had 6 "realisations" to date, but these have been
refinements to the alignment of the WGS84 ellipsoid. It doesn't
account for tectonic plate shift.<br>
</p>
<blockquote type="cite"
cite="mid:5673EF76-6AED-41B1-8DD9-1A8F109FEB67@gmail.com">
<div class="">
<div class=""><br class="">
</div>
<div class="">
<ul class="MailOutline">
<li class="">Personally, I don’t believe that it will be
viable for many, many years (if ever) to manage our data
within the context of a dynamic data as is proposed by
some. <br>
</li>
</ul>
</div>
</div>
</blockquote>
Storing in the time dependent ITRF or ATRF is a separate issue to
what is being discussed in this paper.<br>
<blockquote type="cite"
cite="mid:5673EF76-6AED-41B1-8DD9-1A8F109FEB67@gmail.com">
<div class="">
<div class=""><br class="">
</div>
<div class="">
<ul class="MailOutline">
<li class="">As a former spatial data manager with a data
inventory in the PB, I believe that it is just too
impractical currently to use a dynamic datum to control
our vast global holdings and software. <br>
</li>
</ul>
</div>
</div>
</blockquote>
A static datum can be used still. The important thing is we need to
know whether we are using static or dynamic and not get them
confused.<br>
<blockquote type="cite"
cite="mid:5673EF76-6AED-41B1-8DD9-1A8F109FEB67@gmail.com">
<div class="">
<div class=""><br class="">
</div>
<div class="">
<ul class="MailOutline">
<li class="">When we consider the widespread, global
ignorance of the need to manage and utilse data within an
appropriate SRS framework, it is an issue that will not be
resolved either easily, or in the short term.</li>
</ul>
</div>
</div>
</blockquote>
Yes, very hard problem. One that is very important to solve. Odds of
success are tough. Challenge accepted. :)<br>
<blockquote type="cite"
cite="mid:5673EF76-6AED-41B1-8DD9-1A8F109FEB67@gmail.com">
<div class="">
<div class=""><br class="">
</div>
<div class=""><br class="">
<div class=""><br class="">
</div>
<div class="">
<div class="">@Standards list,</div>
</div>
<div class=""><br class="">
</div>
<div class="">FOR ACTION:</div>
<div class=""><br class="">
</div>
<div class="">We have one spare OGC Membership slot avalable
currently.</div>
<div class=""><br class="">
</div>
<div class="">Do we have any objections to Cameron using this
slot?</div>
<div class=""><br class="">
</div>
<div class="">If so, please advise this list by 1400hr 24th
July 2019 UTC and I’ll start a selection process. If not,
I’ll advise OGC of Cameron’s nomination for this slot.</div>
<div class=""><br class="">
</div>
<div class="">Kind regards,</div>
<div class=""><br class="">
</div>
<div class="">Bruce Bannerman</div>
<div class=""><br class="">
<div><br class="">
<blockquote type="cite" class="">
<div class="">On 14 Jul 2019, at 08:20, Cameron Shorter
<<a href="mailto:cameron.shorter@gmail.com"
class="" moz-do-not-send="true">cameron.shorter@gmail.com</a>>
wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
<div dir="ltr" class="">Hi OSGeo standards folks,
<div class="">I'd like to request access to one of
OSGeo's OGC standards slots. From now until the
end of the year, I'm planning to help address a
problem with web-mapping. </div>
<div class=""><br class="">
</div>
<div class="">The world is using the dynamic WGS84
datum as it were static - which is resulting in
map misalignment problems. This is an
international problem, which should be done with
the collaboration of the OGC, and I'd like to
engage within OGC forums as part of this.</div>
<div class=""><br class="">
</div>
<div class="">A more detailed description of the
problem is here:</div>
<div class=""><a
href="https://docs.google.com/document/d/15uBX2qICODRkiHXeksT0zEy6TuysanIxuc4anV0o5F0"
class="" moz-do-not-send="true">https://docs.google.com/document/d/15uBX2qICODRkiHXeksT0zEy6TuysanIxuc4anV0o5F0</a><br
class="" clear="all">
<div class=""><br class="">
</div>
-- <br class="">
<div dir="ltr" class="gmail_signature"
data-smartmail="gmail_signature">
<div dir="ltr" class="">
<div class="">
<div dir="ltr" class="">
<div dir="ltr" class="">
<div dir="ltr" class="">
<div dir="ltr" class="">
<div dir="ltr" class="">
<div class="">
<div class=""><span
style="font-size:12.8px"
class="">Cameron Shorter</span><br
class="">
</div>
<div class="">Technology
Demystifier</div>
<div class="">Open Technologies
and Geospatial Consultant</div>
<div class=""><br class="">
</div>
<div class="">M +61 (0) 419 142
254</div>
<div class=""><br class="">
</div>
</div>
<div class=""><br class="">
<br class="">
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
_______________________________________________<br
class="">
Standards mailing list<br class="">
<a href="mailto:Standards@lists.osgeo.org" class=""
moz-do-not-send="true">Standards@lists.osgeo.org</a><br
class="">
<a class="moz-txt-link-freetext" href="https://lists.osgeo.org/mailman/listinfo/standards">https://lists.osgeo.org/mailman/listinfo/standards</a></div>
</blockquote>
</div>
<br class="">
</div>
</div>
</div>
</blockquote>
<pre class="moz-signature" cols="72">--
Cameron Shorter
Technology Demystifier
Open Technologies and Geospatial Consultant
M +61 (0) 419 142 254</pre>
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