<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Coincidentally, there’s a blog post about this topic regarding OSM here:<div class=""><a href="https://www.openstreetmap.org/user/StephaneP/diary/390290" class="">https://www.openstreetmap.org/user/StephaneP/diary/390290</a></div><div class=""><br class=""><div>Discussion on Hacker News:</div><div><a href="https://news.ycombinator.com/item?id=20460596" class="">https://news.ycombinator.com/item?id=20460596</a></div><div><br class=""></div><div><br class=""><blockquote type="cite" class=""><div class="">On Jul 17, 2019, at 1:04 PM, Cameron Shorter <<a href="mailto:cameron.shorter@gmail.com" class="">cameron.shorter@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><p style="caret-color: rgb(0, 0, 0); font-family: GeezaPro; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration: none;" class="">Thanks Bruce, answers to comments below. (Longer version in the paper linked at the end)<br class=""></p><div class="moz-cite-prefix" style="caret-color: rgb(0, 0, 0); font-family: GeezaPro; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration: none;">On 17/7/19 12:15 pm, Bruce Bannerman wrote:<br class=""></div><blockquote type="cite" cite="mid:5673EF76-6AED-41B1-8DD9-1A8F109FEB67@gmail.com" style="font-family: GeezaPro; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration: none;" class="">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 style="caret-color: rgb(0, 0, 0); font-family: GeezaPro; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration: none;" class="">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 style="caret-color: rgb(0, 0, 0); font-family: GeezaPro; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration: none;" class="">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 class=""></p><blockquote type="cite" cite="mid:5673EF76-6AED-41B1-8DD9-1A8F109FEB67@gmail.com" style="font-family: GeezaPro; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration: none;" class=""><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.<span class="Apple-converted-space"> </span><br class=""></li></ul></div></div></blockquote><span style="caret-color: rgb(0, 0, 0); font-family: GeezaPro; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration: none; float: none; display: inline !important;" class="">Storing in the time dependent ITRF or ATRF is a separate issue to what is being discussed in this paper.</span><br style="caret-color: rgb(0, 0, 0); font-family: GeezaPro; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration: none;" class=""><blockquote type="cite" cite="mid:5673EF76-6AED-41B1-8DD9-1A8F109FEB67@gmail.com" style="font-family: GeezaPro; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration: none;" class=""><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.<span class="Apple-converted-space"> </span><br class=""></li></ul></div></div></blockquote><span style="caret-color: rgb(0, 0, 0); font-family: GeezaPro; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration: none; float: none; display: inline !important;" class="">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.</span><br style="caret-color: rgb(0, 0, 0); font-family: GeezaPro; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration: none;" class=""><blockquote type="cite" cite="mid:5673EF76-6AED-41B1-8DD9-1A8F109FEB67@gmail.com" style="font-family: GeezaPro; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration: none;" class=""><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><span style="caret-color: rgb(0, 0, 0); font-family: GeezaPro; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration: none; float: none; display: inline !important;" class="">Yes, very hard problem. One that is very important to solve. Odds of success are tough. Challenge accepted. :)</span><br style="caret-color: rgb(0, 0, 0); font-family: GeezaPro; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration: none;" class=""><blockquote type="cite" cite="mid:5673EF76-6AED-41B1-8DD9-1A8F109FEB67@gmail.com" style="font-family: GeezaPro; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration: none;" class=""><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 class=""><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>--<span class="Apple-converted-space"> </span><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 class="" style="font-size: 12.8px;">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" style="caret-color: rgb(0, 0, 0); font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration: none;">--
Cameron Shorter
Technology Demystifier
Open Technologies and Geospatial Consultant
M +61 (0) 419 142 254</pre><span style="caret-color: rgb(0, 0, 0); font-family: GeezaPro; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration: none; float: none; display: inline !important;" class="">_______________________________________________</span><br style="caret-color: rgb(0, 0, 0); font-family: GeezaPro; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: GeezaPro; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration: none; float: none; display: inline !important;" class="">Standards mailing list</span><br style="caret-color: rgb(0, 0, 0); font-family: GeezaPro; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration: none;" class=""><a href="mailto:Standards@lists.osgeo.org" style="font-family: GeezaPro; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);" class="">Standards@lists.osgeo.org</a><br style="caret-color: rgb(0, 0, 0); font-family: GeezaPro; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration: none;" class=""><a href="https://lists.osgeo.org/mailman/listinfo/standards" style="font-family: GeezaPro; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);" class="">https://lists.osgeo.org/mailman/listinfo/standards</a></div></blockquote></div><br class=""></div></body></html>