<div dir="ltr"><div>Thank you very much Even, it seems to work perfectly:<br><br></div><div>echo 578174.247 3593725.312 1295.083 2010.0 | cct +proj=pipeline +step +inv +proj=utm +zone=11 +ellps=WGS84 +step +proj=vgridshift +grids=/nubes/geoides/GGM10_GEO.gtx +step +proj=utm +zone=11 +ellps=WGS84<br> 578174.2470 3593725.3120 1329.6219 2010.0000</div><div><br></div><div>Ulises<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">El vie, 22 mar 2024 a las 13:30, Even Rouault (<<a href="mailto:even.rouault@spatialys.com">even.rouault@spatialys.com</a>>) escribió:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><u></u>
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<p><br>
</p>
<div>Le 22/03/2024 à 20:24, Ulises Ibarra
via PROJ a écrit :<br>
</div>
<blockquote type="cite">
<div dir="ltr">Hello:<br>
Continuing with the attempt to change from ellipsoidal heights
to orthometric heights. I executed the instruction:<br>
<div><br>
</div>
<div>echo 578174.247 3593725.312 1295.083 2010.0 | cct
+proj=pipeline +step +inv +proj=utm +zone=11 +ellps=WGS84
+step +proj=utm +zone=11 +ellps=WGS84 +proj=vgridshift
+grids=/nubes/geoides/GGM10_GEO.gtx<br>
578174.2470 3593725.3120 1295.0830 2010.0000</div>
</div>
</blockquote>
<p>Steps 2 and 3 should be inverted, and here's a missing +step
keyword. It should rather be something like <br>
</p>
<p>+proj=pipeline +step +inv +proj=utm +zone=11 +ellps=WGS84 +step
+proj=vgridshift +grids=/nubes/geoides/GGM10_GEO.gtx +step
+proj=utm +zone=11 +ellps=WGS84 <br>
</p>
<br>
<p>Even<span style="white-space:pre-wrap">
</span></p>
<pre cols="72">--
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My software is free, but my time generally not.</pre>
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</blockquote></div>