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meanwhile I'll be that if you the same operation with the v.overlay tool in the qgis/Processing toolbox you'll get the right results.

yep, just tested. And also the tool "polygon intersection" always in processing, returns the right results.

Hi Giovanni

I tried to show him to use v.overlay, but unfortunately QGIS package from ubuntugis is not working with GRASS package. Ubuntugis currently provides QGIS 2.8.1 and GRASS 7 and although grass 7 is enabled in processing options etc. All processing commands currently fail with 'grass could not be found'. Guess we need to wait for Radim's patched version of GRASS to land?

Regards

Tim

Tim Sutton wrote:

Hi Giovanni

I tried to show him to use v.overlay, but unfortunately QGIS package from ubuntugis is not working with GRASS package. Ubuntugis currently provides QGIS 2.8.1 and GRASS 7 and although grass 7 is enabled in processing options etc. All processing commands currently fail with 'grass could not be found'. Guess we need to wait for Radim's patched version of GRASS to land?

Regards

Tim

Hi Tim,
please check in the general Processing options (under "providers") if GRASS 7 is active. GRASS 7 is already working with Processing and is not dependent on the work being done on the QGIS/GRASS plugin.

Please let me know if it works

cheers!

Tim Sutton wrote:

Hi Giovanni

I tried to show him to use v.overlay, but unfortunately QGIS package from ubuntugis is not working with GRASS package. Ubuntugis currently provides QGIS 2.8.1 and GRASS 7 and although grass 7 is enabled in processing options etc. All processing commands currently fail with 'grass could not be found'. Guess we need to wait for Radim's patched version of GRASS to land?

Use our repositories (with the ubuntugis repository for dependencies) for QGIS 2.8.2 (see QGIS Installers Debian/Ubuntu). We don't upload to launchpad anymore - the ubuntugis packages are created as any other debian packages.

Giovanni Manghi wrote:

Tim Sutton wrote:

Hi Giovanni

I tried to show him to use v.overlay, but unfortunately QGIS package from ubuntugis is not working with GRASS package. Ubuntugis currently provides QGIS 2.8.1 and GRASS 7 and although grass 7 is enabled in processing options etc. All processing commands currently fail with 'grass could not be found'. Guess we need to wait for Radim's patched version of GRASS to land?

Regards

Tim

Hi Tim,
please check in the general Processing options (under "providers") if GRASS 7 is active. GRASS 7 is already working with Processing and is not dependent on the work being done on the QGIS/GRASS plugin.

Please let me know if it works

cheers!

Hi Giovanni,

The setting that you mean is this?

Hi Giovanni,

The setting that you mean is this?

yes, but if you are on Linux and using repositories to install packages then you will have only GRASS7 or GRASS installed (likely GRASS7 if you are on a recent release of Ubuntu): uncheck the version you have not installed.

Giovanni Manghi wrote:

Hi Giovanni,

The setting that you mean is this?

yes, but if you are on Linux and using repositories to install packages then you will have only GRASS7 or GRASS installed (likely GRASS7 if you are on a recent release of Ubuntu): uncheck the version you have not installed.

Hi,

I've tried to do this process in my windows computer.
I just could try the v.overlay process that available in GRASS Commands, because when I use the v.overlay process in GRASS 7 Commands, there is an error notification

And also, when I use the v.overlay in GRASS Commands, I could use it

But there is a problem in the result

I've tried to do this process in my windows computer.
I just could try the v.overlay process that available in GRASS Commands, because when I use the v.overlay process in GRASS 7 Commands, there is an error notification

if you used the Standalone installer this ships with GRASS 6.4 so it is normal you have to configure Processing to use it instead of GRASS 7.

And also, when I use the v.overlay in GRASS Commands, I could use it
But there is a problem in the result

you are hitting an issue that depends on the limited capacity that shapefiles have for column names length:

in your inputs shapefiles you have columns with similar/identical columns names. The operation will produce an output with column names with a prefix a_ or b_ and together with the 10 char length limit this will produce a shape with a few columns with identical names, and that is not allowed.
If you change the proper column names in your inputs then the operation goes well.

Giovanni Manghi wrote:

I've tried to do this process in my windows computer.
I just could try the v.overlay process that available in GRASS Commands, because when I use the v.overlay process in GRASS 7 Commands, there is an error notification

if you used the Standalone installer this ships with GRASS 6.4 so it is normal you have to configure Processing to use it instead of GRASS 7.

And also, when I use the v.overlay in GRASS Commands, I could use it
But there is a problem in the result

you are hitting an issue that depends on the limited capacity that shapefiles have for column names length:

in your inputs shapefiles you have columns with similar/identical columns names. The operation will produce an output with column names with a prefix a_ or b_ and together with the 10 char length limit this will produce a shape with a few columns with identical names, and that is not allowed.
If you change the proper column names in your inputs then the operation goes well.

Hi Giovanni,

Thanks for advise me about the column names.
I've tried to delete the column with similar names in both of the files, and the process could running in v.overlay that available at GRASS Commands.
When I put the SS_Agroklimat data as input layer (A), the result is fine.

But, when I put the SS_Geo data as input layer (A), the result still have an empty area.

The "ftools" category is being removed from the tracker, changing the category of this ticket to "Processing/QGIS" to not leave the category orphaned.