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<p>Thanks Doug, you have pointed me to Matt Higgins who is one of
the Australians on this email's CC list. He has contributed toward
identifying this problem. I believe we need to bring this
conversation into an international forum, probably headed up by
the OGC.</p>
<p>You might be able to suggest who we should connect with? <br>
</p>
<p>Warm regards, Cameron<br>
</p>
<div class="moz-cite-prefix">On 24/6/19 11:30 pm, Newcomb, Doug
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CALQGVr3-FK18wy4yFO1-vjTLnOMfVG_VAQDjmqVWXTKcRZh29g@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">Cameron,
<div> I just emailed someone working on this . He sent me the
links below. </div>
<div><br>
</div>
<div>
<div class="gmail-gE gmail-iv gmail-gt" style="padding:20px
0px
0px;font-size:0.875rem;font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif">
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style="border-collapse:collapse;margin-top:0px;width:auto;font-size:0.875rem;letter-spacing:0.2px;display:block"
cellpadding="0">
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<div class="gmail-"
style="font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:medium">
<div id="gmail-:41m" class="gmail-ii gmail-gt gmail-adO"
style="font-size:0.875rem;direction:ltr;margin:8px 0px
0px;padding:0px">
<div id="gmail-:41l" class="gmail-a3s gmail-aXjCH"
style="overflow:hidden;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:small;line-height:1.5;font-family:Arial,Helvetica,sans-serif"><a
href="https://www.gps.gov/governance/advisory/"
rel="noreferrer" target="_blank"
moz-do-not-send="true">https://www.gps.gov/governance/advisory/</a><br>
<br>
<a
href="https://www.gps.gov/governance/advisory/members/higgins/"
rel="noreferrer" target="_blank"
moz-do-not-send="true">https://www.gps.gov/governance/advisory/members/higgins/</a></div>
<div id="gmail-:41l" class="gmail-a3s gmail-aXjCH"
style="overflow:hidden;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:small;line-height:1.5;font-family:Arial,Helvetica,sans-serif"><br>
</div>
<div id="gmail-:41l" class="gmail-a3s gmail-aXjCH"
style="overflow:hidden;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:small;line-height:1.5;font-family:Arial,Helvetica,sans-serif">Doug</div>
</div>
</div>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Thu, Jun 20, 2019 at 5:15
PM Cameron Shorter <<a
href="mailto:cameron.shorter@gmail.com"
moz-do-not-send="true">cameron.shorter@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 dir="ltr">
<div>Hi folks,<br>
<br>
Our Australian spatial data users are about to face a
systematic mismatch challenge when trying to use multiple
static datums (GDA2020, GDA94) with the dynamic datum
(WGS84). At the moment, it is government agencies
grappling with the problem, but it is about to become a
mainstream issue.<br>
<br>
Australia now has static datums for the years 1994 and
2020 and uses WGS84 (a time-dependent datum!), for
web-mapping and web-services. We recognise:<br>
1. Transforming from GDA94 to GDA2020 reflects Australia’s
tectonic movement of ~ 1.8 metres to the North East.<br>
2. GDA94 was defined as ‘equal to WGS84’ in 1994.<br>
3. GDA2020 was defined as ‘equal to WGS84’ in 2020.<br>
All three statements can’t be accurate. It results in
mis-aligned maps in WGS84<br>
<br>
I believe this is a problem the whole world needs to
address, given the upcoming modernsation of significant
national datums including the U.S and we need to bring
this topic into an international conversation, ASAP.<br>
I'm interested to know if anyone here is looking into
and/or has opinions on how it should be solved. I'd like
to incorporate your ideas into the recommendations that we
are putting foward.<br>
<div>-- <br>
</div>
<div dir="ltr"
class="gmail-m_-6873679771758165188gmail_signature">
<div dir="ltr">
<div>
<div dir="ltr">
<div dir="ltr">
<div dir="ltr">
<div dir="ltr">
<div dir="ltr">
<div>
<div><span style="font-size:12.8px">Cameron
Shorter</span><br>
</div>
<div>Technology Demystifier</div>
<div>Open Technologies and Geospatial
Consultant</div>
<div><br>
</div>
<div>M +61 (0) 419 142 254</div>
<div><br>
</div>
</div>
<div><br>
<br>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
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</blockquote>
</div>
<br clear="all">
<div><br>
</div>
-- <br>
<div dir="ltr" class="gmail_signature">
<div dir="ltr">
<div>
<div dir="ltr">
<div>
<div dir="ltr">
<div dir="ltr">
<div>
<div>Doug Newcomb - Cartographer</div>
<div>USFWS</div>
<div>551F Pylon Dr</div>
<div>Raleigh, NC</div>
<div>919-856-4520 ext. 14 <a
href="mailto:doug_newcomb@fws.gov"
target="_blank" moz-do-not-send="true">doug_newcomb@fws.gov</a></div>
<div>---------------------------------------------------------------------------------------------------------</div>
<div><br>
</div>
</div>
<div><b style="font-size:12.8px"><i><font
color="#0000ff">NOTE: This email
correspondence and any attachments to and
from this sender is subject to the Freedom
of Information Act (FOIA) and may be
disclosed to third parties.</font></i></b><span
style="color:rgb(0,0,255);font-family:"courier
new",monospace;font-size:12.8px"></span><br>
</div>
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</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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