"ldd /path/to/bin/qgis | grep gdal" will show you where the qgis binary
links GDAL from
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
Safer way is to build your own QGIS using cmake
-DGDAL_CONFIG:FILEPATH=/path/to/your/bin/gdal-config
Le 23/09/2024 à 13:48, chris hermansen via QGIS-User a écrit :
Andrew and list,
On Mon, Sep 23, 2024, 00:28 Andrew Plowright via QGIS-User
<qgis-user@lists.osgeo.org> wrote:
I do indeed:
/usr/bin/gdalinfo
/bin/gdalinfo
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?
You can confirm positively by running each version using the full path
and check which one includes the MrSID driver.
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?
Maybe this link can help as it offers solutions to a similar-sounding
problem
https://gis.stackexchange.com/questions/258314/handle-two-versions-of-gdal
Thanks!
On Wed, Sep 18, 2024 at 5:04 PM Richard Greenwood
<richard.greenw...@gmail.com> wrote:
What do you get from
which -a gdalinfo
You might have two versions installed.
On Wed, Sep 18, 2024, 4:03 PM Andrew Plowright via QGIS-User
<qgis-user@lists.osgeo.org> wrote:
Operating system: Linux Mint 22 Cinnamon
QGIS version: 3.34.4-Prizen
GDAL version: 3.10.0dev-1250e96221-dirt
MrSid DSDK version: 9.5.5.5244
I have followed the instructions provided by the GDAL
website
<https://gdal.org/en/latest/drivers/raster/mrsid.html> to
build GDAL from source in conjunction with the MrSid DSDK.
My cmake command was as follows:
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
..
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:
export
LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/opt/MrSID_DSDK-9.5.5.5244-rhel9.x86-64.gcc1131/Raster_DSDK/lib:/usr/lib
Using the command line, I'm able to use gdalinfo to read a
.sid file's information. I even successfully used gdalwarp
on it.
However, QGIS will not accept this file format, returning
a "not a valid or recognized data source" error.
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?
Thank you,
Andrew Plowright
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