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<P class=MsoNormal style="MARGIN: 0in 0in 0pt">Unlike an empirically-derived
datum transformation (e.g. WGS <> ITRF), which can have different levels
of "accuracy" depending how it was derived, a map projection (lat/lon <>
N/E) is defined mathematically and is precise, i.e. without error. <SPAN
style="mso-spacerun: yes"> </SPAN>Having said that, there are better and
worse algorithms for UTM, but that's not the question you're asking. <SPAN
style="mso-spacerun: yes"> </SPAN>In a datum transformation sense UTM will
always be as (and only as) "accurate" as the geographicals you convert to N/E.
<SPAN style="mso-spacerun: yes"> </SPAN>So, use EPSG:326XX and EPSG327XX,
but plug in your precise geographicals. <SPAN
style="mso-spacerun: yes"> </SPAN></P>
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<DIV style="font-color: black"><B>From:</B> <A title=j1@jimenezshaw.com
href="mailto:j1@jimenezshaw.com">Javier Jimenez Shaw</A> </DIV>
<DIV><B>Sent:</B> Saturday, April 17, 2021 2:44 PM</DIV>
<DIV><B>To:</B> <A title=PROJ@lists.osgeo.org
href="mailto:PROJ@lists.osgeo.org">proj</A> </DIV>
<DIV><B>Subject:</B> [PROJ] World UTM in a proper datum</DIV></DIV></DIV>
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<DIV dir=ltr>Hi
<DIV> </DIV>
<DIV>Maybe there is a better place to talk about this, but I do not know which
one. I hope somebody from EPSG is reading this, and may give me a clue.</DIV>
<DIV> </DIV>
<DIV>We have talked many times about the lack of accuracy of WGS84 (EPSG:4326),
the datum ensemble, etc.</DIV>
<DIV>The problem is that I miss an accurate equivalent of the projected family
"WGS84 / UTM zone XXY"(EPSG:326XX and EPSG327XX) for XX between 1 and 60 and Y
is N or S. It would be nice something similar (a worldwide projected CRSs on
UTM), but over a proper accurate and well defined geographic CRS (ITRF2014,
WGS84(G1762), etc).</DIV>
<DIV> </DIV>
<DIV>Do you know if there is any plan? Or do they exist and I was not able to
find them?</DIV>
<DIV> </DIV>
<DIV>Thanks.<BR clear=all>
<DIV>
<DIV class=gmail_signature dir=ltr data-smartmail="gmail_signature">.___ ._ ..._
.. . ._. .___ .. __ . _. . __.. ... .... ._ .__<BR>Entre dos
pensamientos racionales <BR>hay infinitos pensamientos
irracionales.<BR><BR></DIV></DIV></DIV></DIV>
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