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<p>"ldd /path/to/bin/qgis | grep gdal" will show you where the qgis
binary links GDAL from</p>
<p>To convince an existing QGIS build to run against another
libgdal, you may (ab)use LD_LIBRARY_PATH, and you probably need to
create symlinks so that QGIS finds the right libgdal.X.Y that it
expects</p>
<p>Safer way is to build your own QGIS using cmake
-DGDAL_CONFIG:FILEPATH=/path/to/your/bin/gdal-config<br>
</p>
<div class="moz-cite-prefix">Le 23/09/2024 à 13:48, chris hermansen
via QGIS-User a écrit :<br>
</div>
<blockquote type="cite"
cite="mid:CACc2_69KVEqboWbf6S1RsOGt61N_isS1=5P9jyr299=6+RiWCw@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="auto">
<div>Andrew and list,<br>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Mon, Sep 23, 2024,
00:28 Andrew Plowright via QGIS-User <<a
href="mailto:qgis-user@lists.osgeo.org"
moz-do-not-send="true" class="moz-txt-link-freetext">qgis-user@lists.osgeo.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div>I do indeed:</div>
<div><br>
</div>
<div>/usr/bin/gdalinfo<br>
/bin/gdalinfo</div>
<div><br>
</div>
<div>I suppose that with the
-DCMAKE_INSTALL_PREFIX:PATH=/usr parameter, this means
that the version of GDAL that I built was in
/usr/bin/gdalinfo?</div>
</div>
</blockquote>
</div>
</div>
<div dir="auto"><br>
</div>
<div dir="auto">You can confirm positively by running each
version using the full path and check which one includes the
MrSID driver.</div>
<div dir="auto">
<div class="gmail_quote">
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div><br>
</div>
<div>Is there any way to determine where QGIS is looking
for GDAL? If that is indeed the problem, is there a
way to redirect QGIS towards a different installation
of GDAL?<br>
</div>
</div>
</blockquote>
</div>
</div>
<div dir="auto"><br>
</div>
<div dir="auto">Maybe this link can help as it offers solutions
to a similar-sounding problem</div>
<div dir="auto"><br>
</div>
<div dir="auto"><a
href="https://gis.stackexchange.com/questions/258314/handle-two-versions-of-gdal"
moz-do-not-send="true" class="moz-txt-link-freetext">https://gis.stackexchange.com/questions/258314/handle-two-versions-of-gdal</a></div>
<div dir="auto">
<div class="gmail_quote">
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div><br>
</div>
<div>Thanks!<br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Wed, Sep 18, 2024
at 5:04 PM Richard Greenwood <<a
href="mailto:richard.greenwood@gmail.com"
target="_blank" rel="noreferrer"
moz-do-not-send="true" class="moz-txt-link-freetext">richard.greenwood@gmail.com</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">
<p dir="ltr">What do you get from<br>
which -a gdalinfo<br>
You might have two versions installed. </p>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Wed, Sep 18,
2024, 4:03 PM Andrew Plowright via QGIS-User <<a
href="mailto:qgis-user@lists.osgeo.org"
target="_blank" rel="noreferrer"
moz-do-not-send="true"
class="moz-txt-link-freetext">qgis-user@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">
<div dir="ltr">
<div class="gmail_quote">
<div dir="ltr">
<div class="gmail_quote">
<div dir="ltr">
<div>Operating system: Linux Mint 22
Cinnamon</div>
<div>QGIS version: 3.34.4-Prizen</div>
<div>GDAL version:
3.10.0dev-1250e96221-dirt</div>
<div>MrSid DSDK version: 9.5.5.5244
</div>
<div><br>
</div>
<div>I have followed the instructions
provided by the <a
href="https://gdal.org/en/latest/drivers/raster/mrsid.html"
rel="noreferrer noreferrer"
target="_blank"
moz-do-not-send="true">GDAL website</a>
to build GDAL from source in
conjunction with the MrSid DSDK.</div>
<div><br>
</div>
<div>My cmake command was as follows:</div>
<div><br>
</div>
<div>cmake
-DCMAKE_INSTALL_PREFIX:PATH=/usr
-DGDAL_ENABLE_DRIVER_JP2MRSID=ON
-DGDAL_USE_MRSID=ON
-DMRSID_ROOT=/opt/MrSID_DSDK-9.5.5.5244-rhel9.x86-64.gcc1131/Raster_DSDK
-DMRSID_LIBRARY=/opt/MrSID_DSDK-9.5.5.5244-rhel9.x86-64.gcc1131/Raster_DSDK/lib/libltidsdk.so
-DMRSID_INCLUDE_DIR=/opt/MrSID_DSDK-9.5.5.5244-rhel9.x86-64.gcc1131/Raster_DSDK/include
..</div>
<div><br>
</div>
<div>As instructed, I've also set the
LD_LIBRARY_PATH variable to point
towards the DSDK's /lib/ path by
adding the following to me
/etc/profile file:</div>
<div><br>
</div>
<div>export
LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/opt/MrSID_DSDK-9.5.5.5244-rhel9.x86-64.gcc1131/Raster_DSDK/lib:/usr/lib</div>
<div><br>
</div>
<div>Using the command line, I'm able to
use gdalinfo to read a .sid file's
information. I even successfully used
gdalwarp on it.</div>
<div><br>
</div>
<div>However, QGIS will not accept this
file format, returning a "not a valid
or recognized data source" error.</div>
<div><br>
</div>
<div>It was my expectation that if MrSid
was enabled within GDAL through the
command line, then QGIS would be able
to read it too. Is there an additional
configuration that I'm missing?</div>
<div><br>
</div>
<div>Thank you,<br>
</div>
<div>Andrew Plowright<br>
</div>
</div>
</div>
</div>
</div>
</div>
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<pre class="moz-signature" cols="72">--
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My software is free, but my time generally not.</pre>
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