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<div class="moz-cite-prefix">On 1/23/21 1:05 PM, Roger Bivand wrote:<br>
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<blockquote type="cite"
cite="mid:6ce77ce3-e494-d833-af3a-a97467130c4@reclus.nhh.no">On
Sat, 23 Jan 2021, Micha Silver wrote:
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Roger:
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Yes, but the exceptions for WGS84, NAD83 and NAD27 are just that,
exceptions from the general rule of +datum= being dropped. The
next road bump will occcur soon(ish) because WGS84 is an ensemble
of datum specifications, not a unique specification, and PROJ
7.2.0 is starting to address this: <a class="moz-txt-link-freetext" href="https://proj.org/news.html">https://proj.org/news.html</a>
(Update to EPSG 10.003 and make code base robust to dealing with
WKT CRS with DatumEnsemble (#2370)). The link to
<a class="moz-txt-link-freetext" href="https://github.com/OSGeo/PROJ/pull/2370">https://github.com/OSGeo/PROJ/pull/2370</a> gives details.
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Unless you need sub-metre accuracy, this may not matter, but if
different parts of the world use different WGS84 definitions (at
different times), the s2 package may be more stable though a
little less accurate.
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<p>Sub meter accuracy is definitely not an issue in our use case.
The microwave antennas are from 1-12 km apart. We need the list of
antennas that are within a radius of about 15 km. Missing one
antenna that is, on a sphere, a few 10's of meters too far is of
no consequence here.<br>
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<blockquote type="cite"
cite="mid:6ce77ce3-e494-d833-af3a-a97467130c4@reclus.nhh.no">This
is more detail than you expected, I think, but at least it is a
way of documenting things.
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<p>Well, like you said, you can't get the sweet potatoes back after
cooking orange vegetable soup.</p>
<p>:-)</p>
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<blockquote type="cite"
cite="mid:6ce77ce3-e494-d833-af3a-a97467130c4@reclus.nhh.no">Roger
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If this isn't a reprex, please extend briefly.
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Roger
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Thanks again,
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Regards, Micha
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<pre class="moz-signature" cols="72">--
Micha Silver
Ben Gurion Univ.
Sde Boker, Remote Sensing Lab
cell: +972-523-665918</pre>
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