[Qgis-user] Qgis-user Digest, Vol 109, Issue 55

Thu Mar 26 13:27:55 PDT 2015

Hi Paolo,Thanks. Yes I am using QGIS 2.0.1(DUFOUR). You advised me to upgrade it. But I did many projects with this version. If I would upgrade some projects may not work.Any helpAzizul 

     On Thursday, 26 March 2015, 14:19, "qgis-user-request at lists.osgeo.org" <qgis-user-request at lists.osgeo.org> wrote:

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Today's Topics:

  1. Re: Qgis-user Digest, Vol 109, Issue 54 (azizul haque)

----------------------------------------------------------------------

Message: 1
Date: Thu, 26 Mar 2015 19:37:19 +0000 (UTC)
From: azizul haque <haque.azizul320 at yahoo.com>
To: "qgis-user at lists.osgeo.org" <qgis-user at lists.osgeo.org>
Subject: Re: [Qgis-user] Qgis-user Digest, Vol 109, Issue 54
Message-ID:
    <2112640837.2351024.1427398639549.JavaMail.yahoo at mail.yahoo.com>
Content-Type: text/plain; charset="utf-8"

Hi Paolo,Thanks. The?error messages are followingCouldn't load plugin BufferByPercentage due an error when calling its classFactory() method

Traceback (most recent call last):
? File "/Applications/QGIS.app/Contents/MacOS/../Resources/python/qgis/utils.py", line 204, in startPlugin
? ? plugins[packageName] = package.classFactory(iface)
? File "/Users/ahaque/.qgis2/python/plugins/BufferByPercentage/__init__.py", line 52, in classFactory
? ? from bufferbypercentage import BufferByPercentagePlugin
? File "/Applications/QGIS.app/Contents/MacOS/../Resources/python/qgis/utils.py", line 453, in _import
? ? mod = _builtin_import(name, globals, locals, fromlist, level)
? File "/Users/ahaque/.qgis2/python/plugins/BufferByPercentage/bufferbypercentage.py", line 36, in 
? ? from processing.core.Processing import Processing
? File "/Applications/QGIS.app/Contents/MacOS/../Resources/python/qgis/utils.py", line 453, in _import
? ? mod = _builtin_import(name, globals, locals, fromlist, level)
? File "/Users/ahaque/.qgis2/python/plugins/processing/__init__.py", line 29, in 
? ? from processing.tools.general import *
? File "/Applications/QGIS.app/Contents/MacOS/../Resources/python/qgis/utils.py", line 453, in _import
? ? mod = _builtin_import(name, globals, locals, fromlist, level)
? File "/Users/ahaque/.qgis2/python/plugins/processing/tools/general.py", line 28, in 
? ? from processing.core.Processing import Processing
? File "/Applications/QGIS.app/Contents/MacOS/../Resources/python/qgis/utils.py", line 453, in _import
? ? mod = _builtin_import(name, globals, locals, fromlist, level)
? File "/Users/ahaque/.qgis2/python/plugins/processing/core/Processing.py", line 48, in 
? ? from processing.algs.qgis.QGISAlgorithmProvider import QGISAlgorithmProvider
? File "/Applications/QGIS.app/Contents/MacOS/../Resources/python/qgis/utils.py", line 453, in _import
? ? mod = _builtin_import(name, globals, locals, fromlist, level)
? File "/Users/ahaque/.qgis2/python/plugins/processing/algs/qgis/QGISAlgorithmProvider.py", line 128, in 
? ? from processing.algs.qgis.FieldsMapper import FieldsMapper
? File "/Applications/QGIS.app/Contents/MacOS/../Resources/python/qgis/utils.py", line 453, in _import
? ? mod = _builtin_import(name, globals, locals, fromlist, level)
? File "/Users/ahaque/.qgis2/python/plugins/processing/algs/qgis/FieldsMapper.py", line 37, in 
? ? from .ui.FieldsMapperDialogs import (FieldsMapperParametersDialog,
? File "/Applications/QGIS.app/Contents/MacOS/../Resources/python/qgis/utils.py", line 453, in _import
? ? mod = _builtin_import(name, globals, locals, fromlist, level)
? File "/Users/ahaque/.qgis2/python/plugins/processing/algs/qgis/ui/FieldsMapperDialogs.py", line 38, in 
? ? from .FieldsMappingPanel import FieldsMappingPanel
? File "/Applications/QGIS.app/Contents/MacOS/../Resources/python/qgis/utils.py", line 453, in _import
? ? mod = _builtin_import(name, globals, locals, fromlist, level)
? File "/Users/ahaque/.qgis2/python/plugins/processing/algs/qgis/ui/FieldsMappingPanel.py", line 34, in 
? ? from qgis.gui import QgsFieldExpressionWidget
ImportError: cannot import name QgsFieldExpressionWidget

Python version:
2.7.5 (default, Mar? 9 2014, 22:15:05) 
[GCC 4.2.1 Compatible Apple LLVM 5.0 (clang-500.0.68)]

QGIS version:
2.0.1-Dufour Dufour, f738351

Python path: ['/Applications/QGIS.app/Contents/MacOS/../Resources/python', '/Users/ahaque/.qgis2/python', '/Users/ahaque/.qgis2/python/plugins', '/Applications/QGIS.app/Contents/MacOS/../Resources/python/plugins', '/Library/Frameworks/SQLite3.framework/Versions/B/Python/2.7', '/Library/Frameworks/GEOS.framework/Versions/3/Python/2.7', '/Library/Python/2.7/site-packages/numpy-override', '/Library/Python/2.7/site-packages/matplotlib-override', '/Library/Frameworks/GDAL.framework/Versions/1.11/Python/2.7/site-packages', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python27.zip', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages', '/System/Library/Frameworks/Python.framework/Versions
 /2.7/Extras/lib/python', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload', '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC', '/Library/Python/2.7/site-packages']Couldn't load plugin 'processing' from ['/Applications/QGIS.app/Contents/MacOS/../Resources/python', '/Users/ahaque/.qgis2/python', '/Users/ahaque/.qgis2/python/plugins', '/Applications/QGIS.app/Contents/MacOS/../Resources/python/plugins', '/Library/Frameworks/SQLite3.framework/Versions/B/Python/2.7', '/Library/Frameworks/GEOS.framework/Versions/3/Python/2.7', '/Library/Python/2.7/site-packages/numpy-override', '/Library/Python/2.7/site-packages/matplotlib-override', '/Library/Frameworks/GDAL.framework/Versions/1.11/Python/2.7/site-packages', '/System/Library/Frameworks/Python.framework/Versions
 /2.7/lib/python27.zip', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages', '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload', '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC', '/Library/Python/2.7/site-packages']

Traceback (most recent call last):
? File "/Applications/QGIS.app/Contents/MacOS/../Resources/python/qgis/utils.py", line 182, in loadPlugin
? ? __import__(packageName)
? File "/Applications/QGIS.app/Contents/MacOS/../Resources/python/qgis/utils.py", line 453, in _import
? ? mod = _builtin_import(name, globals, locals, fromlist, level)
? File "/Users/ahaque/.qgis2/python/plugins/processing/__init__.py", line 29, in 
? ? from processing.tools.general import *
? File "/Applications/QGIS.app/Contents/MacOS/../Resources/python/qgis/utils.py", line 453, in _import
? ? mod = _builtin_import(name, globals, locals, fromlist, level)
? File "/Users/ahaque/.qgis2/python/plugins/processing/tools/general.py", line 28, in 
? ? from processing.core.Processing import Processing
? File "/Applications/QGIS.app/Contents/MacOS/../Resources/python/qgis/utils.py", line 453, in _import
? ? mod = _builtin_import(name, globals, locals, fromlist, level)
? File "/Users/ahaque/.qgis2/python/plugins/processing/core/Processing.py", line 48, in 
? ? from processing.algs.qgis.QGISAlgorithmProvider import QGISAlgorithmProvider
? File "/Applications/QGIS.app/Contents/MacOS/../Resources/python/qgis/utils.py", line 453, in _import
? ? mod = _builtin_import(name, globals, locals, fromlist, level)
? File "/Users/ahaque/.qgis2/python/plugins/processing/algs/qgis/QGISAlgorithmProvider.py", line 128, in 
? ? from processing.algs.qgis.FieldsMapper import FieldsMapper
? File "/Applications/QGIS.app/Contents/MacOS/../Resources/python/qgis/utils.py", line 453, in _import
? ? mod = _builtin_import(name, globals, locals, fromlist, level)
? File "/Users/ahaque/.qgis2/python/plugins/processing/algs/qgis/FieldsMapper.py", line 37, in 
? ? from .ui.FieldsMapperDialogs import (FieldsMapperParametersDialog,
? File "/Applications/QGIS.app/Contents/MacOS/../Resources/python/qgis/utils.py", line 453, in _import
? ? mod = _builtin_import(name, globals, locals, fromlist, level)
? File "/Users/ahaque/.qgis2/python/plugins/processing/algs/qgis/ui/FieldsMapperDialogs.py", line 38, in 
? ? from .FieldsMappingPanel import FieldsMappingPanel
? File "/Applications/QGIS.app/Contents/MacOS/../Resources/python/qgis/utils.py", line 453, in _import
? ? mod = _builtin_import(name, globals, locals, fromlist, level)
? File "/Users/ahaque/.qgis2/python/plugins/processing/algs/qgis/ui/FieldsMappingPanel.py", line 34, in 
? ? from qgis.gui import QgsFieldExpressionWidget
ImportError: cannot import name QgsFieldExpressionWidget

Python version:
2.7.5 (default, Mar? 9 2014, 22:15:05) 
[GCC 4.2.1 Compatible Apple LLVM 5.0 (clang-500.0.68)]

QGIS version:
2.0.1-Dufour Dufour, f738351

Python path: ['/Applications/QGIS.app/Contents/MacOS/../Resources/python', '/Users/ahaque/.qgis2/python', '/Users/ahaque/.qgis2/python/plugins', '/Applications/QGIS.app/Contents/MacOS/../Resources/python/plugins', '/Library/Frameworks/SQLite3.framework/Versions/B/Python/2.7', '/Library/Frameworks/GEOS.framework/Versions/3/Python/2.7', '/Library/Python/2.7/site-packages/numpy-override', '/Library/Python/2.7/site-packages/matplotlib-override', '/Library/Frameworks/GDAL.framework/Versions/1.11/Python/2.7/site-packages', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python27.zip', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages', '/System/Library/Frameworks/Python.framework/Versions
 /2.7/Extras/lib/python', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-old', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload', '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC', '/Library/Python/2.7/site-packages'] 

    On Thursday, 26 March 2015, 12:39, "qgis-user-request at lists.osgeo.org" <qgis-user-request at lists.osgeo.org> wrote:

 Send Qgis-user mailing list submissions to
??? qgis-user at lists.osgeo.org

To subscribe or unsubscribe via the World Wide Web, visit
??? http://lists.osgeo.org/mailman/listinfo/qgis-user
or, via email, send a message with subject or body 'help' to
??? qgis-user-request at lists.osgeo.org

You can reach the person managing the list at
??? qgis-user-owner at lists.osgeo.org

When replying, please edit your Subject line so it is more specific
than "Re: Contents of Qgis-user digest..."

Today's Topics:

? 1. Re: Plugins are broken (Paolo Cavallini)
? 2. Re: Plugins are broken (Etienne Trimaille)
? 3. Re: rule based classification - attribute based on??? other
? ? ? layer (Matteo Ghetta)
? 4. Re: rule based classification - attribute based on??? other
? ? ? layer (Matteo Ghetta)
? 5. measure processing time (research difference Qgis and??? ArcGIS)
? ? ? (Pieter Stevens)
? 6. Re: BBox Filter for WFS (G. Allegri)
? 7. Re: rule based classification - attribute based on??? other
? ? ? layer (Matteo Ghetta)
? 8. Re: rule based classification - attribute based on other
? ? ? layer (Andreas Neumann)
? 9. Re: BBox Filter for WFS (G. Allegri)

----------------------------------------------------------------------

Message: 1
Date: Thu, 26 Mar 2015 14:29:06 +0100
From: Paolo Cavallini <cavallini at faunalia.it>
To: qgis-user at lists.osgeo.org
Subject: Re: [Qgis-user] Plugins are broken
Message-ID: <551409A2.7050107 at faunalia.it>
Content-Type: text/plain; charset=windows-1252

Il 26/03/2015 14:23, azizul haque ha scritto:
> Dear QGIS Users,
> As I sent a message to you all that Processing, QuickOSM and Buffer by
> percentage plugin are broken. I could not recovery it yet.

Hi Azizul,
what is the error message?
All the best.

-- 
Paolo Cavallini - www.faunalia.eu
QGIS & PostGIS courses: http://www.faunalia.eu/training.html

------------------------------

Message: 2
Date: Thu, 26 Mar 2015 15:32:50 +0200
From: Etienne Trimaille <etienne.trimaille at gmail.com>
To: Paolo Cavallini <cavallini at faunalia.it>
Cc: qgis-user <qgis-user at lists.osgeo.org>
Subject: Re: [Qgis-user] Plugins are broken
Message-ID:
??? <CAMtDFLLep_fYLSa4cOedRveDpV8vT53YT4v+6ACpcnESNCP=zw at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Azizul, in another topic, you said that you are using QGIS 2.0.1.
First, you should upgrade to 2.8.1.

2015-03-26 15:29 GMT+02:00 Paolo Cavallini <cavallini at faunalia.it>:

> Il 26/03/2015 14:23, azizul haque ha scritto:
> > Dear QGIS Users,
> > As I sent a message to you all that Processing, QuickOSM and Buffer by
> > percentage plugin are broken. I could not recovery it yet.
>
> Hi Azizul,
> what is the error message?
> All the best.
>
> --
> Paolo Cavallini - www.faunalia.eu
> QGIS & PostGIS courses: http://www.faunalia.eu/training.html
> _______________________________________________
> Qgis-user mailing list
> Qgis-user at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/qgis-user
>
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Message: 3
Date: Thu, 26 Mar 2015 15:53:05 +0100
From: Matteo Ghetta <matteo.ghetta at gmail.com>
To: tech at wildintellect.com
Cc: QGIS Mailing List <qgis-user at lists.osgeo.org>
Subject: Re: [Qgis-user] rule based classification - attribute based
??? on??? other layer
Message-ID:
??? <CAMMN2u0TFMaPDBObMo9iYf+H8Cd-1whzE3xnHhkx7zvMdXZXmA at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

>
> Sounds like you are trying Red if valueA > max(layer B value)?
>

exactly... :)
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Message: 4
Date: Thu, 26 Mar 2015 16:02:02 +0100
From: Matteo Ghetta <matteo.ghetta at gmail.com>
To: Junior Delaz <delazj at gmail.com>
Cc: QGIS Mailing List <qgis-user at lists.osgeo.org>
Subject: Re: [Qgis-user] rule based classification - attribute based
??? on??? other layer
Message-ID:
??? <CAMMN2u2Q8CChR217Vs6+03uwSH7aoQ6qnT1+Jc_uw5H20vJMTg at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Hi,
I cannot install the plugin.. I have a missing library (qtsql)...
anyway thanks for clarifying..

Matteo

2015-03-25 19:11 GMT+01:00 Junior Delaz <delazj at gmail.com>:

> Hello,
> You may give a look to *getFeature* function (combining or not with
> function like *attribute* or spatial ones). There is also *RefFunctions*
> plugin that may help to use values/fields of another layer.
> But unfortunately, there is no list of such layers nor their fields in the
> dialog. You need to write them yourself and their values.
>
> 2015-03-25 18:14 GMT+01:00 Matteo Ghetta <matteo.ghetta at gmail.com>:
>
>> Hi all,
>> very simple question.
>> In the rule-based classification (vector) is it possible to use values of
>> another layer loaded in QGIS?
>>
>> For example. Point vector and I want to display as red each feature that
>> has a value greater than a value stored in another point layer (or in a
>> table).
>> In the expression builder there are the fields of the active layer.
>>
>> Is it possible to call the fields of other layers?
>>
>> Thanks
>>
>> Cheers
>>
>> Matteo
>>
>>
>>
>> _______________________________________________
>> Qgis-user mailing list
>> Qgis-user at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/qgis-user
>>
>
>
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------------------------------

Message: 5
Date: Thu, 26 Mar 2015 15:58:04 +0100
From: "Pieter Stevens" <Pieter.Stevens at Ugent.be>
To: <qgis-user at lists.osgeo.org>
Subject: [Qgis-user] measure processing time (research difference Qgis
??? and??? ArcGIS)
Message-ID: <000c01d067d5$43706a00$ca513e00$@Ugent.be>
Content-Type: text/plain; charset="us-ascii"

Dear sir,

Dear madam,

As a student of the university Ghent I'm researching the differences and
similarities between ArcGIS and QuantumGIS. 

A part of the research is about the time needed to process simple tools (for
exemple: buffer, clip, union, .). ArcGIS has the possibility to watch the
log where you can see how long the program took to process.

I was wondering whether QGIS has the same function. 

I was also wondering whether anyone of the QGIS community already did
comparable research, or has read anything that could help me. 

Sincerely,

Pieter Stevens

Linking program to master of science in land surveying technology? 

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------------------------------

Message: 6
Date: Thu, 26 Mar 2015 16:07:13 +0100
From: "G. Allegri" <giohappy at gmail.com>
To: Peter Borissow <peter.borissow at yahoo.com>
Cc: "qgis-user at lists.osgeo.org" <qgis-user at lists.osgeo.org>
Subject: Re: [Qgis-user] BBox Filter for WFS
Message-ID:
??? <CAB4g1=yOYES5GVoQRMYZ5aY8HNHB5Tj8uxGNtvnxtU47h8xyGg at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

It's an intereseting question Peter.
I've verified that the wfs provider still requests the whole data the first
time, then it stores eveything (and create a spatial index for subsequent
calls).
I suppose that sponsoring this feature could be the right way to have it,
but I'm curious to know what the latest answer from Marco was referring to
(I mean within the svn code he indicates) [1]

Giovanni

[1] http://hub.qgis.org/issues/1421#note-4

2015-03-25 12:25 GMT+01:00 Peter Borissow <peter.borissow at yahoo.com>:

> Sorry for being impatient but I was wondering if anyone can shed some
> light on this issue.
>
> I have a WFS that's serving out over a billion features (several million
> records per layer). When I add a layer from the WFS into QGIS, it calls
> DescribeFeature and then GetFeature without a BBOX filter. QGIS then waits
> for ALL of the data to come back (which can take a while).
>
> In the past, there was an option only fetch features that intersect the
> current map extent. Without this option, it is extremely difficult to do
> anything with the WFS using QGIS.
>
> IMHO, this is a pretty significant bug but hopefully one that should be
> really easy to fix. Afterall, the code was there at some point...
>
>
> Related (unanswered) questions on stack exchange:
>
>
> http://gis.stackexchange.com/questions/53387/quantumgis-1-8-how-to-define-bounding-box-within-add-wfs-layer-dialog
>
> http://gis.stackexchange.com/questions/59656/is-there-free-desktop-wfs-client-with-bbox-support
>
> Thanks,
> Peter
>
>
>
>? ------------------------------
>? *From:* Peter Borissow <peter.borissow at yahoo.com>
> *To:* "qgis-user at lists.osgeo.org" <qgis-user at lists.osgeo.org>
> *Sent:* Monday, March 23, 2015 2:03 PM
> *Subject:* BBox Filter for WFS
>
> Hello-
>? ? I noticed that the WFS client in QGIS 2.8 and 2.6 do not seem to pass
> a bbox filter when requesting features.
>
> It seems that in the past, QGIS had an option to only fetch features that
> intersect the current map extent:
>
> http://hub.qgis.org/issues/1421
>
> Based on this thread, it looks like this feature was disabled in 1.8:
>
> http://osdir.com/ml/qgis-user-gis/2011-10/msg00308.html
>
> Is this feature still missing or is there a way to enable this feature in
> the latest release?
>
>
> Thanks,
> Peter
>
>
>
>
>
> _______________________________________________
> Qgis-user mailing list
> Qgis-user at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/qgis-user
>

-- 
Giovanni Allegri
http://about.me/giovanniallegri
Gis3W - http://gis3w.it
Ikare - http://ikare.it
Twitter: https://twitter.com/_giohappy_
blog: http://blog.spaziogis.it
GEO+ geomatica in Italia http://bit.ly/GEOplus
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Message: 7
Date: Thu, 26 Mar 2015 16:10:33 +0100
From: Matteo Ghetta <matteo.ghetta at gmail.com>
To: Junior Delaz <delazj at gmail.com>
Cc: QGIS Mailing List <qgis-user at lists.osgeo.org>
Subject: Re: [Qgis-user] rule based classification - attribute based
??? on??? other layer
Message-ID:
??? <CAMMN2u1WqgZeCUoo5ToPd3Q8SyZH6+EZbvsAnWYsz-P0+k1_Bg at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

sorry... plugin installed...
I see all the functions in the field calculator but do you have a small and
quick example of what I am looking for?
I don't understand the function to use..

Thanks!

Matteo

2015-03-25 19:11 GMT+01:00 Junior Delaz <delazj at gmail.com>:

> Hello,
> You may give a look to *getFeature* function (combining or not with
> function like *attribute* or spatial ones). There is also *RefFunctions*
> plugin that may help to use values/fields of another layer.
> But unfortunately, there is no list of such layers nor their fields in the
> dialog. You need to write them yourself and their values.
>
> 2015-03-25 18:14 GMT+01:00 Matteo Ghetta <matteo.ghetta at gmail.com>:
>
>> Hi all,
>> very simple question.
>> In the rule-based classification (vector) is it possible to use values of
>> another layer loaded in QGIS?
>>
>> For example. Point vector and I want to display as red each feature that
>> has a value greater than a value stored in another point layer (or in a
>> table).
>> In the expression builder there are the fields of the active layer.
>>
>> Is it possible to call the fields of other layers?
>>
>> Thanks
>>
>> Cheers
>>
>> Matteo
>>
>>
>>
>> _______________________________________________
>> Qgis-user mailing list
>> Qgis-user at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/qgis-user
>>
>
>
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Message: 8
Date: Thu, 26 Mar 2015 16:25:06 +0100
From: Andreas Neumann <a.neumann at carto.net>
To: qgis-user at lists.osgeo.org
Subject: Re: [Qgis-user] rule based classification - attribute based
??? on other layer
Message-ID: <551424D2.9010909 at carto.net>
Content-Type: text/plain; charset="windows-1252"; Format="flowed"

Hi,

Note that, if you work on QGIS 2.8, getFeature() and attribute() are 
already part of core - no need to install a plugin.

However, there may be a quite negative impact on performance, if you 
include such functions in your symbology impressions. So use them with 
care, only if you really need them!

Andreas

On 26.03.2015 16:10, Matteo Ghetta wrote:
> sorry... plugin installed...
> I see all the functions in the field calculator but do you have a 
> small and quick example of what I am looking for?
> I don't understand the function to use..
>
> Thanks!
>
> Matteo
>
> 2015-03-25 19:11 GMT+01:00 Junior Delaz <delazj at gmail.com 
> <mailto:delazj at gmail.com>>:
>
>? ? Hello,
>? ? You may give a look to /getFeature/ function (combining or not
>? ? with function like /attribute/ or spatial ones). There is also
>? ? /RefFunctions/ plugin that may help to use values/fields of
>? ? another layer.
>? ? But unfortunately, there is no list of such layers nor their
>? ? fields in the dialog. You need to write them yourself and their
>? ? values.
>
>? ? 2015-03-25 18:14 GMT+01:00 Matteo Ghetta <matteo.ghetta at gmail.com
>? ? <mailto:matteo.ghetta at gmail.com>>:
>
>? ? ? ? Hi all,
>? ? ? ? very simple question.
>? ? ? ? In the rule-based classification (vector) is it possible to
>? ? ? ? use values of another layer loaded in QGIS?
>
>? ? ? ? For example. Point vector and I want to display as red each
>? ? ? ? feature that has a value greater than a value stored in
>? ? ? ? another point layer (or in a table).
>? ? ? ? In the expression builder there are the fields of the active
>? ? ? ? layer.
>
>? ? ? ? Is it possible to call the fields of other layers?
>
>? ? ? ? Thanks
>
>? ? ? ? Cheers
>
>? ? ? ? Matteo
>
>
>
>? ? ? ? _______________________________________________
>? ? ? ? Qgis-user mailing list
>? ? ? ? Qgis-user at lists.osgeo.org <mailto:Qgis-user at lists.osgeo.org>
>? ? ? ? http://lists.osgeo.org/mailman/listinfo/qgis-user
>
>
>
>
>
> _______________________________________________
> Qgis-user mailing list
> Qgis-user at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/qgis-user

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Message: 9
Date: Thu, 26 Mar 2015 18:27:44 +0100
From: "G. Allegri" <giohappy at gmail.com>
To: Peter Borissow <peter.borissow at yahoo.com>
Cc: "qgis-user at lists.osgeo.org" <qgis-user at lists.osgeo.org>
Subject: Re: [Qgis-user] BBox Filter for WFS
Message-ID:
??? <CAB4g1=yuK1w0xxbtr3i9wo8=MoT6_hAQ86nu7Tv1k=wJARnXAA at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

As Marco explained in the realted post on qgis-dev the bbox filter should
be used if "cahce features" option is turned off, but at the moment it
seems broken, maybe because of new improvements in the rendering process.
The issue has been already reported in http://hub.qgis.org/issues/11968

In the meanwhile a manual filter could be set within the WFS add layer
dialog.

giovanni

2015-03-26 16:07 GMT+01:00 G. Allegri <giohappy at gmail.com>:

> It's an intereseting question Peter.
> I've verified that the wfs provider still requests the whole data the
> first time, then it stores eveything (and create a spatial index for
> subsequent calls).
> I suppose that sponsoring this feature could be the right way to have it,
> but I'm curious to know what the latest answer from Marco was referring to
> (I mean within the svn code he indicates) [1]
>
> Giovanni
>
> [1] http://hub.qgis.org/issues/1421#note-4
>
> 2015-03-25 12:25 GMT+01:00 Peter Borissow <peter.borissow at yahoo.com>:
>
>> Sorry for being impatient but I was wondering if anyone can shed some
>> light on this issue.
>>
>> I have a WFS that's serving out over a billion features (several million
>> records per layer). When I add a layer from the WFS into QGIS, it calls
>> DescribeFeature and then GetFeature without a BBOX filter. QGIS then waits
>> for ALL of the data to come back (which can take a while).
>>
>> In the past, there was an option only fetch features that intersect the
>> current map extent. Without this option, it is extremely difficult to do
>> anything with the WFS using QGIS.
>>
>> IMHO, this is a pretty significant bug but hopefully one that should be
>> really easy to fix. Afterall, the code was there at some point...
>>
>>
>> Related (unanswered) questions on stack exchange:
>>
>>
>> http://gis.stackexchange.com/questions/53387/quantumgis-1-8-how-to-define-bounding-box-within-add-wfs-layer-dialog
>>
>> http://gis.stackexchange.com/questions/59656/is-there-free-desktop-wfs-client-with-bbox-support
>>
>> Thanks,
>> Peter
>>
>>
>>
>>? ------------------------------
>>? *From:* Peter Borissow <peter.borissow at yahoo.com>
>> *To:* "qgis-user at lists.osgeo.org" <qgis-user at lists.osgeo.org>
>> *Sent:* Monday, March 23, 2015 2:03 PM
>> *Subject:* BBox Filter for WFS
>>
>> Hello-
>>? ? I noticed that the WFS client in QGIS 2.8 and 2.6 do not seem to pass
>> a bbox filter when requesting features.
>>
>> It seems that in the past, QGIS had an option to only fetch features that
>> intersect the current map extent:
>>
>> http://hub.qgis.org/issues/1421
>>
>> Based on this thread, it looks like this feature was disabled in 1.8:
>>
>> http://osdir.com/ml/qgis-user-gis/2011-10/msg00308.html
>>
>> Is this feature still missing or is there a way to enable this feature in
>> the latest release?
>>
>>
>> Thanks,
>> Peter
>>
>>
>>
>>
>>
>> _______________________________________________
>> Qgis-user mailing list
>> Qgis-user at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/qgis-user
>>
>
>
>
> --
> Giovanni Allegri
> http://about.me/giovanniallegri
> Gis3W - http://gis3w.it
> Ikare - http://ikare.it
> Twitter: https://twitter.com/_giohappy_
> blog: http://blog.spaziogis.it
> GEO+ geomatica in Italia http://bit.ly/GEOplus
>

-- 
Giovanni Allegri
http://about.me/giovanniallegri
Gis3W - http://gis3w.it
Ikare - http://ikare.it
Twitter: https://twitter.com/_giohappy_
blog: http://blog.spaziogis.it
GEO+ geomatica in Italia http://bit.ly/GEOplus
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