[QGIS-Developer] Influencing order of Loaded Processing FeatureSinks
Hi Devs, I recently used the CheckValidity algorithm to check some strange shapefile: https://github.com/qgis/QGIS/blob/master/python/plugins/processing/algs/qgis/CheckValidity.py It generates (if you let them load) three layers: - Valid output (features) - Invalid output - Error output (points) But... in that order so after every validation you have to pull (at least) de Error output on top to see the invalid points. So I thought to try to change the order in the python code, but (to me) it looked I could not influence that. Am I right? I tried both changing the order of the parameter and featuresink creation, I even tried to rename the layers (as in prepending abc or 123 to it). Or am I missing something? Another feature I would like to see: show the actual count (of at least the invalid features and the error points), but same thing: processing is indeed loosely/not coupled to QGIS-gui? But because these core-algorithms are part of gui/menu's, I'm hoping we can maybe make this better? Any hint appreciated. Regards, Richard Duivenvoorde ___ QGIS-Developer mailing list QGIS-Developer@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [QGIS-Developer] Access QgsVectorLayer from child algorithm
Yes, that is the method I am looking for. Thank you, Etienne.
I am still curious why the output is different depending on the
isChildAlgorithm parameter??
Simon
Am 24.11.2021 um 12:50 schrieb Etienne Trimaille:
This might help you ?
QgsProcessingUtils::mapLayerFromString()
https://qgis.org/api/classQgsProcessingUtils.html#aa1c2360e52d2ed8100faf02a35125b17
Le mer. 24 nov. 2021 à 11:19, Simon Gröchenig
a écrit :
Hi developers,
I am developing a Python processing algorithm with some child
algorithms. I am struggling to find a way to access a child
algorithm's output vector layer. I want to use
isChildAlgorithm=True in order to correctly set the feedback progress.
* If I use processing.run(...) with setting the parameter
isChildAlgorithm to False (= default), the vector layer (via sink)
is returned as a QgsVectorLayer.
* If I set isChildAlgorithm to True, only the dest_id is returned
as a string. I did not find a solution on how I retrieve the
corresponding QgsVectorLayer.
* Is it intentional that the vector layer is returned as
QgsVectorLayer or str (dest_id), depending on the isChildAlgorithm
parameter?
* How can I access output QgsVectorLayer from a child algorithm?
This is a minimum example where you can modify the
is_child_algorithm parameter:
parameters = {
'INPUT': QgsVectorLayer('Point?crs=epsg:31258', 'locations',
"memory"),
'DISTANCE': 10,
'OUTPUT': 'TEMPORARY_OUTPUT'
}
result = processing.run("native:buffer", parameters,
is_child_algorithm=False )
vector_layer = result['OUTPUT']
print(str(type(vector_layer)))
Best regards
Simon
--
Simon Gröchenig MSc
MTA - Mobility & Transport Analytics
Salzburg Research Forschungsgesellschaft mbH
Jakob-Haringer-Straße 5/3 | 5020 Salzburg, Austria
T: +43.662.2288-314
simon.groeche...@salzburgresearch.at
http://www.salzburgresearch.at
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--
Simon Gröchenig MSc
MTA - Mobility & Transport Analytics
Salzburg Research Forschungsgesellschaft mbH
Jakob-Haringer-Straße 5/3 | 5020 Salzburg, Austria
T: +43.662.2288-314
simon.groeche...@salzburgresearch.at
http://www.salzburgresearch.at
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Re: [QGIS-Developer] Minimal docker image for qgis_process/processing
FYI, the image at https://hub.docker.com/r/3liz/qgis-platform is perfectly suited for using processing with python (we use it as base image for our wps/processing server) Le 24/11/2021 à 18:21, Denis Rouzaud a écrit : I didn't pay attention but replied privately to David. After discussing, it appears that qgis_process is only available under the qgis package. It would make sense to make it available under it own package, no? Le mer. 24 nov. 2021 à 09:58, David Marteau a écrit : Hi Nyall I don't know if this is what you are seeking for but you will find at https://hub.docker.com/r/3liz/qgis-platform a simple image that embed the official version (release/ltr) of Qgis library (no desktop support). That image do nothing except having a Qgis install. We use it as a base image for all other docker images that require Qgis libraries. Sincerely David Le 24/11/2021 à 07:31, Nyall Dawson a écrit : > Hi lists, > > Is anyone aware of any minimal QGIS dockers which are designed just > for using the processing tools (either via Python or qgis_process)? > > (Ideally I'm hoping to find one which has no > GUI/server/application/etc components, but does have all the desirable > libraries for a full-featured processing experience!) > > Nyall > ___ > QGIS-Developer mailing list > QGIS-Developer@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer ___ QGIS-Developer mailing list QGIS-Developer@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer ___ QGIS-Developer mailing list QGIS-Developer@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [QGIS-Developer] Minimal docker image for qgis_process/processing
I didn't pay attention but replied privately to David. After discussing, it appears that qgis_process is only available under the qgis package. It would make sense to make it available under it own package, no? Le mer. 24 nov. 2021 à 09:58, David Marteau a écrit : > Hi Nyall > > I don't know if this is what you are seeking for but you will find at > https://hub.docker.com/r/3liz/qgis-platform a simple > image that embed the official version (release/ltr) of Qgis library (no > desktop support). > > That image do nothing except having a Qgis install. We use it as a base > image for all other docker images that require Qgis libraries. > > Sincerely > > David > > Le 24/11/2021 à 07:31, Nyall Dawson a écrit : > > Hi lists, > > > > Is anyone aware of any minimal QGIS dockers which are designed just > > for using the processing tools (either via Python or qgis_process)? > > > > (Ideally I'm hoping to find one which has no > > GUI/server/application/etc components, but does have all the desirable > > libraries for a full-featured processing experience!) > > > > Nyall > > ___ > > QGIS-Developer mailing list > > QGIS-Developer@lists.osgeo.org > > List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer > > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer > ___ > QGIS-Developer mailing list > QGIS-Developer@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer > ___ QGIS-Developer mailing list QGIS-Developer@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [QGIS-Developer] Access QgsVectorLayer from child algorithm
This might help you ?
QgsProcessingUtils::mapLayerFromString()
https://qgis.org/api/classQgsProcessingUtils.html#aa1c2360e52d2ed8100faf02a35125b17
Le mer. 24 nov. 2021 à 11:19, Simon Gröchenig <
simon.groeche...@salzburgresearch.at> a écrit :
> Hi developers,
>
> I am developing a Python processing algorithm with some child algorithms.
> I am struggling to find a way to access a child algorithm's output vector
> layer. I want to use isChildAlgorithm=True in order to correctly set the
> feedback progress.
>
> * If I use processing.run(...) with setting the parameter isChildAlgorithm
> to False (= default), the vector layer (via sink) is returned as a
> QgsVectorLayer.
> * If I set isChildAlgorithm to True, only the dest_id is returned as a
> string. I did not find a solution on how I retrieve the corresponding
> QgsVectorLayer.
> * Is it intentional that the vector layer is returned as QgsVectorLayer or
> str (dest_id), depending on the isChildAlgorithm parameter?
> * How can I access output QgsVectorLayer from a child algorithm?
>
> This is a minimum example where you can modify the is_child_algorithm
> parameter:
>
> parameters = {
> 'INPUT': QgsVectorLayer('Point?crs=epsg:31258', 'locations', "memory"),
> 'DISTANCE': 10,
> 'OUTPUT': 'TEMPORARY_OUTPUT'
> }
> result = processing.run("native:buffer", parameters,
> is_child_algorithm=False )
> vector_layer = result['OUTPUT']
> print(str(type(vector_layer)))
>
> Best regards
> Simon
>
> --
> Simon Gröchenig MSc
> MTA - Mobility & Transport Analytics
>
> Salzburg Research Forschungsgesellschaft mbH
> Jakob-Haringer-Straße 5/3 | 5020 Salzburg, Austria
> T:
> +43.662.2288-314simon.groechenig@salzburgresearch.athttp://www.salzburgresearch.at
>
> ___
> QGIS-Developer mailing list
> QGIS-Developer@lists.osgeo.org
> List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer
> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
>
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[QGIS-Developer] Access QgsVectorLayer from child algorithm
Hi developers,
I am developing a Python processing algorithm with some child
algorithms. I am struggling to find a way to access a child algorithm's
output vector layer. I want to use isChildAlgorithm=True in order to
correctly set the feedback progress.
* If I use processing.run(...) with setting the parameter
isChildAlgorithm to False (= default), the vector layer (via sink) is
returned as a QgsVectorLayer.
* If I set isChildAlgorithm to True, only the dest_id is returned as a
string. I did not find a solution on how I retrieve the corresponding
QgsVectorLayer.
* Is it intentional that the vector layer is returned as QgsVectorLayer
or str (dest_id), depending on the isChildAlgorithm parameter?
* How can I access output QgsVectorLayer from a child algorithm?
This is a minimum example where you can modify the is_child_algorithm
parameter:
parameters = {
'INPUT': QgsVectorLayer('Point?crs=epsg:31258', 'locations', "memory"),
'DISTANCE': 10,
'OUTPUT': 'TEMPORARY_OUTPUT'
}
result = processing.run("native:buffer", parameters,
is_child_algorithm=False )
vector_layer = result['OUTPUT']
print(str(type(vector_layer)))
Best regards
Simon
--
Simon Gröchenig MSc
MTA - Mobility & Transport Analytics
Salzburg Research Forschungsgesellschaft mbH
Jakob-Haringer-Straße 5/3 | 5020 Salzburg, Austria
T: +43.662.2288-314
simon.groeche...@salzburgresearch.at
http://www.salzburgresearch.at
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List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer
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Re: [QGIS-Developer] Minimal docker image for qgis_process/processing
Hi Nyall, I prepared a qgis image based on alpine linux a couple of months back but never released it to public. It's super slim and builds QGIS from source during docker build. If there is interest, I can revive that. Cheers Matthias On Wed, Nov 24, 2021 at 7:31 AM Nyall Dawson wrote: > Hi lists, > > Is anyone aware of any minimal QGIS dockers which are designed just > for using the processing tools (either via Python or qgis_process)? > > (Ideally I'm hoping to find one which has no > GUI/server/application/etc components, but does have all the desirable > libraries for a full-featured processing experience!) > > Nyall > ___ > QGIS-Developer mailing list > QGIS-Developer@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer > ___ QGIS-Developer mailing list QGIS-Developer@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [QGIS-Developer] Minimal docker image for qgis_process/processing
Hi Nyall I don't know if this is what you are seeking for but you will find at https://hub.docker.com/r/3liz/qgis-platform a simple image that embed the official version (release/ltr) of Qgis library (no desktop support). That image do nothing except having a Qgis install. We use it as a base image for all other docker images that require Qgis libraries. Sincerely David Le 24/11/2021 à 07:31, Nyall Dawson a écrit : Hi lists, Is anyone aware of any minimal QGIS dockers which are designed just for using the processing tools (either via Python or qgis_process)? (Ideally I'm hoping to find one which has no GUI/server/application/etc components, but does have all the desirable libraries for a full-featured processing experience!) Nyall ___ QGIS-Developer mailing list QGIS-Developer@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer ___ QGIS-Developer mailing list QGIS-Developer@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
