[Qgis-user] Unable to open MrSID file in QGIS even if gdalinfo can read it

[chris hermansen]

Andrew and list,

On Mon, Sep 23, 2024, 00:28 Andrew Plowright via QGIS-User <
qgis-user at 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.greenwood at 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 at 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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>>> QGIS-User at lists.osgeo.org
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