Re: [Qgis-user] Mac OS X testing for QGIS 3

[Burghardt.Scholle]

Hi John,

thank you for your nice reply. I'm just a QGIS user and work primarily under 
Linux and Windows. But for testing purposes, I frequently use my MacBook Air. 
So I will continue trying to get QGIS 3 running on Mac OS X.

Regards
Burghardt


> -Ursprüngliche Nachricht-
> Von: John Harrop [mailto:jchar...@gmail.com]
> Gesendet: Mittwoch, 14. Februar 2018 18:21
> An: Scholle, Burghardt (15-3 GIS)
> Cc: qgis-user@lists.osgeo.org
> Betreff: Re: [Qgis-user] Mac OS X testing for QGIS 3
> 
> Burghardt,
> 
> Thanks for the pointers, they seen much more up to date than the older
> ones pointed to by the QGIS web site.
> 
> I’ve been trying to build from the notes since you posted your suggestion
> and I see what you mean about the matplotlib problem. I forked the Mac OS
> X build notes on GitHub and started to work on them to see if I could get a
> working set for the matplotlib problems but not much luck.  However, I do
> seem to have it installed through pip or otherwise, so I worked past that step
> and have been trying to get CMake to configure a makefile but there are
> problems there as well.  I fixed a missing library by manually installing but 
> I’m
> now having problems with Qt5Positioning which is not being found.
> 
> its been a while since I was active in configuring build systems so I’m having
> to clean off the dust in my memories and learn newer versions of the
> systems.
> 
> I get the impression that not much has been going on with Mac OS X dev
> builds for at least a few months and quite a few dependancies have changed
> over that time.  I’ll keep working on this and hopefully there are some other
> GIS testers also interested in the Macs.
> 
> Let me know if you are still trying to get the Mac OS X dev build working or 
> if
> you have had success.
> 
> Regards,
> 
> John Harrop
> jchar...@gmail.com
> 
> 
> 
> > On Feb 8, 2018, at 10:22 PM, burghardt.scho...@stadt.wolfsburg.de wrote:
> >
> > Hi John,
> >
> > I believe there is no current complete dmg-file for QGIS3-dev. But you can
> use the excellent site under [1] to install QGIS3-dev using Homebrew.
> Unfortunately, there are problems with the matplotlib dependency at the
> moment (see [2]). Yersterday I've tried to install the current version but it
> failed.
> >
> > Even so I hope that my hints help.
> >
> > Regards
> > Burghardt
> >
> >
> > [1]
> > https://github.com/qgis/homebrew-
> qgisdev/blob/master/development/READM
> > E.md [2] https://github.com/qgis/homebrew-qgisdev/issues/50
> >
> >> -Ursprüngliche Nachricht-
> >> Von: Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] Im Auftrag
> >> von John Harrop
> >> Gesendet: Donnerstag, 8. Februar 2018 19:53
> >> An: qgis-user@lists.osgeo.org
> >> Betreff: [Qgis-user] Mac OS X testing for QGIS 3
> >>
> >> Hello,
> >>
> >> Is it possible to be involved in OS X testing of the QGIS 3 beta?
> >> There are parts of the web site that suggest it is, but I have not
> >> been able to find a web age for up to date downloads.
> >>
> >> Thanks,
> >>
> >> John Harrop
> >> jchar...@gmail.com
> >>
> >>
> >>
> >> ___
> >> 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

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Re: [Qgis-user] Can’t respond to the user list

[Alexandre Neto]

Could you be using some service to send your emails that don't match the
email address that you used to subscribe the list?

You probably will need the help of the list administrator to figure this
out. But I am not sure who that may be...

Nicolas Cadieux  escreveu no dia quarta,
14/02/2018 às 14:54:

> Hi,
>
> I receive emails from this list and I can write question to the list but I
> canot answer to posts.  If I do, I receive a message saying I cannot post
> to the list!? I did send emails in the past to the list admin but the
> problem is persistent.  Does anyone have this problem and what could be the
> solution.
>
> You will need to add your personal email if you want an answer from me.
> Like I say, all my responses will be blocked by the server.
>
> Nicolas
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-- 
Alexandre Neto
-
@AlexNetoGeo
http://sigsemgrilhetas.wordpress.com
http://gisunchained.wordpress.com
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Re: [Qgis-user] Mac OS X testing for QGIS 3

[David Liontooth]

  
  

  Hi John,
  
  Good question. MacPort keeps most things in /opt/local/, so if
  homebrew puts files elsewhere you could likely install in parallel
  and switch by changing $PATH in ~/.profile.
  
  Here's what .profile looks like after a MacPorts installation,
  with GNU tools switched to MacPorts:
  
  # MacPorts Installer adding an appropriate PATH variable for use
  with MacPorts.
  export
  PATH=/opt/local/bin:/opt/local/sbin:/opt/local/libexec/gnubin/:$PATH
  
  Cheers,
  David
  
  
  On 2/14/18 12:30 PM, John Harrop wrote:


  
  That looks interesting David.  Thanks.
  
  
  How much uninstall on Homebrew is recommended before
switching to this MacPorts?  The work looks quite active on
MacPorts but I don’t see much on potential Homebrew or Anaconda
conflicts.



  John Harrop
  jchar...@gmail.com
  
  
  


  
On Feb 14, 2018, at 11:52 AM, David Liontooth
  
  wrote:


  Vincent at Macports has done a
great job packaging qgis3, cf. https://trac.macports.org/ticket/55020
  
  grass7 was just upgraded to 7.4,
postgresql10 to 10.2.
  
  qgis3 is at 20180124.
  
  Cheers,
  David
  
  On 2/14/18 11:18 AM, Madry, Scott
wrote:
  Hi all.

As a dedicated Mac QGIS user, trainer, and research. I
want to put in a plea to keep the Mac OS development
process on pace. There are many of us out there who use
the Mac OS version, and we need to get these issues with
matplotlib, GRASS, and others addresses so that we have
a good 3.0 rollout.

I would be happy to assist with testing, thanks for all
your efforts,

Scott

Scott Madry, Ph.D.
Research Associate Professor of Archaeology
The University of North Carolina at Chapel Hill

Tel         1-919-448-4493
Email: mad...@email.unc.edu 
https://scottmadry.web.unc.edu
Skype:   scott madry

On Feb 14, 2018, at
  12:20 PM, John Harrop >
  wrote:
  
  Burghardt,
  
  Thanks for the pointers, they seen much more up to
  date than the older ones pointed to by the QGIS web
  site.
  
  I’ve been trying to build from the notes since you
  posted your suggestion and I see what you mean about
  the matplotlib problem. I forked the Mac OS X build
  notes on GitHub and started to work on them to see if
  I could get a working set for the matplotlib problems
  but not much luck.  However, I do seem to have it
  installed through pip or otherwise, so I worked past
  that step and have been trying to get CMake to
  configure a makefile but there are problems there as
  well.  I fixed a missing library by manually
  installing but I’m now having problems with
  Qt5Positioning which is not being found.
  
  its been a while since I was active in configuring
  build systems so I’m having to clean off the dust in
  my memories and learn newer versions of the systems.
  
  I get the impression that not much has been going on
  with Mac OS X dev builds for at least a few months and
  quite a few dependancies have changed over that time.
   I’ll keep working on this and hopefully there are
  some other GIS testers also interested in the Macs.
  
  Let me know if you are still trying to get the Mac OS
  X dev build working or if you have had success.
  
  Regards,
  
  John Harrop
  jchar...@gmail.com 
  
  
  
  On Feb 8, 2018, at
10:22 PM, burghardt.scho...@stadt.wolfsburg.de
wrote:

Hi John,
 

Re: [Qgis-user] Mac OS X testing for QGIS 3

[John Harrop]

That looks interesting David.  Thanks.

How much uninstall on Homebrew is recommended before switching to this 
MacPorts?  The work looks quite active on MacPorts but I don’t see much on 
potential Homebrew or Anaconda conflicts.


John Harrop
jchar...@gmail.com



> On Feb 14, 2018, at 11:52 AM, David Liontooth  wrote:
> 
> 
> Vincent at Macports has done a great job packaging qgis3, cf. 
> https://trac.macports.org/ticket/55020 
> 
> 
> grass7 was just upgraded to 7.4, postgresql10 to 10.2.
> 
> qgis3 is at 20180124.
> 
> Cheers,
> David
> 
> On 2/14/18 11:18 AM, Madry, Scott wrote:
>> Hi all.
>> 
>> As a dedicated Mac QGIS user, trainer, and research. I want to put in a plea 
>> to keep the Mac OS development process on pace. There are many of us out 
>> there who use the Mac OS version, and we need to get these issues with 
>> matplotlib, GRASS, and others addresses so that we have a good 3.0 rollout.
>> 
>> I would be happy to assist with testing, thanks for all your efforts,
>> 
>> Scott
>> 
>> Scott Madry, Ph.D.
>> Research Associate Professor of Archaeology
>> The University of North Carolina at Chapel Hill
>> 
>> Tel 1-919-448-4493
>> Email: mad...@email.unc.edu  
>> >
>> https://scottmadry.web.unc.edu 
>> Skype:   scott madry
>> 
>>> On Feb 14, 2018, at 12:20 PM, John Harrop >>  >> >> wrote:
>>> 
>>> Burghardt,
>>> 
>>> Thanks for the pointers, they seen much more up to date than the older ones 
>>> pointed to by the QGIS web site.
>>> 
>>> I’ve been trying to build from the notes since you posted your suggestion 
>>> and I see what you mean about the matplotlib problem. I forked the Mac OS X 
>>> build notes on GitHub and started to work on them to see if I could get a 
>>> working set for the matplotlib problems but not much luck.  However, I do 
>>> seem to have it installed through pip or otherwise, so I worked past that 
>>> step and have been trying to get CMake to configure a makefile but there 
>>> are problems there as well.  I fixed a missing library by manually 
>>> installing but I’m now having problems with Qt5Positioning which is not 
>>> being found.
>>> 
>>> its been a while since I was active in configuring build systems so I’m 
>>> having to clean off the dust in my memories and learn newer versions of the 
>>> systems.
>>> 
>>> I get the impression that not much has been going on with Mac OS X dev 
>>> builds for at least a few months and quite a few dependancies have changed 
>>> over that time.  I’ll keep working on this and hopefully there are some 
>>> other GIS testers also interested in the Macs.
>>> 
>>> Let me know if you are still trying to get the Mac OS X dev build working 
>>> or if you have had success.
>>> 
>>> Regards,
>>> 
>>> John Harrop
>>> jchar...@gmail.com  >> >
>>> 
>>> 
>>> 
 On Feb 8, 2018, at 10:22 PM, burghardt.scho...@stadt.wolfsburg.de wrote:
 
 Hi John,
 
 I believe there is no current complete dmg-file for QGIS3-dev. But you can 
 use the excellent site under [1] to install QGIS3-dev using Homebrew.  
 Unfortunately, there are problems with the matplotlib dependency at the 
 moment (see [2]). Yersterday I've tried to install the current version but 
 it failed.
 
 Even so I hope that my hints help.
 
 Regards
 Burghardt
 
 
 [1] 
 https://github.com/qgis/homebrew-qgisdev/blob/master/development/README.md 
 [2] https://github.com/qgis/homebrew-qgisdev/issues/50
 
> -Ursprüngliche Nachricht-
> Von: Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] Im Auftrag von
> John Harrop
> Gesendet: Donnerstag, 8. Februar 2018 19:53
> An: qgis-user@lists.osgeo.org
> Betreff: [Qgis-user] Mac OS X testing for QGIS 3
> 
> Hello,
> 
> Is it possible to be involved in OS X testing of the QGIS 3 beta?  There 
> are
> parts of the web site that suggest it is, but I have not been able to 
> find a web
> age for up to date downloads.
> 
> Thanks,
> 
> John Harrop
> jchar...@gmail.com
> 
> 
> 
> ___
> 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 mailing list
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>>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
>>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>> 
>> 
>> 
>> 

Re: [Qgis-user] Mac OS X testing for QGIS 3

[David Liontooth]

Vincent at Macports has done a great job packaging qgis3, cf. 
https://trac.macports.org/ticket/55020


grass7 was just upgraded to 7.4, postgresql10 to 10.2.

qgis3 is at 20180124.

Cheers,
David

On 2/14/18 11:18 AM, Madry, Scott wrote:

Hi all.

As a dedicated Mac QGIS user, trainer, and research. I want to put in 
a plea to keep the Mac OS development process on pace. There are many 
of us out there who use the Mac OS version, and we need to get these 
issues with matplotlib, GRASS, and others addresses so that we have a 
good 3.0 rollout.


I would be happy to assist with testing, thanks for all your efforts,

Scott

Scott Madry, Ph.D.
Research Associate Professor of Archaeology
The University of North Carolina at Chapel Hill

Tel         1-919-448-4493
Email: mad...@email.unc.edu 
https://scottmadry.web.unc.edu
Skype:   scott madry

On Feb 14, 2018, at 12:20 PM, John Harrop > wrote:


Burghardt,

Thanks for the pointers, they seen much more up to date than the 
older ones pointed to by the QGIS web site.


I’ve been trying to build from the notes since you posted your 
suggestion and I see what you mean about the matplotlib problem. I 
forked the Mac OS X build notes on GitHub and started to work on them 
to see if I could get a working set for the matplotlib problems but 
not much luck.  However, I do seem to have it installed through pip 
or otherwise, so I worked past that step and have been trying to get 
CMake to configure a makefile but there are problems there as well. 
 I fixed a missing library by manually installing but I’m now having 
problems with Qt5Positioning which is not being found.


its been a while since I was active in configuring build systems so 
I’m having to clean off the dust in my memories and learn newer 
versions of the systems.


I get the impression that not much has been going on with Mac OS X 
dev builds for at least a few months and quite a few dependancies 
have changed over that time.  I’ll keep working on this and hopefully 
there are some other GIS testers also interested in the Macs.


Let me know if you are still trying to get the Mac OS X dev build 
working or if you have had success.


Regards,

John Harrop
jchar...@gmail.com 




On Feb 8, 2018, at 10:22 PM, burghardt.scho...@stadt.wolfsburg.de wrote:

Hi John,

I believe there is no current complete dmg-file for QGIS3-dev. But 
you can use the excellent site under [1] to install QGIS3-dev using 
Homebrew.  Unfortunately, there are problems with the matplotlib 
dependency at the moment (see [2]). Yersterday I've tried to install 
the current version but it failed.


Even so I hope that my hints help.

Regards
Burghardt


[1] 
https://github.com/qgis/homebrew-qgisdev/blob/master/development/README.md 


[2] https://github.com/qgis/homebrew-qgisdev/issues/50


-Ursprüngliche Nachricht-
Von: Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] Im 
Auftrag von

John Harrop
Gesendet: Donnerstag, 8. Februar 2018 19:53
An: qgis-user@lists.osgeo.org
Betreff: [Qgis-user] Mac OS X testing for QGIS 3

Hello,

Is it possible to be involved in OS X testing of the QGIS 3 beta? 
 There are
parts of the web site that suggest it is, but I have not been able 
to find a web

age for up to date downloads.

Thanks,

John Harrop
jchar...@gmail.com



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Re: [Qgis-user] Mac OS X testing for QGIS 3

[Madry, Scott]

Hi all.

As a dedicated Mac QGIS user, trainer, and research. I want to put in a plea to 
keep the Mac OS development process on pace. There are many of us out there who 
use the Mac OS version, and we need to get these issues with matplotlib, GRASS, 
and others addresses so that we have a good 3.0 rollout.

I would be happy to assist with testing, thanks for all your efforts,

Scott

Scott Madry, Ph.D.
Research Associate Professor of Archaeology
The University of North Carolina at Chapel Hill

Tel 1-919-448-4493
Email:mad...@email.unc.edu
https://scottmadry.web.unc.edu
Skype:   scott madry

On Feb 14, 2018, at 12:20 PM, John Harrop 
> wrote:

Burghardt,

Thanks for the pointers, they seen much more up to date than the older ones 
pointed to by the QGIS web site.

I’ve been trying to build from the notes since you posted your suggestion and I 
see what you mean about the matplotlib problem. I forked the Mac OS X build 
notes on GitHub and started to work on them to see if I could get a working set 
for the matplotlib problems but not much luck.  However, I do seem to have it 
installed through pip or otherwise, so I worked past that step and have been 
trying to get CMake to configure a makefile but there are problems there as 
well.  I fixed a missing library by manually installing but I’m now having 
problems with Qt5Positioning which is not being found.

its been a while since I was active in configuring build systems so I’m having 
to clean off the dust in my memories and learn newer versions of the systems.

I get the impression that not much has been going on with Mac OS X dev builds 
for at least a few months and quite a few dependancies have changed over that 
time.  I’ll keep working on this and hopefully there are some other GIS testers 
also interested in the Macs.

Let me know if you are still trying to get the Mac OS X dev build working or if 
you have had success.

Regards,

John Harrop
jchar...@gmail.com



On Feb 8, 2018, at 10:22 PM, burghardt.scho...@stadt.wolfsburg.de wrote:

Hi John,

I believe there is no current complete dmg-file for QGIS3-dev. But you can use 
the excellent site under [1] to install QGIS3-dev using Homebrew.  
Unfortunately, there are problems with the matplotlib dependency at the moment 
(see [2]). Yersterday I've tried to install the current version but it failed.

Even so I hope that my hints help.

Regards
Burghardt


[1] https://github.com/qgis/homebrew-qgisdev/blob/master/development/README.md
[2] https://github.com/qgis/homebrew-qgisdev/issues/50

-Ursprüngliche Nachricht-
Von: Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] Im Auftrag von
John Harrop
Gesendet: Donnerstag, 8. Februar 2018 19:53
An: qgis-user@lists.osgeo.org
Betreff: [Qgis-user] Mac OS X testing for QGIS 3

Hello,

Is it possible to be involved in OS X testing of the QGIS 3 beta?  There are
parts of the web site that suggest it is, but I have not been able to find a web
age for up to date downloads.

Thanks,

John Harrop
jchar...@gmail.com



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Re: [Qgis-user] Mac OS X testing for QGIS 3

[John Harrop]

Burghardt,

Thanks for the pointers, they seen much more up to date than the older ones 
pointed to by the QGIS web site.

I’ve been trying to build from the notes since you posted your suggestion and I 
see what you mean about the matplotlib problem. I forked the Mac OS X build 
notes on GitHub and started to work on them to see if I could get a working set 
for the matplotlib problems but not much luck.  However, I do seem to have it 
installed through pip or otherwise, so I worked past that step and have been 
trying to get CMake to configure a makefile but there are problems there as 
well.  I fixed a missing library by manually installing but I’m now having 
problems with Qt5Positioning which is not being found.

its been a while since I was active in configuring build systems so I’m having 
to clean off the dust in my memories and learn newer versions of the systems.

I get the impression that not much has been going on with Mac OS X dev builds 
for at least a few months and quite a few dependancies have changed over that 
time.  I’ll keep working on this and hopefully there are some other GIS testers 
also interested in the Macs.

Let me know if you are still trying to get the Mac OS X dev build working or if 
you have had success.

Regards,

John Harrop
jchar...@gmail.com



> On Feb 8, 2018, at 10:22 PM, burghardt.scho...@stadt.wolfsburg.de wrote:
> 
> Hi John,
> 
> I believe there is no current complete dmg-file for QGIS3-dev. But you can 
> use the excellent site under [1] to install QGIS3-dev using Homebrew.  
> Unfortunately, there are problems with the matplotlib dependency at the 
> moment (see [2]). Yersterday I've tried to install the current version but it 
> failed.
> 
> Even so I hope that my hints help.
> 
> Regards 
> Burghardt
> 
> 
> [1] 
> https://github.com/qgis/homebrew-qgisdev/blob/master/development/README.md 
> [2] https://github.com/qgis/homebrew-qgisdev/issues/50 
> 
>> -Ursprüngliche Nachricht-
>> Von: Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] Im Auftrag von
>> John Harrop
>> Gesendet: Donnerstag, 8. Februar 2018 19:53
>> An: qgis-user@lists.osgeo.org
>> Betreff: [Qgis-user] Mac OS X testing for QGIS 3
>> 
>> Hello,
>> 
>> Is it possible to be involved in OS X testing of the QGIS 3 beta?  There are
>> parts of the web site that suggest it is, but I have not been able to find a 
>> web
>> age for up to date downloads.
>> 
>> Thanks,
>> 
>> John Harrop
>> jchar...@gmail.com
>> 
>> 
>> 
>> ___
>> 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

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[Qgis-user] Can’t respond to the user list

[Nicolas Cadieux]

Hi,

I receive emails from this list and I can write question to the list but I 
canot answer to posts.  If I do, I receive a message saying I cannot post to 
the list!? I did send emails in the past to the list admin but the problem is 
persistent.  Does anyone have this problem and what could be the solution. 

You will need to add your personal email if you want an answer from me.  Like I 
say, all my responses will be blocked by the server. 

Nicolas
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Re: [Qgis-user] View freezing and style

[Nyall Dawson]

On 14 February 2018 at 23:38, Enrico Fiore  wrote:
>
>> Il 14 febbraio 2018 alle 12.43 Nyall Dawson  ha 
>> scritto:
>> >
>>
>> Let me guess - it's a point layer?
>
> yes, it is
>
>> >
>> > Can be a bug?
>>
>> Yes, it is.
>
> I have to open a ticket?

I think there's already an open ticket. I looked into this a while
ago. The culprit is this line (added in 2.16, or 2.18. I can't
recall):

https://github.com/qgis/QGIS/blob/master/src/core/layertree/qgslayertreemodel.cpp#L1524

Which is very slow to calculate, and is called for every symbol in
your layer (so 2381 times) at every map pan/zoom operation.

I only had a brief opportunity to look into it and could not find a
quick fix for this.

Nyall
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Re: [Qgis-user] View freezing and style

[Richard McDonnell]

Hi,
That is a lot of Style filters to be applying, Is there any way you 
could reduce the Categorising?
The other thing is your Indexing, make sure the fields you are using in 
the style are indexed, along with the Geometry.

Regards,

Richard

On 14/02/2018 11:26, Enrico Fiore wrote:


Hi,
I have noticed that QGIS 2.18.16 has strange behavior, that I'm going 
to try to explain.


The view freezes for 3 - 4 seconds after zooming or dezooming action.
View freezing happen only if in the Project there is a specific layer 
with categorized style (the same layer with single simbol style 
doesn't cause the problem).
The layer has 130421 feature (point) and 2381 items in the legend 
(after have applied the style) and the datasource is db (The problem 
raised happens both with data deriving from Oracle and PostgreSQL 
database).



The behaviour didn't happen in qgis 2.8.4.

Has anyone experienced the same problem ?

Can be a bug?


Enrico



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Re: [Qgis-user] View freezing and style

[Enrico Fiore]

> Il 14 febbraio 2018 alle 12.43 Nyall Dawson  ha 
> scritto:
> >
> 
> Let me guess - it's a point layer?

yes, it is

> >
> > Can be a bug?
> 
> Yes, it is.

I have to open a ticket?
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Re: [Qgis-user] View freezing and style

[Nyall Dawson]

On 14 February 2018 at 22:26, Enrico Fiore  wrote:
> Hi,
> I have noticed that QGIS 2.18.16 has strange behavior, that I'm going to try
> to explain.
>
> The view freezes for 3 - 4 seconds after zooming or dezooming action.
> View freezing happen only if in the Project there is a specific layer with
> categorized style (the same layer with single simbol style doesn't cause the
> problem).
> The layer has 130421 feature (point) and 2381 items in the legend (after
> have applied the style) and the datasource is db (The problem raised happens
> both with data deriving from Oracle and PostgreSQL database).
>

Let me guess - it's a point layer?


> The behaviour didn't happen in qgis 2.8.4.
>
> Has anyone experienced the same problem ?
>
> Can be a bug?

Yes, it is.

Nyall
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[Qgis-user] View freezing and style

[Enrico Fiore]

Hi,
I have noticed that QGIS 2.18.16 has strange behavior, that I'm going to try to 
explain.

The view freezes for 3 - 4 seconds after zooming or dezooming action.
View freezing happen only if in the Project there is a specific layer with 
categorized style (the same layer with single simbol style doesn't cause the 
problem).
The layer has 130421 feature (point) and 2381 items in the legend (after have 
applied the style) and the datasource is db (The problem raised happens both 
with data deriving from Oracle and PostgreSQL database).
 

The behaviour didn't happen in qgis 2.8.4.

Has anyone experienced the same problem ?

Can be a bug?


Enrico
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Re: [QGIS-it-user] QGIS e

[Totò]

Enrico Fiore-2 wrote
> Ciao,
> 
> scusate se mi intrometto, ma perchè occorre creare un nuovo campo
> geometry. non si può utilizzare direttamente CastToMultiPolygon() nella
> query di partenza?
> 
> select COMUNE, CastToMultiPolygon(st_intersection (clc.geom, com.geom)) as
> geom, count (*)as
> nro,
> (sum (st_area( st_intersection (clc.geom, com.geom)))/st_area(com.geom))
> as
> indice
> from CLC_Molise clc, comuni_molise com
> where liv_3 like 'Boschi %' and st_intersects (clc.geom, com.geom) = 1
> group by 1
> order by indice desc;

Ciao,
si, certo che si può fare.

grazie per l'osservazione.

La creazione di un altro campo geom2 è nato per ovviare al problema, cioè la
tabella esisteva già.

saluti




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Re: [QGIS-it-user] QGIS e

[Enrico Fiore]

Ciao,

scusate se mi intrometto, ma perchè occorre creare un nuovo campo geometry. non 
si può utilizzare direttamente CastToMultiPolygon() nella query di partenza?

select COMUNE, CastToMultiPolygon(st_intersection (clc.geom, com.geom)) as 
geom, count (*)as
nro,
(sum (st_area( st_intersection (clc.geom, com.geom)))/st_area(com.geom))
as
indice
from CLC_Molise clc, comuni_molise com
where liv_3 like 'Boschi %' and st_intersects (clc.geom, com.geom) = 1
group by 1
order by indice desc;

> 
> Il 13 febbraio 2018 alle 16.41 Totò  ha 
> scritto:
> 
> pcav wrote
> 
> > > 
> > Probabilmente perché restituisce una geomertycollection?
> > 
> > > 
> SI, la query restituisce una geomertycollection cioè:
> facendo un check della geometria ho due record; polygon e multipolygon;
> 
> come scritto sopra, Furieri ha spiegato che basti creare un altro campo
> geom2 e popolarlo forzando, come tipologia di geometria, multipolygon.
> 
> saluti
> 
> -
> 
> https://pigrecoinfinito.wordpress.com/
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