Re: [Qgis-user] Attribute "cat" in grass7
On 20/12/2018 11:00, Paolo Cavallini wrote:
> On 12/20/18 10:51 AM, Martin Landa wrote:
>> Hi,
>>
>> st 19. 12. 2018 v 21:43 odesílatel Benjamin Ducke
>> napsal:
>>> I think rather than worrying about all of that I
>>> would just ignore "cat" or manually delete that
>>> column from result data.
>>
>> btw, processing framework could be modified to call v.out.ogr with -s
>> flag (Skip export of GRASS category ID ('cat') attribute) [1]. Then
>> `cat` attribute wouldn't be exported.
Maybe make that optional?
Just in case that people actually want to make
use of GRASS' functionality for handling vector
categories.
Ben
>>
>> Ma
>>
>> [1] https://grass.osgeo.org/grass74/manuals/v.out.ogr.html
>
> Good idea. Could you please open a ticket, or even better DIY?
> Thanks a lot.
>
--
Dr. Benjamin Ducke
Deutsches Archäologisches Institut (DAI)
Zentrale Berlin, IT-Referat
* Projekt "Stunde Null" *
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Re: [Qgis-user] Attribute "cat" in grass7
On 12/20/18 10:51 AM, Martin Landa wrote:
> Hi,
>
> st 19. 12. 2018 v 21:43 odesílatel Benjamin Ducke
> napsal:
>> I think rather than worrying about all of that I
>> would just ignore "cat" or manually delete that
>> column from result data.
>
> btw, processing framework could be modified to call v.out.ogr with -s
> flag (Skip export of GRASS category ID ('cat') attribute) [1]. Then
> `cat` attribute wouldn't be exported.
>
> Ma
>
> [1] https://grass.osgeo.org/grass74/manuals/v.out.ogr.html
Good idea. Could you please open a ticket, or even better DIY?
Thanks a lot.
--
Paolo Cavallini - www.faunalia.eu
QGIS.ORG Chair:
http://planet.qgis.org/planet/user/28/tag/qgis%20board/
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Re: [Qgis-user] Attribute "cat" in grass7
Hi,
st 19. 12. 2018 v 21:43 odesílatel Benjamin Ducke napsal:
> I think rather than worrying about all of that I
> would just ignore "cat" or manually delete that
> column from result data.
btw, processing framework could be modified to call v.out.ogr with -s
flag (Skip export of GRASS category ID ('cat') attribute) [1]. Then
`cat` attribute wouldn't be exported.
Ma
[1] https://grass.osgeo.org/grass74/manuals/v.out.ogr.html
--
Martin Landa
http://geo.fsv.cvut.cz/gwiki/Landa
http://gismentors.cz/mentors/landa
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Re: [Qgis-user] Attribute "cat" in grass7
Hi -- On 19/12/2018 20:40, Roberto Herrero wrote: > I've seen that the grass7 algorithms add an extra attribute called > "cat". I wonder if the behaviour of the algorithms can be modified not > to show that attribute. "cat"(egory) is an integer index that serves as primary key for all GRASS vector modules. It is automatically added as soon as data is imported into GRASS. If "cat" exists in an external dataset then GRASS will attempt to rename it to "_cat". If that also fails, GRASS will abort with an error. So the GRASS algorithm provider in QGIS would have to jump through quite some hoops in order to make sure that "cat" (or "_cat") is only removed if it does not exist in the input data that is passed to GRASS. It would also have to make sure that an attribute "cat" is not the user- intended outcome of a GRASS process. In addition, some GRASS commands work explicitly on "cat" and refer to it on the manual page. I think rather than worrying about all of that I would just ignore "cat" or manually delete that column from result data. Best, Ben > > Thank you, > Roberto Herrero > > ___ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > -- Dr. Benjamin Ducke Deutsches Archäologisches Institut (DAI) Zentrale Berlin, IT-Referat * Projekt "Stunde Null" * ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Attribute "cat" in grass7
I've seen that the grass7 algorithms add an extra attribute called "cat". I wonder if the behaviour of the algorithms can be modified not to show that attribute. Thank you, Roberto Herrero ___ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
