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<blockquote type="cite"
cite="mid:0f7254d5-2cec-917f-82bf-c1e73ea29d01@spatialys.com">
<p>That said in the database, ETRS89 is modeled as a datum
ensemble of the many ETRFxxxx realizations, so potentially PROJ
could use that information to infer a null transformation
between ETRS89 and ETRF2000 with the accuracy of the datum
ensemble (here 0.1 m) (we actually do that manually for the WGS
84 datum ensemble vs its realizations, but that should be
generalized), and chain that together with the RDN2008 to ETRS89
transformation.</p>
</blockquote>
I've implemented that per <a class="moz-txt-link-freetext" href="https://github.com/OSGeo/PROJ/pull/3266">https://github.com/OSGeo/PROJ/pull/3266</a>.
So now you get<br>
<blockquote type="cite"
cite="mid:0f7254d5-2cec-917f-82bf-c1e73ea29d01@spatialys.com"><br>
<p>$ projinfo -s RDN2008 -t ETRF2000 <br>
Candidate operations found: 1<br>
-------------------------------------<br>
Operation No. 1:<br>
<br>
unknown id, RDN2008 to ETRS89 (1) + ETRS89 to ETRF2000, 0.1 m,
Italy - onshore and offshore; San Marino, Vatican City State.<br>
<br>
PROJ string:<br>
+proj=noop<br>
</p>
<p>Even<br>
<br>
</p>
<div class="moz-cite-prefix">Le 19/07/2022 à 03:02, Giacomo
Cappellini a écrit :<br>
</div>
<blockquote type="cite"
cite="mid:CABXJd1nWgMuwZMOUwRNSR9v-4cjs_vAdzpNZ2F3jszqO9+WG=A@mail.gmail.com">
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charset=UTF-8">
<div dir="ltr">
<div>Hello,</div>
<div><br>
</div>
<div>I'm generally new to working with CRS different from
EPSG:4326 <a class="gmail_plusreply"
id="gmail-m_2346281136540197199plusReplyChip-0"
moz-do-not-send="true">+</a> UTM and I'm facing some
issues while trying to use RDN2008, which is the official
reference system for Italy at current date.</div>
<div>Please excuse me if the question sounds trivial to
experts, but I can't figure out why there are no
non-ballpark operations to go from/to RDN2008 and ETRF2000
or ITRF2000.</div>
<div><br>
</div>
<div>Afaik, RDN2008 is ETRS89 realization ETRF2000 epoch
2008.0.<br>
</div>
<div><br>
</div>
<div>Proj Rel. 8.2.1, January 1st, 2022</div>
<div><br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">$ projinfo -s EPSG:6706
-t EPSG:9067 --spatial-test intersects --grid-check none
--hide-ballpark --summary<br>
Candidate operations found: 0</blockquote>
<div><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>$ projinfo -s EPSG:6706 -t EPSG:8997 --spatial-test
intersects --grid-check none --hide-ballpark --summary<br>
Candidate operations found: 0</div>
</blockquote>
<div><br>
</div>
<div>Thanks</div>
<div><br>
</div>
<div>G.C. <br>
</div>
</div>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
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</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
<a class="moz-txt-link-freetext" href="http://www.spatialys.com" moz-do-not-send="true">http://www.spatialys.com</a>
My software is free, but my time generally not.</pre>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
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</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
<a class="moz-txt-link-freetext" href="http://www.spatialys.com">http://www.spatialys.com</a>
My software is free, but my time generally not.</pre>
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