Re: [Qgis-user] SAGA Issues

[Kirk Schmidt]

Hi All:

My short term work around is to run simple batch files (windows 
environment) to handle the saga processing.  Not very elegant, but it 
gets the job done.  Be aware that different SAGA versions may have 
different syntax.


Kirk Schmidt

On 1/4/2022 3:48 PM, i...@jcis.net.au wrote:


I am certainly not an expert,  but the SAGA issue has been discussed 
by the redoubtable Hans van der Kwast in a video in the QGIS Open Day 
session on Processing Provider plugins: https://youtu.be/9fWQZqPjPVk . 
I believe the issue lies with more recent versions  of QGIS using a 
more recent version of SAGA but SAGA not being integrated into QGIS in 
the way it previously was.


All sorts of QGIS Gurus are discussing this and at some point the 
clouds will open and a stone tablet will be issued.



It would be really great to have a fix for tis issue as the SAGA tools 
are really useful.


Cheers

*Dr Iain Stuart*

*/JCIS Consultants /*

P.O. Box 2397

Burwood North

NSW, 2134

(02) 9701 0191
(0413) 380116 (m)


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--
Kirk Schmidt, MScF, BScF, RPF
General Manager
Nortek Resource Solutions Inc.
26 Church Road
Sutherlands River, NS
B0K 1W0
Tel (902) 922.3607
Email:k...@nortekresources.com
Web:www.nortekresources.com
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[Qgis-user] SAGA Issues

[Iain]

I am certainly not an expert,  but the SAGA issue has been discussed by the
redoubtable Hans van der Kwast in a video in the QGIS Open Day session on
Processing Provider plugins: https://youtu.be/9fWQZqPjPVk . I believe the
issue lies with more recent versions  of QGIS using a more recent version of
SAGA but SAGA not being integrated into QGIS in the way it previously was. 



All sorts of QGIS Gurus are discussing this and at some point the clouds
will open and a stone tablet will be issued.


It would be really great to have a fix for tis issue as the SAGA tools are
really useful.

 

Cheers

 

Dr Iain Stuart

JCIS Consultants 

P.O. Box 2397

Burwood North

NSW, 2134

 

(02) 9701 0191
(0413) 380116 (m)

 

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Re: [Qgis-user] Wrong area count QGIS 3.20+?

[Sebastian Gutwein]

Happy to help!

On Tue, Jan 4, 2022 at 2:04 PM Sadowski Jarosław 
wrote:

> Dear Sebastian,
>
>
>
> I am very grateful to you for taking on my case in such depth.
>
> Now everything is clear to me, thank you kindly for your answer.
>
> I will spread this knowledge further on local QGIS community and Polish
> internet QGIS forums.
>
>
>
> with best regards
>
> and greetings to the entire community of this amazing open-source project
>
> Jarosław Sadowski
>
> *_*
>
> *Jarosław Sadowski*
> Ekspert ds. Baz Danych i Analiz Przestrzennych | *Biuro Strategii i
> Planowania, Projektowania i Inżynierii Podprogramu Kolejowego*
> *Database and Spatial Analysis Expert |Railway Subprogramme Strategy &
> Planning, Design & Engineering Department*
> e: jaroslaw.sadow...@cpk.pl
>
> *From:* Sebastian Gutwein 
> *Sent:* Monday, January 3, 2022 3:47 PM
> *To:* Sadowski Jarosław 
> *Cc:* qgis-user@lists.osgeo.org
> *Subject:* Re: [Qgis-user] Wrong area count QGIS 3.20+?
>
>
>
> Nie otrzymujesz często wiadomości e-mail z adresu b...@rdgland.com. Dowiedz
> się, dlaczego jest to ważne 
>
> Ok to add to the fun I tried the calculations in ArcPro and interestingly
> if I run it using calculate field with this expression 
> *!shape.geodesicArea@hectares
> !* I get the QGIS 3.22 value of 31271112
> but if I run Geoprossessing Add Geometry Attributes I get the QGIS 3.16
> value of 31271108.
>
> So if you want them to match I guess you should use the python expression
> in ArcGIS Pro!
>
>
>
> I guess we are back to the old adage of All Measuring is Guessing.
>
> -Bas
>
>
>
>
>
>
>
> On Mon, Jan 3, 2022 at 8:43 AM Sebastian Gutwein  wrote:
>
> Yes that was my read as well except previously it was the Grass method and
> now it is Geographic Lib method because that is theoretically more accurate
> and is the same method that is used in Postgis and other places. The
> switched happened because someone noticed the difference between QGIS’s
> calculations and Postgis’s calculations. If I am reading the pull requests
> correctly even Grass has switched to the Geographic Lib method. I’m
> surprised that ArcGIS Pro uses the same method as the Grass method.
>
>
>
> On Mon, Jan 3, 2022 at 2:57 AM Sadowski Jarosław 
> wrote:
>
> Sebastian,
>
>
>
> thank you very much for your precise answer and materials sent - I have
> read them carefully.
>
>
>
> So, as far as I can understand, QGIS has moved in version 3.20 to a new
> way of counting areas (other libraries? GRASS algorithm instead of
> Geographic lib? I have actually noticed a different nomenclature and
> definition of EPSG 2180 for some time in new versions…), that will be more
> accurate?
>
>
>
> I must admit that, for me as a GIS operator, it is surprising and sounds
> like bad news - so far surfaces have always been the same in various GIS
> software, whether or not it was open-source or commercial (ArcGIS Pro). So
> from this moment it will be that I will get different surfaces depending on
> the software it was calculated? :(
>
> with kind regards
> JS
>
> *_*
>
> *Jarosław Sadowski*
> Ekspert ds. Baz Danych i Analiz Przestrzennych | *Biuro Strategii i
> Planowania, Projektowania i Inżynierii Podprogramu Kolejowego*
> *Database and Spatial Analysis Expert |Railway Subprogramme Strategy &
> Planning, Design & Engineering Department*
> e: jaroslaw.sadow...@cpk.pl
>
> *From:* Sebastian Gutwein 
> *Sent:* Saturday, January 1, 2022 7:13 AM
> *To:* Sadowski Jarosław 
> *Cc:* qgis-user@lists.osgeo.org
> *Subject:* Re: [Qgis-user] Wrong area count QGIS 3.20+?
>
>
>
> Nie otrzymujesz często wiadomości e-mail z adresu b...@rdgland.com. Dowiedz
> się, dlaczego jest to ważne 
>
> There was some discussion on this in the list serve back in January
> 
> that resulted in this feature request
> 
> and this pull request
> 

Re: [Qgis-user] Wrong area count QGIS 3.20+?

[Sadowski Jarosław]

Dear Sebastian,

I am very grateful to you for taking on my case in such depth.
Now everything is clear to me, thank you kindly for your answer.
I will spread this knowledge further on local QGIS community and Polish 
internet QGIS forums.

with best regards
and greetings to the entire community of this amazing open-source project
Jarosław Sadowski

_

Jarosław Sadowski
Ekspert ds. Baz Danych i Analiz Przestrzennych | Biuro Strategii i Planowania, 
Projektowania i Inżynierii Podprogramu Kolejowego
Database and Spatial Analysis Expert |Railway Subprogramme Strategy & Planning, 
Design & Engineering Department
e: jaroslaw.sadow...@cpk.pl

From: Sebastian Gutwein 
Sent: Monday, January 3, 2022 3:47 PM
To: Sadowski Jarosław 
Cc: qgis-user@lists.osgeo.org
Subject: Re: [Qgis-user] Wrong area count QGIS 3.20+?


Nie otrzymujesz często wiadomości e-mail z adresu 
b...@rdgland.com. Dowiedz się, dlaczego jest to 
ważne

Ok to add to the fun I tried the calculations in ArcPro and interestingly if I 
run it using calculate field with this expression 
!shape.geodesicArea@hectares! I get the 
QGIS 3.22 value of 31271112 but if I run Geoprossessing Add Geometry Attributes 
I get the QGIS 3.16 value of 31271108.
[cid:image001.png@01D801A6.3464F4A0]
So if you want them to match I guess you should use the python expression in 
ArcGIS Pro!

I guess we are back to the old adage of All Measuring is Guessing.
-Bas



On Mon, Jan 3, 2022 at 8:43 AM Sebastian Gutwein 
mailto:b...@rdgland.com>> wrote:
Yes that was my read as well except previously it was the Grass method and now 
it is Geographic Lib method because that is theoretically more accurate and is 
the same method that is used in Postgis and other places. The switched happened 
because someone noticed the difference between QGIS's calculations and 
Postgis's calculations. If I am reading the pull requests correctly even Grass 
has switched to the Geographic Lib method. I'm surprised that ArcGIS Pro uses 
the same method as the Grass method.

On Mon, Jan 3, 2022 at 2:57 AM Sadowski Jarosław 
mailto:jaroslaw.sadow...@cpk.pl>> wrote:
Sebastian,

thank you very much for your precise answer and materials sent - I have read 
them carefully.

So, as far as I can understand, QGIS has moved in version 3.20 to a new way of 
counting areas (other libraries? GRASS algorithm instead of Geographic lib? I 
have actually noticed a different nomenclature and definition of EPSG 2180 for 
some time in new versions...), that will be more accurate?

I must admit that, for me as a GIS operator, it is surprising and sounds like 
bad news - so far surfaces have always been the same in various GIS software, 
whether or not it was open-source or commercial (ArcGIS Pro). So from this 
moment it will be that I will get different surfaces depending on the software 
it was calculated? :(

with kind regards
JS

_

Jarosław Sadowski
Ekspert ds. Baz Danych i Analiz Przestrzennych | Biuro Strategii i Planowania, 
Projektowania i Inżynierii Podprogramu Kolejowego
Database and Spatial Analysis Expert |Railway Subprogramme Strategy & Planning, 
Design & Engineering Department
e: jaroslaw.sadow...@cpk.pl


From: Sebastian Gutwein mailto:b...@rdgland.com>>
Sent: Saturday, January 1, 2022 7:13 AM
To: Sadowski Jarosław 
mailto:jaroslaw.sadow...@cpk.pl>>
Cc: qgis-user@lists.osgeo.org
Subject: Re: [Qgis-user] Wrong area count QGIS 3.20+?


Nie otrzymujesz często wiadomości e-mail z adresu 
b...@rdgland.com. Dowiedz się, dlaczego jest to 
ważne

There was some discussion on this in the list serve back in 
January
 that resulted in this feature 
request
 and this pull 

[Qgis-user] Step-up for OGC compliance

[Marco Bernasocchi]

Dear Community,

maintaining the OGC compliance for QGIS server is a very time consuming
undertaking that up to now was completely relying on the volunteer work of
very few community members. Unfortunately Régis cannot follow this anymore
(Thanks a lot Régis for all the work you put in!).

We therefore are looking for community members to take over the lead on
this.

Ideally, we'd also like to see organisations that rely on QGIS server
certification to step-up financially to support the big workload needed.

If you have any questions, do not hesitate to contact me

Cheers
Marco




-- 
Marco Bernasocchi

QGIS.org Chair
OPENGIS.ch CEO
http://berna.io
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