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<p>Analysis and fix in <a class="moz-txt-link-freetext" href="https://github.com/OSGeo/PROJ/pull/4676">https://github.com/OSGeo/PROJ/pull/4676</a></p>
<div class="moz-cite-prefix">Le 21/02/2026 à 19:31, Javier Jimenez
Shaw via PROJ a écrit :<br>
</div>
<blockquote type="cite"
cite="mid:CADRrdKu=yqnYuitxesyz7w9+ptqTyUh=1pK3=J7sAQ7j2qSVfQ@mail.gmail.com">
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<div>
<div>Hi</div>
<div><br>
</div>
<div>Just testing something else, I tried this transformation
to go test that the grids are properly used.</div>
<div>In master this seems to be wrong</div>
<div><br>
</div>
<div><span style="font-family:monospace">echo 52 5 0 |
PROJ_DATA=data/ PROJ_NETWORK=ON ./bin/cs2cs <a class="moz-txt-link-freetext" href="EPSG:4326+3855">EPSG:4326+3855</a>
<a class="moz-txt-link-freetext" href="EPSG:7415">EPSG:7415</a></span></div>
<span style="font-family:monospace">128410.09 445806.51 -43.41<br>
</span>
<div><span style="font-family:monospace"><br>
</span></div>
<div>
<div><span style="font-family:monospace">./bin/cs2cs</span></div>
<span style="font-family:monospace">Rel. 9.8.0, March 2nd,
2026<br>
</span><br>
</div>
<div>While in the native cs2cs in Ubuntu 24.04 makes more
sense. Just 20 cm difference between EGM2008 and NAP height.</div>
<br>
<div><span style="font-family:monospace">echo 52 5 0 |
PROJ_NETWORK=ON cs2cs <a class="moz-txt-link-freetext" href="EPSG:4326+3855">EPSG:4326+3855</a> <a class="moz-txt-link-freetext" href="EPSG:7415">EPSG:7415</a></span></div>
<span style="font-family:monospace">128410.10 445806.50 0.20<br>
<br>
cs2cs<br>
Rel. 9.4.0, March 1st, 2024<br>
</span><br>
</div>
<div>The first pipeline of the projinfo are ... the same? I
don't understand</div>
<div><br>
</div>
<div><span style="font-family:monospace">PROJ_NETWORK=ON
projinfo -s <a class="moz-txt-link-freetext" href="EPSG:4326+3855">EPSG:4326+3855</a> -t <a class="moz-txt-link-freetext" href="EPSG:7415">EPSG:7415</a> -o proj --bbox
5,52,5.1,52.1<br>
Candidate operations found: 2<br>
-------------------------------------<br>
Operation No. 1:<br>
<br>
unknown id, Inverse of WGS 84 to EGM2008 height (1) +
Inverse of ETRS89 to WGS 84 (1) + ETRS89 to NAP height (2) +
Inverse of Amersfoort to ETRS89 (9) + RD New, 2.002 m,
Netherlands - onshore, including Waddenzee, Dutch Wadden
Islands and 12-mile offshore coastal zone.<br>
<br>
PROJ string:<br>
+proj=pipeline<br>
+step +proj=axisswap +order=2,1<br>
+step +proj=unitconvert +xy_in=deg +xy_out=rad<br>
+step +proj=vgridshift +grids=us_nga_egm08_25.tif
+multiplier=1<br>
+step +inv +proj=vgridshift +grids=nl_nsgi_nlgeo2018.tif
+multiplier=1<br>
+step +inv +proj=hgridshift +grids=nl_nsgi_rdtrans2018.tif<br>
+step +proj=sterea +lat_0=52.1561605555556
+lon_0=5.38763888888889 +k=0.9999079<br>
+x_0=155000 +y_0=463000 +ellps=bessel<br>
<br>
-------------------------------------<br>
Operation No. 2:</span><br>
<br>
</div>
<div><br>
</div>
<div><span style="font-family:monospace">PROJ_DATA=data/
PROJ_NETWORK=ON ./bin/projinfo -s <a class="moz-txt-link-freetext" href="EPSG:4326+3855">EPSG:4326+3855</a> -t
<a class="moz-txt-link-freetext" href="EPSG:7415">EPSG:7415</a> -o proj --bbox 5,52,5.1,52.1<br>
Candidate operations found: 6<br>
-------------------------------------<br>
Operation No. 1:<br>
<br>
unknown id, Inverse of WGS 84 to EGM2008 height (1) +
Inverse of ETRS89-NLD [AGRS2010] to WGS 84 (1) + ETRS89-NLD
[AGRS2010] to NAP height (2) + Inverse of Amersfoort to
ETRS89-NLD [AGRS2010] (9) + RD New, 1.123 m, Netherlands -
onshore and offshore.<br>
<br>
PROJ string:<br>
+proj=pipeline<br>
+step +proj=axisswap +order=2,1<br>
+step +proj=unitconvert +xy_in=deg +xy_out=rad<br>
+step +proj=vgridshift +grids=us_nga_egm08_25.tif
+multiplier=1<br>
+step +inv +proj=vgridshift +grids=nl_nsgi_nlgeo2018.tif
+multiplier=1<br>
+step +inv +proj=hgridshift +grids=nl_nsgi_rdtrans2018.tif<br>
+step +proj=sterea +lat_0=52.1561605555556
+lon_0=5.38763888888889 +k=0.9999079<br>
+x_0=155000 +y_0=463000 +ellps=bessel<br>
<br>
-------------------------------------<br>
Operation No. 2:<br>
</span><br>
</div>
<div>If my tests are correct, and I had to guess, I would say it
is a consequence of the new ETRS89 ensemble.</div>
<div><br>
</div>
<div>Cheers,</div>
<div>Javier.</div>
</div>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
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</blockquote>
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