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<div class="moz-cite-prefix">Le 04/03/2026 à 18:09, Javier Jimenez
Shaw via PROJ a écrit :<br>
</div>
<blockquote type="cite"
cite="mid:CADRrdKsa5sBADfXQrBDB-2R532ZdSypZrHzCGuYXepoitNmCig@mail.gmail.com">
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<div>Hi Antonio.</div>
<br>
<div class="gmail_quote gmail_quote_container">
<div dir="ltr" class="gmail_attr">On Tue, 3 Mar 2026 at 19:25,
Antonio Valanzano via PROJ <<a
href="mailto:proj@lists.osgeo.org" moz-do-not-send="true"
class="moz-txt-link-freetext">proj@lists.osgeo.org</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">I
have used for the first time cs2cs and I have found not easy
to<br>
discover which transformation the sw uses for the
calculations.<br>
<br>
Here are my questions:<br>
<br>
1. Is it possible for cs2cs to output not only the results
but also<br>
the EPSG code of the transformation(s) used to produce the
output ?<br>
This information could be useful for users in order to have
more<br>
control over the transformations and avoid using the sw as a
black<br>
box.<br>
</blockquote>
<div><br>
</div>
<div>There is projinfo <a
href="https://proj.org/en/stable/apps/projinfo.html"
moz-do-not-send="true" class="moz-txt-link-freetext">https://proj.org/en/stable/apps/projinfo.html</a>
, that can give you similar information. But it would be
nice to have an option in cs2cs that prints the last
operation used calling "proj_trans_get_last_used_operation".</div>
<div>That way the user can know "exactly" the operation
performed.</div>
</div>
</div>
</blockquote>
$ echo 49 15 | PROJ_NETWORK=ON PROJ_DEBUG=2 bin/cs2cs <a class="moz-txt-link-freetext" href="EPSG:4258">EPSG:4258</a>
<a class="moz-txt-link-freetext" href="EPSG:5514+8357">EPSG:5514+8357</a> --3d<br>
[...]<br>
Using coordinate operation ETRS89 to S-JTSK / Krovak East North +
Baltic 1957 height<br>
[...]<br>
-717321.47 -1168433.34 -46.13<br>
<blockquote type="cite"
cite="mid:CADRrdKsa5sBADfXQrBDB-2R532ZdSypZrHzCGuYXepoitNmCig@mail.gmail.com">
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<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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