[Ubuntu] cpp and python codes not able to access gdal library

[alassane toure]

Angelos,
Adding the following to the code  works...

sys.path.insert(0,"/usr/lib/python2.7/dist-packages")
is there any other way  to avoid adding this line?

Regards,
Alassane

On Mon, Oct 24, 2016 at 9:03 AM, Angelos Tzotsos <gcpp.kalxas at gmail.com>
wrote:

> Hi,
>
> Sorry for the delayed response.
> Is this issue still open?
>
> Best,
> Angelos
>
>
> On 10/14/2016 03:23 PM, alassane toure wrote:
>
>> Not sure how to obtain the installed version for python-gdal but here is
>> how i installed it (if that can help)
>>
>> sudo apt-add-repository ppa:ubuntugis/ubuntugis-unstable
>> sudo apt-get update
>> sudo apt-get install python-gdal
>>
>> Thanks for your suggestions
>>
>> Alassane
>>
>> On Fri, Oct 14, 2016 at 8:16 AM, alassane toure <atourej at gmail.com>
>> wrote:
>>
>> GDAL is 1.11.2 as I had other issues with 2.1.0. and python-gdal has to be
>>> the most recent one.  I will let you know as soon i get on the server.
>>>
>>> Thanks.
>>>
>>> Alassane
>>>
>>> On Fri, Oct 14, 2016 at 4:28 AM, Angelos Tzotsos <gcpp.kalxas at gmail.com>
>>> wrote:
>>>
>>> Hi,
>>>>
>>>> Can you please list the versions of libgdal and python-gdal that are
>>>> installed on your machine?
>>>>
>>>> Best,
>>>> Angelos
>>>>
>>>>
>>>> On 10/14/2016 06:41 AM, alassane toure wrote:
>>>>
>>>> Even,
>>>>
>>>> I tried the followings but the response did not change...
>>>>
>>>> sudo apt-add-repository ppa:ubuntugis/ubuntugis-unstable
>>>> sudo apt-get update
>>>> sudo apt-get install python-gdal
>>>>
>>>> Any suggestions?
>>>> Thanks,
>>>> Alassane
>>>>
>>>> On Thu, Sep 8, 2016 at 3:51 AM, Even Rouault <
>>>> even.rouault at spatialys.com> <even.rouault at spatialys.com>
>>>>
>>>> wrote:
>>>>
>>>>
>>>> Alassane,
>>>>
>>>>
>>>> I developed a gdal code on my local machine and it worked.  Having gdal
>>>>
>>>> and
>>>>
>>>> g++ working on the server my compilation of the same code resulted in
>>>> the
>>>> following response...
>>>>
>>>>   gcc -o applymask applymask.cpp -I /usr/include/gdal -lgdal -lm
>>>> applymask.cpp: In function âint main(int, char**)â:
>>>> applymask.cpp:63:95: warning: ignoring return value of âCPLErr
>>>> GDALRasterBand::RasterIO(GDALRWFlag, int, int, int, int, void*, int,
>>>>
>>>> int,
>>>>
>>>> GDALDataType, GSpacing, GSpacing, GDALRasterIOExtraArg*)â, declared with
>>>> attribute warn_unused_result [-Wunused-result]
>>>>           Band->RasterIO( GF_Read, 0, iLine,nXSize, 1, inScanline,
>>>> nXSize,
>>>> 1, GDT_Float32,0, 0 );
>>>>
>>>>                     ^
>>>> applymask.cpp:64:101: warning: ignoring return value of âCPLErr
>>>> GDALRasterBand::RasterIO(GDALRWFlag, int, int, int, int, void*, int,
>>>>
>>>> int,
>>>>
>>>> GDALDataType, GSpacing, GSpacing, GDALRasterIOExtraArg*)â, declared with
>>>> attribute warn_unused_result [-Wunused-result]
>>>>           maskBand->RasterIO( GF_Read, 0, iLine,nXSize, 1, maskScanline,
>>>> nXSize, 1, GDT_Float32,0, 0 );
>>>>
>>>>                           ^
>>>> applymask.cpp:75:94: warning: ignoring return value of âCPLErr
>>>> GDALRasterBand::RasterIO(GDALRWFlag, int, int, int, int, void*, int,
>>>>
>>>> int,
>>>>
>>>> GDALDataType, GSpacing, GSpacing, GDALRasterIOExtraArg*)â, declared with
>>>> attribute warn_unused_result [-Wunused-result]
>>>>     outBand->RasterIO( GF_Write, 0, iLine,nXSize, 1, outScanline,
>>>> nXSize,
>>>>
>>>> 1,
>>>>
>>>> GDT_Float32,0, 0 );
>>>>
>>>>
>>>> The warning says it all. You use GDALRasterBand::RasterIO() but do not
>>>> check
>>>> the return value. You probably don't get it on your local machine since
>>>> it
>>>> might use an older version of GDAL where this method wasn't tagged with
>>>> the
>>>> warn_unused_result attribute.
>>>>
>>>> The right fix is to check the return value and do something appropriate.
>>>> Or you
>>>> can silence the warning by enclosing the calls in
>>>> CPL_IGNORE_RET_VAL(...)
>>>>
>>>>
>>>> Also, my python code does not import all refered libraries including
>>>>
>>>> gdal.
>>>>
>>>>    File "/usr/local/bin/CD4DEM.py", line 12, in <module>
>>>>      import gdalImportError: No module named gdal
>>>>
>>>> Did you install the python-gdal package ?
>>>>
>>>> Even
>>>>
>>>> --
>>>> Spatialys - Geospatial professional serviceshttp://www.spatialys.com
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> UbuntuGIS mailing listUbuntu at lists.osgeo.orghttp://
>>>> lists.osgeo.org/mailman/listinfo/ubuntuhttp://trac.
>>>> osgeo.org/ubuntugis/wiki
>>>>
>>>>
>>>>
>>>> --
>>>> Angelos Tzotsos, PhD
>>>> OSGeo Charter Memberhttp://users.ntua.gr/tzotsos
>>>>
>>>>
>>>>
>
> --
> Angelos Tzotsos, PhD
> OSGeo Charter Member
> http://users.ntua.gr/tzotsos
>
>
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