Re: [Qgis-user] Questions for internal approval

[Andreas Neumann via QGIS-User]

Dear James,

I am responding below to your questions. You can find responses to all of
your questions on our homepage, however.

Greetings,
Andreas

On Wed, 4 Sept 2024 at 05:02, James Khng via QGIS-User <
qgis-user@lists.osgeo.org> wrote:

> Hi Team
>
>
>
> I am trying to get this software approved for installation with our
> internal IT Team.
>
>
>
> They have come back with the following questions. Any help would be much
> appreciated!
>
>
>
>- Who supports the application? Is there an enterprise agreement or is
>it self-supported?
>
>
It is up to you if you want to self-support, use community support (with no
guaranteed responses) or use commercial support, also with an enterprise
agreement.

See https://www.qgis.org/resources/support/ and
https://www.qgis.org/resources/support/commercial-support/

>
>
>- Who is responsible for patching/upgrading? Also, is there any
>schedule available?
>
>
As always: the local IT team. We do have a schedule/roadmap at
https://www.qgis.org/resources/roadmap/#schedule


>
>
>- What is the incident response plan, process/procedure? Who will be
>the responsible team if there is any security incident related to this
>product?
>
>
If you go for commercial support, it is your commercial support provider.
QGIS as a community project tries to fix security related issues with high
priority. The terms of the GPL license apply. See also
https://www.qgis.org/resources/support/security/

>
>
>- Is there a vendor critical patch notification mailing list?
>
>
Well, all the releases of QGIS are public. We usually use our release
schedule, unless, there is some extra important issue that justifies an
extra, off-schedule release.

>
>
>- Is there any certified image? (Malware/Trojan free)
>
>
Our Windows and Ubuntu packages are signed with a certificate.


>
>
>- Who is providing the technical support?
>
>
See above


>
>- Is there best practice defined for hardening/configuration by vendor?
>
>
QGIS is a very open system. It can connect to numerous web services, allows
to extend it with Python plugins. It is in the responsibility of the IT
team and user to make sure you do not connect to malicious services or
install a malicious plugin. Also, it is in the responsibility of the local
IT team to make sure that the firewall in the local network is set up
according to modern standards.


>
>- Is there any documentation available for this application?
>
>
Of course: https://www.qgis.org/resources/hub/


>
>- Is there any logging or SIEM capability?
>
>
Can you be more specific what you mean here? What should be logged?

>
>
>- Will there be single sign-on and MFA implemented for this
>application?
>
>
QGIS supports many database and web service providers. It depends on the
provider and configuration. Also, this can be discussed with your
commercial QGIS support company.


>
>
>- Will this application be routed through PAM or will local admin
>access be required
>
>
No local admin access is required to run QGIS.


>
>-
>
>
>
>
>
>
>
> Thanks
>
> James
>
>
>
>
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Re: [Qgis-user] seeing coordinates in the data table

[Andreas Neumann via QGIS-User]

Hi Greg,

You can create a virtual column that shows the geometry values in a 
human readable form. For points it is trivial. Just use $x and $y as 
expressions, for other geometry types you can write out the WKT string.


https://docs.qgis.org/3.34/en/docs/user_manual/working_with_vector/attribute_table.html#creating-a-virtual-field

Hope this helps,

Andreas

On 2024-09-02 21:37, Greg Troxel via QGIS-User wrote:


When I open the data table, I can't find a way to see the geometry
object, in either layer CRS or project CRS.

I do see a way to generate a layer which has the attributes as fields:

https://docs.qgis.org/3.34/en/docs/user_manual/processing_algs/qgis/vectorgeometry.html#add-geometry-attributes

But I don't really  want to make a layer (which is a copy not a view).
I just want the data table to show me the geometry, because it is a
column and has a value.  (I don't mind that it is read only.)

Perhaps I should be using postgis and views to make a layer with extra
fields.  Any other advice?

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Re: [Qgis-user] Rendering shared exterior boundaries of adjacent polygon features

[Andreas Neumann via QGIS-User]

Hi Tim,

Are you looking for the "Draw line only inside polygon" feature 
described at 
http://nyalldawson.net/2014/01/qgis-two-neat-features-in-2-2/ ?


In that case you would probably have two symbol levels:

- one for the line pattern fill (cross-hatched)

- a second one on top of the other one drawing an "Outline:simple line" 
on top of it using the "Draw line only inside polygon" checkbox.


This is only briefly described at 
https://docs.qgis.org/3.34/en/docs/user_manual/style_library/symbol_selector.html


Quote:

_Outline: simple line: uses a simple line symbol layer to represent the 
polygon boundary (Rings) which can be the interior rings only, the 
exterior ring only or all the rings). The Draw line only inside polygon 
option displays the polygon borders inside the polygon and can be useful 
to clearly represent adjacent polygon boundaries. The other settings for 
the outline simple line are the same as for simple line symbols._


But perhaps I am totally misunderstanding your request ...

Greetings,

Andreas

On 2024-06-20 03:26, Tim Malloy via QGIS-User wrote:


Fellow QGIS Users -

I'm trying to determine if its possible to have QGIS render the 
exterior boundary of polygon features only once when that boundary is 
shared with an adjacent feature (don't render overlapping exterior 
boundaries for both polygon features).  The data I'm working with is a 
county parcels layer and the symbology I'm using for this layer is a 
cross hatched line fill with a separate component for the outline of 
the polygons.  I've tried a couple of expressions (examples below) 
including one geometry generator and one data defined override for the 
stroke width of the boundary line but none of them achieves my 
objective.  I'm using QGIS 3.34.7 and my coding skills are limited.  I 
feel like I've seen this issue covered somewhere but have been unable 
to find a solution after extensive online exploration.


Method #1:  "boundary( difference( $geometry, aggregate( 'union', 
'intersects', $geometry, other_layer := @layer)))"  This expression was 
used on the outline component of the symbology described above.


Method #2:  "CASE WHEN intersects( $geometry, geom_to_wkt( boundary( 
$geometry ))) THEN 0  ELSE 1 END"  Here I switched to using an 
expression on the stroke width of a simple fill, but I got an error 
message saying "Cannot convert to geometry".


Any input would be greatly appreciated.

Tim

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Re: [Qgis-user] Temporal Controller on client side of QWC2

[Andreas Neumann via QGIS-User]

Hi again,

It seems like LizMap has some support for temporal controller:

https://docs.lizmap.com/next/en/publish/lizmap_plugin/time_manager.html

But as I said - this works through sending vector data and client side 
rendering - so not the full capabilities of the QGIS styling engine.


Greetings,

Andreas

On 2024-06-06 06:41, Andreas Neumann via QGIS-User wrote:


Hi BJ,

No - I don't think this is possible. But I am not fully up-to-date 
about QWC2, as I am not an active user. You might want to ask at the 
separate QWC2 user mailing list: 
https://lists.osgeo.org/mailman/listinfo/qgis-qwc2


Personally, I have doubts about the feasibility of integrating the 
temporal controller with QGIS server and any web client that relies on 
raster images. QGIS server is sending raster images of map extents. 
That approach wouldn't scale very well, due to the additional lag 
between client and server. To get an acceptable performance, it would 
mean that one would have to exchange vector features (geometry and 
attributes) and render client-side - and then you loose the QGIS 
symbology features ...


It might be more feasible to use QGIS wasm (web assembly) for this 
purpose. But it is still a young project. In QGIS wasm, the QGIS 
rendering engine runs inside the browser. It is also generating raster 
images, but it would hold the original GIS data in the client and also 
render in the client, eliminating the network lag between server and 
client. There you would maintain the QGIS rendering and labeling 
capabilities.


If you have a serious interest in that feature, one could further 
discuss if an implementation of the temporal controller with QGIS wasm 
would be an option. But it would require an investment in the qgis-js 
API/bindings and a client side implementation of the temporal 
controller with some web framework.


Best regards,
Andreas

On Wed, 5 Jun 2024 at 23:58, BJ Raval via QGIS-User 
 wrote:



Hi Andreas,
I am an occasional desktop QGIS user but this is my first time asking 
a question for help.
I would like to use the Temporal Controller on a web page served by 
QWC2 web client. Is it possible to use Temporal Controller by a user 
on the client side on the web browser?


A detailed answer of "how-to" would be much appreciated if this is 
possible.

Sincere thanks!
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Re: [Qgis-user] Temporal Controller on client side of QWC2

[Andreas Neumann via QGIS-User]

Hi BJ,

No - I don't think this is possible. But I am not fully up-to-date about
QWC2, as I am not an active user. You might want to ask at the separate
QWC2 user mailing list: https://lists.osgeo.org/mailman/listinfo/qgis-qwc2

Personally, I have doubts about the feasibility of integrating the temporal
controller with QGIS server and any web client that relies on raster
images. QGIS server is sending raster images of map extents. That approach
wouldn't scale very well, due to the additional lag between client and
server. To get an acceptable performance, it would mean that one would have
to exchange vector features (geometry and attributes) and render
client-side - and then you loose the QGIS symbology features ...

It might be more feasible to use QGIS wasm (web assembly) for this purpose.
But it is still a young project. In QGIS wasm, the QGIS rendering engine
runs inside the browser. It is also generating raster images, but it would
hold the original GIS data in the client and also render in the client,
eliminating the network lag between server and client. There you would
maintain the QGIS rendering and labeling capabilities.

If you have a serious interest in that feature, one could further discuss
if an implementation of the temporal controller with QGIS wasm would be an
option. But it would require an investment in the qgis-js API/bindings and
a client side implementation of the temporal controller with some web
framework.

Best regards,
Andreas

On Wed, 5 Jun 2024 at 23:58, BJ Raval via QGIS-User <
qgis-user@lists.osgeo.org> wrote:

> Hi Andreas,
> I am an occasional desktop QGIS user but this is my first time asking a
> question for help.
> I would like to use the Temporal Controller on a web page served by QWC2
> web client. Is it possible to use Temporal Controller by a user on the
> client side on the web browser?
>
> A detailed answer of "how-to" would be much appreciated if this is
> possible.
> Sincere thanks!
> BJ
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Re: [Qgis-user] Visualize object (pipe section) growth

[Andreas Neumann via QGIS-User]

Hi Jürgen,

Sure - just use the "Temporal Controller" (menu "View" --> "Panels" -->
"Temporal Controller"). See the QGIS manual section at
https://docs.qgis.org/3.34/en/docs/user_manual/map_views/map_view.html#maptimecontrol

Also have a look at the manual how to set up a layer to prepare it for the
"Temporal Controller":
https://docs.qgis.org/3.34/en/docs/user_manual/working_with_vector/vector_properties.html#temporal-properties

I am sure you will also find plenty of Youtube movies explaining how to set
up the "Temporal Controller" in QGIS.

Hope this helps,
Andreas

On Wed, 5 Jun 2024 at 12:55, Jürgen via QGIS-User 
wrote:

> Hi there,
> I'm new here and occasionally work with QGIS.
>
> In my case I would like to visualize the growth of water pipe sections
> over a certain period of time. This means that I have an inventory of pipe
> sections, each with the attribute of its Installation (date, for example
> 2023-02-11). The goal would now be a visualization in which the entire
> network is gradually built up, starting with the oldest line section.
>
> I have already exported individual pipe sections separately, but I then
> have to import them all by hand to make the increase visible. My question
> is whether there is a way in QGIS to build up the entire inventory
> gradually depending on the attribute values (date).
> I would be happy if someone could help me.
>
> Cheers Jürgen
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Re: [Qgis-user] traitement "nuage de points LIDAR"

[Andreas Neumann via QGIS-User]

Dear Georges,

Windows 7 is not supported anymore by QGIS. Windows 10 should still work,
but only in 64bit mode. We phased out the 32bit Windows version.

In general - to display and process point cloud data we recommend a recent
and fast machine with sufficient RAM. For 3D display a good graphics card
(OpenGL) is recommended.

Hope this helps,
Andreas



On Tue, 28 May 2024 at 12:27, Georges MARESCAUX via QGIS-User <
qgis-user@lists.osgeo.org> wrote:

> Hello,
>
> I own 2 “eMachines EL 1600” computers (Intel ® Atom ™ CPU 230 @1.60GHz )
> one with “Windows 7 home” operating system, the other with “Windows 10
> professional”.
>
> I can't install the latest versions of QGIS.
>
> Message displayed: "This installation package is not supported by this
> type of processor. Contact your reseller".
>
> However, I was able to install QGIS 3.18.3 Zürich, to which I added the
> “LAStools” extension.
>
> I wanted to use the “point cloud” files provided by the "
> https://geoservices.ign.fr/lidarhd"; site, named
> "LHD_FXX___PTS_C_LAMB92_IGN69.copc.laz", but they didn't seem to be
> taken into account when I added them (“Open Data Source Manager” -> “Point
> Cloud” -> "..." (Browse) -> “Add”.
>
> Are they not recognized by this version of QGIS? Is this a mistake on my
> part? Or are other extensions missing?
>
> Please do not hesitate to contact me should you require any further
> information. Thank you very much.
>
> Georges MARESCAUX
>
> Translated with DeepL.com (free version)
>
> Bonjour,
>
> je possède 2 ordinateurs “eMachines EL 1600” (Intel ® Atom ™ CPU 230
> @1.60GHz ) l'un avec le système d'exploitation “Windows 7 familiale”,
> l'autre avec “Windows 10 professionel”.
>
> Il m'est impossible d'installer les dernières versions de QGIS.
>
> Message affiché: "ce package d'installation n'est pas pris en charge par
> ce type de processeur. Contactez votre revendeur".
>
> Par contre j'ai pu installé la version QGIS 3.18.3 Zürich auquel j'ai
> installé l'extension “LAStools”.
>
> Voulant exploiter les fichiers “nuage de points” mis à disposition par le
> site "https://geoservices.ign.fr/lidarhd"; nommés sous la forme:
> "LHD_FXX___PTS_C_LAMB92_IGN69.copc.laz", ces derniers semblent ne
> pas être pris en compte au moment de les ajouter ("Ouvrir le Gestionnaire
> des sources de données" -> “Nuage de points” -> "..." (Parcourir) ->
> “Ajouter”.
>
> Ne sont-ils pas reconnus par cette version de QGIS? Est-ce une erreur de
> ma part? ou manque-t-il d'autres extensions?
>
> Me tenant à votre entière disposition pour toutes informations
> complémentaires et en vous remerciant, cordialement.
>
> Georges MARESCAUX
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Re: [Qgis-user] QGIS and weather data

[Andreas Neumann via QGIS-User]

Dear Saber,

This sounds like a very interesting workshop. Is this an online remote 
workshop or onsite somewhere in the UK? The information on the website 
doesn't clearly state that.


Thank you for the clarification,

Andreas

On 2024-05-14 09:27, Saber Razmjooei via QGIS-User wrote:


Dear QGIS users,

In recent years, we have added several features in QGIS to better 
handle weather data. There are also several organisations (NOAA, ECMWF, 
NASA, etc) that are publishing their data freely.


We are offering a 2-day workshop to discover the data and bring them in 
QGIS for analysis, interpretation and visualization:

https://thrivegeo.com/visualising-meteorological-data-with-qgis/

Users will get a QGIS certificate and a small part of the income goes 
to QGIS.org.


Kind regards
Saber

--

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www.lutraconsulting.co.uk [1]

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Re: [Qgis-user] Map Corner Coordinates

[Andreas Neumann via QGIS-User]

Hi Alanna,

It depends a bit on what you want to do.

There are map grids that you can use to label the edges of a map.

Or you can use a label with an expression. Here is one expression to 
help you get started:


with_variable(
'mapextent',
map_get(item_variables('Map1'),'map_extent'),
round(x_min(@mapextent)) || ' - ' || round(x_max(@mapextent))
)

This gets the map extent of the map with the ID "Map1" (you need to set 
the ID accordingly). Using the item_variables() data structure you can 
get hold of the first map and then query one or more of the attributes 
of a referenced item in a layout.


https://docs.qgis.org/3.34/en/docs/user_manual/expressions/functions_list.html#variables 
gives you a list of available variables - but it depends of the 
expression scope you are currently in.


Hope this helps you to get started.

Andreas

On 2024-04-15 12:13, Alanna Mitchell via QGIS-User wrote:


Dear QGIS community,

I am attempting to get the coordinate intersects of my map corners to 
display in Print Layout/Composer (i.e., N and W coordinates). The exact 
directions were: 'For geo-referencing purposes labelled coordinate 
intersects should be shown in all four corners of the map'. There does 
not seem to be an option for this in QGIS (I have found a few in ARC). 
I have found dynamic text in the Print Layout (Add Items - Add Dynamic 
Text - Map Properties) and one can see X minimum, X maximum, Y etc. I 
am not sure what these are or if they are relevant to me finding the 
map corner coordinates.


I also found the plugin Map Corner coordinates. But this seems to only 
work for the main map viewer, and I can't get this to align exactly 
with my Print Layout to ensure these coordinates are exactly the same.
If there was even a mathematically method, I would be more than partial 
to using that even. I appreciate any and all help in these matters. 
Thank you in advance.


Kind Regards,
Alanna
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Re: [Qgis-user] can't apply mask on labels

[Andreas Neumann via QGIS-User]

Hi Richard,

Is there a chance/way to increase the size limit from 200k to let's say 
1MB. Most Screenshots are  bigger than the 200k and it is really 
cumbersome, having to post images on some other platform in order to 
share it with the mailing list.


Do you know who at OSGeo I'd have to ask about this?

Thanks,

Andreas

On 2024-03-07 10:06, Richard Duivenvoorde via QGIS-User wrote:


Hi People,

FYI: current messages are too big for the mailing list. We have a max 
of 200KB per messages.


We manually let all message through which are larger.

When you answer, a large mail with a lot of images, please do not 
include the full answer mail.


That way the response will even be bigger, and be held by the mail list 
software (until one of the admins releases these mails)...


Thanks,

Richard Duivenvoorde

PS: even better: do not create html mails :-)  Keep your mails clean 
(text only) with optionally some attachments for images...


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Re: [Qgis-user] can't apply mask on labels

[Andreas Neumann via QGIS-User]

 Hi all,

The mask is more flexible and cartographically more pleasing if you don't
have a homogenous single-color background on your map. The mask is the only
way to get rid of darker colors while keeping light background colors.

See f.e. this example here:

https://s.geo.admin.ch/bb5itd6k85y7

Have a look at the large labels "Pfaffhausen", "Benglen", "Schwerzenbach"
and "Fällanden". Darker colors from roads (black) and rivers (blue) are
masked, but lighter colors from forests, lakes and hillshading are
preserved. The mask is the only way to achieve this "selective" effect of
masking.

All other options like background rectangles or buffers have a fixed color
and only work on a homogeneous background. They wouldn't be able to achieve
the effect of the example above.

I hope this clarifies the difference in the approaches?

The only major problems with the masks are the following limitations
(hopefully they can be removed in the future):
- they cannot be used within the same layer (you need to duplicate layers
if you want to mask features with labels from the same layer)
- they don't yet work on vector tiles, because vector tiles aren't real
QGIS vector layers with all the symbology options. They only have a limited
set of symbology so far

Greetings,
Andreas
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Re: [Qgis-user] QGIS Qt6 Wayland ongoing status

[Andreas Neumann via QGIS-User]

Hi Chris, Adam and others,

I am not the technical person to answer details, but I am on the QGIS 
PSC and can assure you that building QGIS on Qt6 is high up on our 
priority list (for at least a year or even longer). You can already 
build QGIS fine on Qt6 (for at least 2-3 versions now) but the core devs 
came across some blockers that had to be solved first, before we can 
bring this to the end users without major regressions:


 	* isues around qt3d and webengine compatibility (one could either use 
3D or the webengine, not both together)
 	* issues around the fact that Qt webengine cannot output HTML/web 
output to vectors when rendering to PDF

* PyQt6 bindings had to be done

While the first issue is already solved, the 2nd issue is currently 
being solved by introducing another library 
(https://github.com/JakubMelka/PDF4QT) and the third item is roughly 2/3 
done and still actively being worked on.


Then there is the issue that all QGIS plugins have to be migrated to 
PyQt6 ...


We will probably offer QGIS Qt6 builds as technology previews soon in 
parallel to the normal Qt5 builds.


Now - about wayland: all of this has really nothing to do with Wayland 
but has to be done anyway, because Qt5 isn't developed any further and 
QGIS.ORG already invested in Qt6 improvements from which we cannot yet 
take advantage of until we ship with Qt6.


Moving QGIS to Qt6 doesn't automatically mean that all QGIS wayland 
issues are solved - but probably quite a few of these issues.


Hope this clarifies the situation? If you want more detailed, more 
technical responses, I recommend discussions on the QGIS developers 
mailing list. It would only bore regular QGIS users ...


Greetings,

Andreas
QGIS.ORG treasurer and PSC member

I don't know if you have recently run QGIS on a Wayland desktop, but 
there is a stern message strongly suggesting reverting to X.


So as we seem to be marching away from X and ever forward to Wayland, I 
would like to start planning ahead a bit, and I would especially like 
to find some real information, as opposed to "I think this (but I 
really don't know)", or even worse, the people who can see a bright 
future for (let's say) Wayland-only desktops and aren't worried about 
the bumps on the road getting there.


Fortunately it seems Ubuntu 24.04 will continue to support X 
https://discourse.ubuntu.com/t/ubuntu-desktop-24-04-lts-roadmap-highlights/41032 
so in my case at least I know I can drop back to X if / as necessary 
for the immediate future.


There is some stuff on GitHub but it seems to be at least a year or 
two
old, talking about Qt6.0 and I gather we are at Qt6.6 by now.  Plus 
endless
short conversations in places like Reddit that throw off more heat 
than

light.


Updating to a new Qt version is likely going to be a lot of work, sot
imagine nobody is that keen on starting until there's really no 
choice.


As it happens, a search for qt6 in the QGIS repo on GitHub shows work 
being done on qt6, apparently for QGIS 4.  So maybe someone has started 
already?  I wonder how that's going?



Does anyone have any suggestions as to where to keep informed on this
topic?  Because it seems like Wayland is coming whether we want it or 
not...


Wayland has been around for many years at this point, and is already 
the

default on some Linux distributions, which have no problem running
QGIS.  There is so much legacy code that they are always going to have
compatibility modules to keep non-Wayland programs usable.  I wouldn't
worry about any programs suddenly breaking due to Wayland.


While I appreciate your attempts to reassure me, this isn't helping.

I'm aware from firsthand experience that Wayland has been around for 
many years at this point.  I have even used it on and off.  In fact 
it's my daily driver on my laptop.


My concern is learning how QGIS development might converge - or not - 
with a Wayland-only future, since it seems several important Linux 
distros are leaning away from supporting X to some degree or another.


As to whether QGIS might break under Wayland, there are 31 issues in 
the QGIS repo as of this evening related to Wayland in some form or the 
other.  Plus the warning I mentioned above.

--

Chris Hermansen · clhermansen "at" gmail "dot" com

C'est ma façon de parler.
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Re: [Qgis-user] QGIS attribute forms question

[Andreas Neumann via QGIS-User]

Dear Brent,

Hm - this is not what I observe. Normally you should be able to carry over
attribute widget definitions to other layers even if the attributes don't
fully match. It would assign those who match.

Are you talking about the "drag and drop" configuration mode (there are
three different form configuration modes).

I used this all the time when I was configuring more complex projects. I
never had issues when adding or removing columns.

If this doesn't work, it should be reported as a bug with data helping to
reproduce the issue.

I am sure this can be fixed.

Andreas


On Tue, 5 Dec 2023 at 04:35, Brent Wood via QGIS-User <
qgis-user@lists.osgeo.org> wrote:

> Hi,
>
> I have created some forms for data entry/edit using QGIS.
>
> I have successfully exported them & imported them to apply in different
> computers with QGIS.
>
> It can take several hours to create such a form where there are 80+
> columns in the underlying database table,
>
> I now have the situation where the underlying table needs columns added or
> removed.
>
> QGIS will not apply a saved form to a layer unless the structure is
> identical.
>
>
> How can I reuse a form for a layer representing a database table with
> (say) a single new column, by adding the new column to the form, rather
> than manually creating the whole form from scratch?
>
>
> Thanks
>
> Brent Wood
>
> Principal Technician, Fisheries
> NIWA
> DDI:  +64 (4) 3860529
> 
> Brent Wood
> Principal Technician - GIS and Spatial Data Management
> Programme Leader - Environmental Information Delivery
> +64-4-386-0529
>
> National Institute of Water & Atmospheric Research Ltd (NIWA)
> 301 Evans Bay Parade Hataitai Wellington New Zealand
> *Connect with NIWA:* niwa.co.nz  Facebook
>  LinkedIn
>  Twitter
>  Instagram
>  YouTube
>  To ensure
> compliance with legal requirements and to maintain cyber security
> standards, NIWA's IT systems are subject to ongoing monitoring, activity
> logging and auditing. This monitoring and auditing service may be provided
> by third parties. Such third parties can access information transmitted to,
> processed by and stored on NIWA's IT systems.
> Note: This email is intended solely for the use of the addressee and may
> contain information that is confidential or subject to legal professional
> privilege. If you receive this email in error please immediately notify the
> sender and delete the email.
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Re: [Qgis-user] Donation

[Andreas Neumann via QGIS-User]

Hi Ilkka,

I am sorry to hear about your download troubles! I replied you personally
(without the mailing list) with additional download instructions.

My guess is that you just did not wait long enough for the download. The
MSI installers on Windows are 1.2GB in size and that can take up to 30
minutes or longer to download. Please have a look at your browser's
download manager to see the download progress.

As a clarification: donations are really optional. The donation hint
appears after you initiated the download - and you can of course ignore
this, although donations are of course welcome (if you like QGIS). Esp. if
you are a new user: please try QGIS first if it is usefully for you and
only donate if you really find QGIS useful.

Best regards,
Andreas
(QGIS treasurer)

On Mon, 27 Nov 2023 at 18:32, Ilkka Haapalinna via QGIS-User <
qgis-user@lists.osgeo.org> wrote:

> Hi
> I am a bit (a lot) frustrated.
> Tried to download. It was impossible without donating.
> I did donation. I have a reciept of that.
> But could not download?
> I am really angry because of that kind of behavior.
> In the beginning, I got the impression that donation is not needed.
> However, as I could not do anything I did a small 10€ donation. But good
> bye money.
> NO download.
> This can be called moneypump!
> Ilkka Haapalinna
>
>
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Re: [Qgis-user] setting graduated symbology for a small postgres point table crashing qgis.

[Andreas Neumann via QGIS-User]

Hi Damien,

Can you submit a bug report please?

NULL values in the data shouldn't make QGIS freeze.

Thanks,
Andreas

On Wed, 11 Oct 2023 at 10:51, damien stephens via QGIS-User <
qgis-user@lists.osgeo.org> wrote:

> never mind I figured it out.
> the graduated engine does not like null values in the field, so i used a
> calulated field:
> case when field is null then .001 else field end
>
> On Wed, Oct 11, 2023 at 4:41 PM damien stephens 
> wrote:
>
>> Hi All.
>> I have a point table view with around 50,000 records and 160 fields in
>> postgres  which loads into qgis very quickly.
>> the problem comes when i try to assign a graduated symbology.
>> no matter which Mode i use - fixed interval, jenks etc, when i hit the
>> classify button qgis freezes  - and had been frozen for around an hour.
>> this has happened with 2 different views.
>> anyone else seen this / have a fix.
>> It could be a stupid mistake on my part as i am new to using Post gres,
>> as trialling  it vs the current mssql setup.
>> thanks in advance
>> Damien
>>
>>
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Re: [Qgis-user] Removal of overlap geometries within the same layer - merge to largest neighbor polygon

[Andreas Neumann via QGIS-User]

Hi Bernhard,

Ah - now I understand it - before feeding the polygons into the 
"Eliminate selected polygons" I should only select the overlapping ones 
detected by the Union (e.g. by using the "select by attribute" algorihm) 
- and not all polygons in the layer. Makes sense. The algorithm will 
then merge these subselects to their neighbours matching either largest 
or smalllest area or common boundary. Will give it a try.


Otherwise, the "eliminate selected polygons" sounds interesting in more 
"interactive", semi-automated workflow.


Thanks,

Andreas

On 2023-07-26 15:22, Bernhard Ströbl via QGIS-User wrote:


Hi Andreas,

I would like to give some explanations on your comment concerning the 
eliminate algorithm: During development the goal was to have a method 
that can get rid of sliver polygons (I explained my workflow for 
detecting them in my previous post). The algorithm simply merges the 
selected polygons with their specified neighbours. The attribute values 
of the neighbour stay as they are. What would you expect attributewise? 
Furthermore no definition of the polygons to eliminate is defined in 
the code thus it is up to the user to decide which polygons should go, 
hence it works on the selection. Making a tool that merely eliminates 
all overlaps would be a different task. The eliminate tool as it is has 
a broader use range, examples: You can only eliminate certain overlaps 
while keeping others. You can use it to generalize by getting rid of 
polygons smaller than a certain size. You have landuse data that 
contains polygons for a river but you want to use lines for the river, 
so get rid of all river polygons....


regards

Bernhard

Andreas Neumann via QGIS-User  hat am 
26.07.2023 14:15 CEST geschrieben:


Hi,

Thank you all for your feedback!

@Nyall - the GEOS/JTS capabilities for cleaning and validating 
geometries

look definitely interesting. Something for an upcoming QGIS-CH grant
perhaps ...

@Bernhard - I also had a look at and tested the "Eliminate selected
polygons" algorithm - but it doesn't have a way to specify attribute
handling nor grouping - and it is also strange that I have to select 
the

polygons first and cannot run the algorithm on the whole data set as is

About SAGA: I couldn't get the SAGA stuff to work anymore
About GRASS: it could be an option, but a native solution in QGIS would 
be

preferred

So in summary: there are several options around for cleaning overlaps - 
but
it isn't as straight-forward and user friendly yet as it could/should 
be.


I haven't looked at the gaps yet ...

Thank you all and greetings,
Andreas

On Tue, 25 Jul 2023 at 13:13, Bernhard Ströbl via QGIS-User <
qgis-user@lists.osgeo.org> wrote:

Hi Andreas,

the Algorithm "Eliminate selected polygons" was originally created to
address these questions. I usually imported the data into GRASS ran a 
clean

there and reexported the results into a non topolgical dataset. Thus
overlapping areas and gaps (only if closed) are identified and can be
eliminated using the algorithm named above (selecting only a certain
area-circumference relation) by merging it with the adjacent polygon 
with

the smallest/largest area or the longest common boundary.
For your case you could have used this algorithm after the union to
identify overlaps.
As for an algorithm that does all this in one go: You would need 
something
that detects holes between polygons without the help of a toplogical 
data

format.

regards
Bernhard

Andreas Neumann via QGIS-User  hat am 
25.07.2023 12:01 CEST geschrieben:


Hi,

A friend of mine has a dirty input data set with lots of overlapping
geometries (within the same layer) and asked me if there is a tool
within QGIS to automatically remove the overlaps and assign the
overlapping area to the neighbor polygon with the largest area.

The solution was surprisingly hard to find, although I am pretty sure
there are multiple combinations of algorithms that would solve the
problem. Here is the solution I came up with:
https://github.com/qgis-ch/overlap_removal/tree/main [1]- perhaps you
have better ideas - more elegant solutions?

Wouldn't it be great if QGIS had a processing tool to solve this 
overlap

cleaning within the same layer "out of the box" without having to use a
graphical model or a more or less complicated sequence of algorithms in
the processing toolbox? Apparently, ArcGIS has such a tool ...

Saga and GRASS also might have such tools - but I couldn't get the SAGA
based QGIS plugin "Dissect and dissolve overlaps"
(https://plugins.qgis.org/plugins/dissect_dissolve_overlaps).

The same problem exists for automatically filling small gaps in the
polygon data set ...

Andreas

Links:
--
[1] 
https://github.com/qgis-ch/overlap_removal/tree/main___ 
QGIS-User mailing list

QGIS-User@lists.osgeo.org
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Re: [Qgis-user] Removal of overlap geometries within the same layer - merge to largest neighbor polygon

[Andreas Neumann via QGIS-User]

Hi,

Thank you all for your feedback!

@Nyall - the GEOS/JTS capabilities for cleaning and validating geometries
look definitely interesting. Something for an upcoming QGIS-CH grant
perhaps ...

@Bernhard - I also had a look at and tested the "Eliminate selected
polygons" algorithm - but it doesn't have a way to specify attribute
handling nor grouping - and it is also strange that I have to select the
polygons first and cannot run the algorithm on the whole data set as is

About SAGA: I couldn't get the SAGA stuff to work anymore
About GRASS: it could be an option, but a native solution in QGIS would be
preferred

So in summary: there are several options around for cleaning overlaps - but
it isn't as straight-forward and user friendly yet as it could/should be.

I haven't looked at the gaps yet ...

Thank you all and greetings,
Andreas


On Tue, 25 Jul 2023 at 13:13, Bernhard Ströbl via QGIS-User <
qgis-user@lists.osgeo.org> wrote:

> Hi Andreas,
>
> the Algorithm "Eliminate selected polygons" was originally created to
> address these questions. I usually imported the data into GRASS ran a clean
> there and reexported the results into a non topolgical dataset. Thus
> overlapping areas and gaps (only if closed) are identified and can be
> eliminated using the algorithm named above (selecting only a certain
> area-circumference relation) by merging it with the adjacent polygon with
> the smallest/largest area or the longest common boundary.
> For your case you could have used this algorithm after the union to
> identify overlaps.
> As for an algorithm that does all this in one go: You would need something
> that detects holes between polygons without the help of a toplogical data
> format.
>
> regards
> Bernhard
>
> > Andreas Neumann via QGIS-User  hat am
> 25.07.2023 12:01 CEST geschrieben:
> >
> >
> > Hi,
> >
> > A friend of mine has a dirty input data set with lots of overlapping
> > geometries (within the same layer) and asked me if there is a tool
> > within QGIS to automatically remove the overlaps and assign the
> > overlapping area to the neighbor polygon with the largest area.
> >
> > The solution was surprisingly hard to find, although I am pretty sure
> > there are multiple combinations of algorithms that would solve the
> > problem. Here is the solution I came up with:
> > https://github.com/qgis-ch/overlap_removal/tree/main [1]- perhaps you
> > have better ideas - more elegant solutions?
> >
> > Wouldn't it be great if QGIS had a processing tool to solve this overlap
> > cleaning within the same layer "out of the box" without having to use a
> > graphical model or a more or less complicated sequence of algorithms in
> > the processing toolbox? Apparently, ArcGIS has such a tool ...
> >
> > Saga and GRASS also might have such tools - but I couldn't get the SAGA
> > based QGIS plugin "Dissect and dissolve overlaps"
> > (https://plugins.qgis.org/plugins/dissect_dissolve_overlaps).
> >
> > The same problem exists for automatically filling small gaps in the
> > polygon data set ...
> >
> > Andreas
> >
> >
> >
> > Links:
> > --
> > [1]
> https://github.com/qgis-ch/overlap_removal/tree/main___
> > 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] Removal of overlap geometries within the same layer - merge to largest neighbor polygon

[Andreas Neumann via QGIS-User]

Hi,

A friend of mine has a dirty input data set with lots of overlapping 
geometries (within the same layer) and asked me if there is a tool 
within QGIS to automatically remove the overlaps and assign the 
overlapping area to the neighbor polygon with the largest area.


The solution was surprisingly hard to find, although I am pretty sure 
there are multiple combinations of algorithms that would solve the 
problem. Here is the solution I came up with: 
https://github.com/qgis-ch/overlap_removal/tree/main [1]- perhaps you 
have better ideas - more elegant solutions?


Wouldn't it be great if QGIS had a processing tool to solve this overlap 
cleaning within the same layer "out of the box" without having to use a 
graphical model or a more or less complicated sequence of algorithms in 
the processing toolbox? Apparently, ArcGIS has such a tool ...


Saga and GRASS also might have such tools - but I couldn't get the SAGA 
based QGIS plugin "Dissect and dissolve overlaps" 
(https://plugins.qgis.org/plugins/dissect_dissolve_overlaps).


The same problem exists for automatically filling small gaps in the 
polygon data set ...


Andreas



Links:
--
[1] https://github.com/qgis-ch/overlap_removal/tree/main___
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Re: [Qgis-user] Sicherheitslücke [ CVE-2023-36664 ] Ghostscript in Qgis?

[Andreas Neumann via QGIS-User]

Dear Ronny,

I am adding the mailing list again.

Jürgen Fischer (the packager for Windows and Ubuntu) informed you that 
OSGeo4W is already patched: 
https://lists.osgeo.org/pipermail/qgis-user/2023-July/053215.html


And also that ghostscript isn't necessary for QGIS, but a dependency of 
GRASS. You could install QGIS with the OSGeo4W network installer and not 
select GRASS. Then you wouldn't get ghostscript. But if you do want 
GRASS you can now use the patched ghostscript version.


If you need a patched .msi or standalone installer you can get one after 
the next planned release - see 
https://www.qgis.org/en/site/getinvolved/development/roadmap.html#roadmap


Hope this clarifies the situation enough?

Greetings,

Andreas

On 2023-07-20 07:21, Ronny Kerlin wrote:


Please excuse my bad English.

Hello and sorry for the insufficient information, that was not 
intentional. I use the LTR version QGis 3.28.4 Firenze under Windows10 
22H2. Download source  
https://www.qgis.org/de/site/forusers/download.html# [1]


With this installation, Ghostscript libraries are also copied to the 
corresponding directory


C:\Program Files\QGIS 3.28.4\bin\gsdll64.dll

C:\Program Files\QGIS 3.28.4\bin\gswin32c.exe

C:\Program Files\QGIS 3.28.4\bin\gswin64c.exe

The Ghostscript libraries used here are older (GPL Ghostscript 9.55.0) 
and are therefore probably also affected by the Ghostscript 
vulnerability.


https://www.kroll.com/en/insights/publications/cyber/ghostscript-cve-2023-36664-remote-code-execution-vulnerability

„Applications may leverage Ghostscript without it being obvious. It is 
recommended that applications that have the ability to render PDF or 
EPS files are checked for Ghostscript usage and updated as patches 
become available from the vendor."


So the question was who do I contact to find out if the QGis version is 
vulnerable to such manipulated .eps , .ps or QGis project files files?


Thank you for your help and greetings from Germany

Ronny

###

Entschuldige bitte mein schlechtes Englisch.

Hallo und sorry für die unzureichenden Angaben, das war keine Absicht.

Ich nutze die LTR Version QGis 3.28.4 Firenze unter Windows10 22H2. 
Downloadquelle  https://www.qgis.org/de/site/forusers/download.html#


Mit dieser Installation werden auch Ghostscript Bibliotheken im 
entsprechenden Verzeichnis kopiert


C:\Program Files\QGIS 3.28.4\bin\gsdll64.dll
C:\Program Files\QGIS 3.28.4\bin\gswin32c.exe
C:\Program Files\QGIS 3.28.4\bin\gswin64c.exe

Die hierbei verwendeten Ghostscript Bibliotheken sind älter( GPL 
Ghostscript 9.55.0 ) und somit wohl auch von der Ghostsript 
Schwachstellebetroffen.


https://www.kroll.com/en/insights/publications/cyber/ghostscript-cve-2023-36664-remote-code-execution-vulnerability 
„Applications may leverage Ghostscript without it beingobvious. It is 
recommended that applications that have the ability to renderPDF or EPS 
files are checked for Ghostscript usage and updated as patchesbecome 
available from the vendor."


Daher war die Frage, an wen muss ich mich wenden, um herauszubekommen 
ob die QGis Version anfällig für solche manipulierten .eps oder .ps 
oder QGis Projektdateien Dateien ist?


Vielen Dank für eure Hilfe und Grüße aus Deutschland

Ronny

Am Mi., 19. Juli 2023 um 13:57 Uhr schrieb Andreas Neumann 
:


Hi Ronny,

What operating system are your refering to? QGIS on Windows? Mac? 
Linux?


QGIS doesn't use ghostscript and doesn't install ghostscript.

But you might have installed ghostscript through OSGeo4W. If there is 
anything to patch, then it is in OSGeo4W and the various Linux and 
MacOS distributions.


How did you install QGIS? Through the OSGeo4W installer or with the 
standalone installer or .msi installer?


Greetings,

Andreas

On 2023-07-19 13:21, Ronny Kerlin via QGIS-User wrote:

Hello QGI's team,

We have an important question regarding a recent vulnerability [ 
CVE-2023-36664 ] affecting Ghostscript


https://www.kroll.com/en/insights/publications/cyber/ghostscript-cve-2023-36664-remote-code-execution-vulnerability

https://www.heise.de/news/Codeschmuggel-Luecke-in-Ghostscript-betreff-LibreOffice-und-mehr-9215627.html
https://www.borncity.com/blog/2023/07/13/critical-rce-vulnerability-cve-2023-36664-in-ghostscript-endangered-systems/

There are also corresponding GS libraries in #QGIS 3.28.4.

Now how can I fix the above vulnerability or is there no concern for 
QGis?


Thank you in advance for your efforts.
Best regards

Ronny

## Hallo QGIs Team,

wir haben ein wichtige Frage zu einer aktuellen Sicherheitslücke [ 
CVE-2023-36664 ], die im Zusammenhang mit Ghostscript auftritt


https://www.kroll.com/en/insights/publications/cyber/ghostscript-cve-2023-36664-remote-code-execution-vulnerability

https://www.heise.de/news/Codeschmuggel-Luecke-in-Ghostscript-betrifft-LibreOffice-und-mehr-9215627.html
https://www.borncity.com/blog/2023/07/13/kritische-rce-schwachstelle-cve-2023-36664-in-ghostscript-bedroht-systeme/

In der #QGIS 3.28.4 gibt 

Re: [Qgis-user] Sicherheitslücke [ CVE-2023-36664 ] Ghostscript in Qgis?

[Andreas Neumann via QGIS-User]

Hi Jürgen,

Thanks for clarifying the situation. And for patching OSGeo4W quickly!

On my Windows system it wasn't installed, because we didn't install GRASS.

Greetings,
Andreas

On Wed, 19 Jul 2023 at 14:17, Jürgen E. Fischer via QGIS-User <
qgis-user@lists.osgeo.org> wrote:

> Hi Andreas,
>
> On Wed, 19. Jul 2023 at 13:57:21 +0200, Andreas Neumann via QGIS-User
> wrote:
> > How did you install QGIS? Through the OSGeo4W installer or with the
> > standalone installer or .msi installer?
>
> Both contain ghostscript as dependency of GRASS.   OSGeo4W was updated to
> 10.01.2.
>
>
> Jürgen
>
> --
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Re: [Qgis-user] Sicherheitslücke [ CVE-2023-36664 ] Ghostscript in Qgis?

[Andreas Neumann via QGIS-User]

Hi Ronny,

What operating system are your refering to? QGIS on Windows? Mac? Linux?

QGIS doesn't use ghostscript and doesn't install ghostscript.

But you might have installed ghostscript through OSGeo4W. If there is 
anything to patch, then it is in OSGeo4W and the various Linux and MacOS 
distributions.


How did you install QGIS? Through the OSGeo4W installer or with the 
standalone installer or .msi installer?


Greetings,

Andreas

On 2023-07-19 13:21, Ronny Kerlin via QGIS-User wrote:


Hello QGI's team,

We have an important question regarding a recent vulnerability [ 
CVE-2023-36664 ] affecting Ghostscript


https://www.kroll.com/en/insights/publications/cyber/ghostscript-cve-2023-36664-remote-code-execution-vulnerability

https://www.heise.de/news/Codeschmuggel-Luecke-in-Ghostscript-betreff-LibreOffice-und-mehr-9215627.html
https://www.borncity.com/blog/2023/07/13/critical-rce-vulnerability-cve-2023-36664-in-ghostscript-endangered-systems/

There are also corresponding GS libraries in #QGIS 3.28.4.

Now how can I fix the above vulnerability or is there no concern for 
QGis?


Thank you in advance for your efforts.
Best regards

Ronny

## Hallo QGIs Team,

wir haben ein wichtige Frage zu einer aktuellen Sicherheitslücke [ 
CVE-2023-36664 ], die im Zusammenhang mit Ghostscript auftritt


https://www.kroll.com/en/insights/publications/cyber/ghostscript-cve-2023-36664-remote-code-execution-vulnerability

https://www.heise.de/news/Codeschmuggel-Luecke-in-Ghostscript-betrifft-LibreOffice-und-mehr-9215627.html
https://www.borncity.com/blog/2023/07/13/kritische-rce-schwachstelle-cve-2023-36664-in-ghostscript-bedroht-systeme/

In der #QGIS 3.28.4 gibt es auch entsprechende GS Bibliotheken.

Wie kann ich jetzt die oben genannte Sicherheitslücke schließen oder 
gibt es für QGis keine Bedenken?


Vielen Dank im Voraus für eure Bemühungen.

Viele Grüße

Ronny

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Re: [Qgis-user] QGIS layer properties window oversized

[Andreas Neumann via QGIS-User]

Hi John,

Can you let us know what your screen resolution you have on your laptop or
PC screen?

QGIS requires a certain minimum resolution. I don't know exactly, but
anything below 1280x1024 or so is barely usable.

Andreas

On Thu, 13 Jul 2023 at 13:48, John Studley via QGIS-User <
qgis-user@lists.osgeo.org> wrote:

> Can anyone help
>
> With QGIS 3.28.8-1 the layer properties window is oversized and so i
> cannot edit and save points lines or polygons
>
> Regards
>
> John
>
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Re: [Qgis-user] how to export label background boxes

[Andreas Neumann via QGIS-User]

Hi,

Sorry - my link was wrong. One shouldn't write emails in parallel ...

I wanted to point to
https://qgis.org/en/site/forusers/visualchangelog324/index.html#feature-extract-labels-algorithm

Too bad to hear that it crashes QGIS. Please write a bug report including
some sample data so it can be reproduced.

Thank you,
Andreas

On Fri, 3 Mar 2023 at 11:35,  wrote:

> Hi Andreas,
>
> thank you for your message. „Label export“ sounds good, but I could not
> find it in 3.28. I searched the Processing Toolbox (PT) for „Label“ and for
> „export“ but had no luck.
>
> What I found in PT is „Extract labels“, but that crashed QGIS immediately
> the hard way.
> Your github leads me to Fix #51543 and make big forms more fluid by
> reducing calls to updateFieldDependencies #51836
>
> I am not sure what the connection to the labels is??
>
>
>
> I need those background boxes absolutely because that is what my customer
> wants to receive the data in.
>
>
>
> Best regards, Uwe
>
>
>
> *Von:* Andreas Neumann 
> *Gesendet:* Freitag, 3. März 2023 08:15
> *An:* gisfi...@t-online.de
> *Cc:* qgis-user 
> *Betreff:* Re: [Qgis-user] how to export label background boxes
>
>
>
> Hi Uwe,
>
>
>
> This might only be part of the solution - but starting from QGIS 3.24
> there is a "label export" processing tool that exports the automatically
> placed labels to a data set containing the label parameters. I haven't
> checked though, if it also exports label backgrounds?
>
>
>
> See https://github.com/qgis/QGIS/pull/51836
>
>
>
> If it misses the export of the background - perhaps that can be added to
> that processing algorithm.You can either fix it yourself or ask a
> commercial support provider.
>
>
>
> But may I ask why you need these label backgrounds? Are you aware that
> QGIS has advanced masking available? Search for "selective masking" in
> QGIS. Label backgrounds in one layer can act as masks in other symbol
> layers.
>
>
>
> Greetings,
>
> Andreas
>
>
>
> On Wed, 1 Mar 2023 at 09:51, Uwe via QGIS-User 
> wrote:
>
> Hello list,
>
>
>
> does anybody know if there is a way to convert/export the QGIS label
> background graphics (eg boxes or ellipses) to shapes?
>
> For those who know ArcMap: what I need is what ArcMap creates when
> Annotation features are written to Shape format, that means: boxes
> surrounding their text strings like an envelope.
>
>
>
> Thanks and happy day, U.
>
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Re: [Qgis-user] how to export label background boxes

[Andreas Neumann via QGIS-User]

Hi Uwe,

This might only be part of the solution - but starting from QGIS 3.24 there
is a "label export" processing tool that exports the automatically placed
labels to a data set containing the label parameters. I haven't checked
though, if it also exports label backgrounds?

See https://github.com/qgis/QGIS/pull/51836

If it misses the export of the background - perhaps that can be added to
that processing algorithm.You can either fix it yourself or ask a
commercial support provider.

But may I ask why you need these label backgrounds? Are you aware that QGIS
has advanced masking available? Search for "selective masking" in QGIS.
Label backgrounds in one layer can act as masks in other symbol layers.

Greetings,
Andreas

On Wed, 1 Mar 2023 at 09:51, Uwe via QGIS-User 
wrote:

> Hello list,
>
>
>
> does anybody know if there is a way to convert/export the QGIS label
> background graphics (eg boxes or ellipses) to shapes?
>
> For those who know ArcMap: what I need is what ArcMap creates when
> Annotation features are written to Shape format, that means: boxes
> surrounding their text strings like an envelope.
>
>
>
> Thanks and happy day, U.
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Re: [Qgis-user] problem with cartographic label placement

[Andreas Neumann via QGIS-User]

Hi Uwe,

I just tried it. 'B,BR' worked for me. Just don't use quotes before and
after the separator.

Greetings,
Andreas


On Thu, 12 Jan 2023 at 22:02, Uwe via QGIS-User 
wrote:

> Hello list,
>
>
>
> for cartographic label placement, according to the help docs it should be
> possible to define position priorities in a ranking.
>
> But when I open the editor and enter a comma separated list like:
>
>
>
> ‘B‘ , ‘BR‘
>
>
>
> I get an error message. Entering just one value it works. But that doesn’t
> make sense because I need at least two values to let the label move when it
> collides with a feature.
>
> What can be wrong with my input? I use 3.28.
>
>
>
> Thanks a lot for help.
>
>
>
> Uwe
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Re: [Qgis-user] Service Ticket #353317 - GIS work on VPN - Archae-Aus

[Andreas Neumann via QGIS-User]

Hi Virag,

This depends a bit on the data sources used in the project (files vs 
databases vs web services).


But in general, VPN connections with a high latency are not recommended 
and will result in really bad user experience. QGIS does a lot if I/O 
when opening layers and working with databases. A low latency in your 
network is crucial for having a good user experience.


If you run into such issues, I recommend using a remote desktop solution 
(such as RDP, Citrix) and make sure that the QGIS desktop application 
runs in the same local network like your database / data source - so 
that the latency between QGIS desktop and your data sources is 
minimized.


BTW: other GIS will have the same issue. For example ESRI ArcGIS desktop 
wouldn't perform well in such a situation.


Greetings,

Andreas

On 2023-01-12 03:25, Virag Gandhi via QGIS-User wrote:


Hi Team,

We have a client who has been using QGIS application on VPN and finding 
slowness very running the same application on VPN, can you please 
advise how to do we contact your technical team to get further support 
on this and find out if it is recommended to run application on VPN or 
not?


Please do not hesitate to contact me with the further queries.

Virag Gandhi
Senior IT Support Engineer

MOBILE +61 452 585 311

PHONE +61 8 9335 5779

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Re: [Qgis-user] Labeling with subscript

[Andreas Neumann via QGIS-User]

Very nice!

Andreas

On 2023-01-05 16:51, Andrea Giudiceandrea via QGIS-User wrote:


Bodamer, Christian
_Thu Jan 5 05:32:24 PST 2023_



-
I like to label with two columns. The secound column sholud be 
subscript.


Hi Christian,
AFAIK the super and subscript support for text renderer has been 
already added to QGIS 3.29-master and will be available in QGIS 3.30 
[1].


Best regards.

Andrea Giudiceandrea

[1] https://github.com/qgis/QGIS/pull/50848
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Re: [Qgis-user] Labeling with subscript

[Andreas Neumann via QGIS-User]

Hi Christian,

You probably don't do anything wrong. It is just not supported (yet).

Here is the subset of HTML that should work:

 	* font-color 
(https://www.qgis.org/en/site/forusers/visualchangelog314/index.html#feature-respect-html-colors-in-labels)
 	* font-familiy 
(https://www.qgis.org/en/site/forusers/visualchangelog328/index.html#feature-add-support-for-html-bold-italic-font-size-and-font-family-to-labelling 
)

* font-size
* bold
* italic

This is a really small subset of HTML that is supported until now, 
because many HTML formatting options have an impact on text geometries 
and need to be taken into account in the label engine (e.g for overlap 
tests, etc.)


If you need this implemented, please ask a developer for a quote to get 
it implemented. Nyall Dawson (https://north-road.com/) did most of the 
work here. He could be asked.


Hope this helps,

Andreas

On 2023-01-05 14:32, Bodamer, Christian via QGIS-User wrote:


Hello list,

wish you a happy NEW YEAR!

I like to label with two columns. The secound column sholud be 
subscript. I activate HTML Formating and use the following code in the 
Value field:


format(

'%1 Sub%2',

"column1" ,

"column2"

)

The text of column2 is displayed but not subscript. Also %2 
doesn't work.


Changing the color with style="color:red" works. I don't see the 
mistake.


Does someone has an idea?

Christian

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Re: [Qgis-user] problem with modification of vertex

[Andreas Neumann via Qgis-user]

Hi,

Vertex editing changed between version 2.x and 3.x. You don't drag a 
vertex anymore in QGIS 3.x. You have to click in order to pick up the 
vertex then move the mouse and klick again.


This change was introduced in order to allow for keyboard entries during 
editing.


See also 
https://docs.qgis.org/testing/en/docs/user_manual/working_with_vector/editing_geometry_attributes.html#vertex-tool


Greetings,

Andreas

On 2022-11-29 13:58, Maifredi GV via Qgis-user wrote:


Hallo,
I have a problem with modification of vertex in Qgis Firenze 3.28.1 and 
older version ( madeira 3.4).

With the old Pisa 2.10 it works.

I have a mac book pro with M1 processor and IOS Ventura

The problem is:

I can design poligons, but if I want modify vertex it is impossible.

I can trace a polygon.

When I go on vertex appear a ring blu, but is impossible to pik up the 
vertex and drag it.
If I try to modify the snap option like 20, 20 and not 12,0 that is the 
default value, it show an error message: Impossibile salvare ' * SR 
generato (+proj=merc +lon_0=0 +lat_ts=0 +x_0=0 +y_0=0 +a=6378137 
+b=6378137 +units=m +no_defs)' -- questa definizione di stringa Proj è 
equivalente a ESRI:54004.


Prova invece a modificare la definizione SR in un formato WKT.

For me it is a big bib problem.

On PC the same file works.

Thanks for you help.

Alessandro

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Re: [Qgis-user] Update Atrributes with one Click

[Andreas Neumann via Qgis-user]

Hi Roland,

In general I see the following three options:

1. SQL (perhaps the most efficient one if you have strict rules)

2. Processing Model: you could create a processing model for selection and
updating of features with attributes.

3. Interactive update with QGIS tools: For interactive update: you could
select features based on expressions (select by expression tool) and then
use the multi-update feature of QGIS described at
https://docs.qgis.org/3.22/en/docs/user_manual/working_with_vector/attribute_table.html#multi-edit-fields

Of course you would have to do the homework to define the rules for
selections (also based on multiple tables) and updates - for either of  the
above methods.

Hope this helps to get started ...

Greetings,
Andreas

On Wed, 9 Nov 2022 at 09:49, Roland Spielhofer via Qgis-user <
qgis-user@lists.osgeo.org> wrote:

> Hi,
> I have to manually check a large points dataset for errors and if I find
> one, I update three attributes (always the same 3, one set to 1, two set to
> 0) of the point.
> Is there a quick way to automat this updating?
> Currently I click with Identify features on the point feature, right click
> in the identify results panel and select "Edit feature form" and manually
> type in the values at the attributes.
> Selecting multiple points and update simultaneously does not work, as I
> have to check attributes of another layer before I can decide if the
> points' attributes need an update.
>
> Any help appreciated!
>
> Regards,
> Roland
>
>
>
>
>
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Re: [Qgis-user] New crowdfunding campaign: point clouds and 3D improvements in QGIS

[Andreas Neumann via Qgis-user]

Hi Saber,

Very good. Hopefully it will be another successful campaign.

A question on the export of the profile: CSV and DXF is mentioned. Wouldn't
it also make sense to add SVG export, so the profile could be exported to
Inkscape/Illustrator? I know, it is already possible to export a layout to
SVG (and with the new enhancement, the profile can then be part of a
layout), but it would be convenient, being able to export to SVG without
having to create a layout first. Not sure, how much effort this would mean?

I will help to spread the word!

Andreas

On Mon, 26 Sept 2022 at 17:43, Saber Razmjooei via Qgis-user <
qgis-user@lists.osgeo.org> wrote:

> Dear all,
>
> As you know, in the past couple of years, we (Lutra, North Road and
> https://hobu.co/) added support point clouds and developed several new 3D
> features to QGIS (e.g. Profile tool).
>
> For the next round of crowdfunding, after feedback by several user groups
> and organizations, we decided to bring processing of point clouds to QGIS.
> In addition, there will be several enhancements to the profile tool and 3D
> maps. For more information, see:
> https://www.lutraconsulting.co.uk/crowdfunding/pointcloud-processing-qgis/
>
> Your help is needed to make this happen. Please support our crowdfunding
> campaign by filling out the pledge form. If you are from a larger
> organisation and require extra information to contribute to the campaign,
> please contact me.
>
> Kind regards
> Saber
>
> --
> Saber Razmjooei
> www.lutraconsulting.co.uk
>
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Re: [Qgis-user] Issue with drawing order of layers

[Andreas Neumann via Qgis-user]

Hi Roland,

This is an "advanced" option - that's why the panel is turned off by 
default.


This separate "layer order" panel allows you to separate logical 
grouping from layer drawing order. In Cartography you often draw points 
over lines over polygons in certain orders, but the logical grouping in 
the layer tree might be something totally different from the layer 
drawing order.


Hope this explains why the two panels exist and why the other panel is 
turned off by default.


I assume, the fact that the checkbox was enabled was "pure accident" - 
if you don't know that panel.


Andreas

On 2022-06-29 14:54, Roland Spielhofer wrote:


Hi Andreas,
thanks!
That was the problem!
The override check box in the layer order panel was enabled for some 
reason - ticking it of solved the problem.

Strangely I had to activate the panel first, never seen it before...
Anyway, layers are shown now as expected.

Thanks again and best regards,
Rolnad

Gesendet: Mittwoch, 29. Juni 2022 um 14:28 Uhr
Von: "Andreas Neumann" 
An: "Roland Spielhofer" 
Cc: "qgis-user" 
Betreff: Re: [Qgis-user] Issue with drawing order of layers

Hi Roland,

There is a separate panel called "Layer Order" ("Layerreihenfolge" in 
German) which can override the order from the layer tree.


Perhaps you/or someone else - accidentally enabled that panel and 
ticked the checkbox that it overrides the layer drawing order.


Hope this helps,

Andreas

On 2022-06-29 14:20, Roland Spielhofer via Qgis-user wrote:


Hi,
I have a project with several (~50) layers, some of them organised in 
groups, some not.
Since today, I have an issue with the drawing order - e.g. layers that 
are below others cover layers that are "higher" in the layer list.
A basemap layer from the bottom of the list e.g. covers now all other 
layers more on top.

But this is the case for other layers as well.
I've put three layers into a new project and there the rendering order 
is fine.

Comparison example here:

https://imgur.com/a/WOPrLRb

On the left the new project how it should be - on the right the 
project with the issues.
The colorful points are the top most layer, but on the right they are 
covered by the grayscale raster image. Ticking off the raster layer 
shows the points again (so I know they are there).


Any thoughts why this could be? It's QGIS 3.24.0 for some time now, no 
version change. The problem is new by today.

I didn't find any settings to influence the drawing order.

Regards,
Roland

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Re: [Qgis-user] Issue with drawing order of layers

[Andreas Neumann via Qgis-user]

Hi Roland,

There is a separate panel called "Layer Order" ("Layerreihenfolge" in 
German) which can override the order from the layer tree.


Perhaps you/or someone else - accidentally enabled that panel and ticked 
the checkbox that it overrides the layer drawing order.


Hope this helps,

Andreas

On 2022-06-29 14:20, Roland Spielhofer via Qgis-user wrote:


Hi,
I have a project with several (~50) layers, some of them organised in 
groups, some not.
Since today, I have an issue with the drawing order - e.g. layers that 
are below others cover layers that are "higher" in the layer list.
A basemap layer from the bottom of the list e.g. covers now all other 
layers more on top.

But this is the case for other layers as well.
I've put three layers into a new project and there the rendering order 
is fine.

Comparison example here:

https://imgur.com/a/WOPrLRb

On the left the new project how it should be - on the right the project 
with the issues.
The colorful points are the top most layer, but on the right they are 
covered by the grayscale raster image. Ticking off the raster layer 
shows the points again (so I know they are there).


Any thoughts why this could be? It's QGIS 3.24.0 for some time now, no 
version change. The problem is new by today.

I didn't find any settings to influence the drawing order.

Regards,
Roland

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Re: [Qgis-user] "Merged Features" for label

[Andreas Neumann via Qgis-user]

Hi Andrea,

This exists for adjacent LineString geometries already, but as far as I 
know not for polygons.


See "Rendering" section of the label settings and the option "Merge 
connected lines to avoid duplicate labels".


It would probably be possible to add this for polygons as well if 
someone invests into this.


Greetings,

Andreas

On 2022-06-14 09:49, Andrea Giraldi via Qgis-user wrote:

I've appreciated the "Merged Features" renderer introduced in Layer 
Styling since 3.22 (or maybe sooner).
My question is ifanyeone can suggest a way for a similar Merged 
Features style for labeling: only one label for any group of adjacent 
polygons with the same attribute in a field, without the necessity of 
dissolving the layer.

Thank you!

__
Andrea Giraldi

A r c h i t e t t o
Phd progettazione urbanistica e territoriale
via Scirocco 2 Pistoia
cell 3490575904
__

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Re: [Qgis-user] [QGIS-Developer] QGIS 508 / EEN 301 549 Accessibility Documentation - VPAT/WCAG

[Andreas Neumann via Qgis-user]

Dear Thomas,

The QGIS community and PSC would certainly welcome such an initiative.
However, no-one on the PSC/board is based in the US.

Is that something that has to be renewed for every release? Perhaps it
would be done only for LTR versions?

If you know a university institute based in the US that could work on this,
please put us in touch !

Also: what would / should happen in your opinion if the work on the
conformance document would reveal major issues with QGIS in the
accessibility respect? We are largely dependent on upstream libraries
(mainly Qt in our example) - so we are basically inheriting all of the
strengths and weaknesses of Qt ...

Also, it might be worth a discussion with the US QGIS user group - such
conformance documents are typically only valid in one single country - so
it would be kind of the responsibility of a local user group to work on
such documents. Of course the international project can support this effort
- but the initiative should primarily come from the country user group that
wants to get such a conformance document for their country.

Thank you for your reply,
Andreas

On Tue, 31 May 2022 at 18:05, Thomas, Robert - FS via QGIS-Developer <
qgis-develo...@lists.osgeo.org> wrote:

> Hi QGIS Community,
>
> A number of years ago, there was an effort to complete the Section 508/EEN
> 301 549 Accessibility Conformance documentation (i.e. Voluntary Product
> Accessibility Template (VPAT) and Web Content Accessibility Guidelines
> (WCAG)) for QGIS; is there a part of the developer/tech support community
> interested in completing these?
>
>
>
> My thought is if there may be some Computer Science or Geo students where
> their program covers testing and conformance as a part of their developer
> program curriculum, then they could use QGIS testing and reporting as a
> part of a class project?  A long term relationship with that University
> could make regular updates sustainable.
>
>
>
> There is lots of good information and resources, including the Template
> here  < Home | Section508.gov
> >.  The last time I posted, the message was
> held up by moderator approval, hopefully this time my message can reach you
> all.
>
>
>
> Having compliance reports adds to QGIS and other open source software
> increased legitimacy and would allow the use by more governmental
> organization that need to meet their procurement requirements.  Other
> thoughts, ideals or volunteers to lead a working group??  Thanks for the
> consideration.
>
>
>
>
>
> Best regards,
>
>
>
> Robert
>
> [image: Forest Service Shield]
>
>
> *Robert E Thomas, GISP Geospatial IT Specialist *
>
> *US Forest Service*
>
> *WO-CIO-MSS-Geospatial Branch*
>
>
> *PC: 415-760-5640 (Note New Number) **robert.tho...@usda.gov*
> 
>
> Remote
> Denver, CO 80228
> www.fs.fed.us
> 
> [image: USDA Logo]
> 
>  [image: Forest Service Twitter]
> 
>  [image: USDA Facebook]
> 
>
> *Caring for the land and serving people*
>
>
>
>
>
>
>
>
> This electronic message contains information generated by the USDA solely
> for the intended recipients. Any unauthorized interception of this message
> or the use or disclosure of the information it contains may violate the law
> and subject the violator to civil or criminal penalties. If you believe you
> have received this message in error, please notify the sender and delete
> the email immediately.
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Re: [Qgis-user] Identify tool and closest vertices (z-values)

[Andreas Neumann via Qgis-user]

Hi,

I examined the geometries further. It is an old Postgis 1.5 database. The
third dimension only shows up in its EWKT form and not in the WKT form.
Really strange.

Seems that older QGIS versions could deal with the EWKT form, but not
anymore.

We'll need to migrate this data anyway - and I assume the issue is gone
when it is properly converted to a more modern Postgis-DB with real 3D
coordinate triples.

Greetings,
Andreas

On Tue, 24 May 2022 at 13:58, Karl Magnus Jönsson via Qgis-user <
qgis-user@lists.osgeo.org> wrote:

> I tested against:
>
> PostgreSQL 11.5 on x86_64-alpine-linux-musl, compiled by gcc (Alpine
> 8.3.0) 8.3.0, 64-bit
>
> Postgis:
>
> 2.5 USE_GEOS=1 USE_PROJ=1 USE_STATS=1
>
>
>
> *Karl-Magnus Jönsson*
>
>
>
>
>
> *Från:* Andreas Neumann 
> *Skickat:* den 24 maj 2022 12:22
> *Till:* Karl Magnus Jönsson 
> *Kopia:* QGIS User List 
> *Ämne:* Re: Sv: [Qgis-user] Identify tool and closest vertices (z-values)
>
>
>
> Hi Karl-Magnus,
>
> Thank you for your confirmation.
>
> It must be something weird about 3D detection from QGIS for Postgis
> layers. I tested with other 3D layers and they work fine, but the layer
> that fails to work with Z-Values is from a much older Postgis-DB.
>
> Maybe it would work fine if we transfer the data to a more modern
> Postgis-DB ...
>
> QGIS display the Metadata as Polygon (PolygonZ) though ...
>
> Strange ...
>
> Andreas
>
> On 2022-05-24 11:21, Karl Magnus Jönsson wrote:
>
> Hi!
>
> It seems to work for me in 3.22.5 with Postgis PolygonZ. Can't remember
> that I've done any custom settings for that.
>
>
>
> *Karl-Magnus Jönsson*
>
>
>
>
>
> *Från:* Qgis-user  *För *Andreas
> Neumann via Qgis-user
> *Skickat:* den 24 maj 2022 10:53
> *Till:* QGIS User List 
> *Ämne:* [Qgis-user] Identify tool and closest vertices (z-values)
>
>
>
> Hi,
>
> We have a a Postgis PolygonZ data set an want to query the third dimension
> of the closest vertex. According to my users, this used to work fine in
> older QGIS versions, but now we can only see the x/y values and not
> z-values anymore.
>
> I just tested it on QGIS 3.22 (LTR) and can conform that the z-values are
> not displayed in the derived data of the identify tool.
>
> Is there any hidden setting that helps us to display the z-values again -
> or a connection parameter that forces QGIS to treat it correctly as a 3d
> data set?
>
> Thank you for any hints,
>
> Andreas
>
>
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Re: [Qgis-user] Identify tool and closest vertices (z-values)

[Andreas Neumann via Qgis-user]

Hi Karl-Magnus,

Thank you for your confirmation.

It must be something weird about 3D detection from QGIS for Postgis 
layers. I tested with other 3D layers and they work fine, but the layer 
that fails to work with Z-Values is from a much older Postgis-DB.


Maybe it would work fine if we transfer the data to a more modern 
Postgis-DB ...


QGIS display the Metadata as Polygon (PolygonZ) though ...

Strange ...

Andreas

On 2022-05-24 11:21, Karl Magnus Jönsson wrote:


Hi!

It seems to work for me in 3.22.5 with Postgis PolygonZ. Can't remember 
that I've done any custom settings for that.


Karl-Magnus Jönsson

Från: Qgis-user  För Andreas Neumann 
via Qgis-user

Skickat: den 24 maj 2022 10:53
Till: QGIS User List 
Ämne: [Qgis-user] Identify tool and closest vertices (z-values)

Hi,

We have a a Postgis PolygonZ data set an want to query the third 
dimension of the closest vertex. According to my users, this used to 
work fine in older QGIS versions, but now we can only see the x/y 
values and not z-values anymore.


I just tested it on QGIS 3.22 (LTR) and can conform that the z-values 
are not displayed in the derived data of the identify tool.


Is there any hidden setting that helps us to display the z-values again 
- or a connection parameter that forces QGIS to treat it correctly as a 
3d data set?


Thank you for any hints,

Andreas___
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[Qgis-user] Identify tool and closest vertices (z-values)

[Andreas Neumann via Qgis-user]

Hi,

We have a a Postgis PolygonZ data set an want to query the third 
dimension of the closest vertex. According to my users, this used to 
work fine in older QGIS versions, but now we can only see the x/y values 
and not z-values anymore.


I just tested it on QGIS 3.22 (LTR) and can conform that the z-values 
are not displayed in the derived data of the identify tool.


Is there any hidden setting that helps us to display the z-values again 
- or a connection parameter that forces QGIS to treat it correctly as a 
3d data set?


Thank you for any hints,

Andreas___
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Re: [Qgis-user] No GetFeatureInfo request sent in QGIS Desktop on WMS layer

[Andreas Neumann via Qgis-user]

Hi Barend,

Thanks. It's been a while since I last worked with UMN map server.

I must have been "blind" not to see the queryable="0" in the 
Capabilities response.


Your suggestions helped. All fine now!

Thanks a lot,

ANdreas

On 2022-05-20 09:18, Kobben, Barend (UT-ITC) wrote:

Your mMAP set up apparently is wrong, because contrary to what you 
think, the layer is NOT queryable:




cave_entrances

Usualy this means you have to set appropriate things in the .map file, 
such as


First, we have to prepare MapServer to actually be set up to respond to 
the request in a way the OpenLayers script can handle:


Edit your .map file. In each LAYER object you want to query, put the 
lines:


TOLERANCE 5

TOLERANCEUNITS pixels

In each LAYER object's METADATA put the extra line:

"wms_include_items" "all"

In each CLASS object put the extra line:

TEMPLATE "empty"

_-- _

_Barend Köbben_

On 20/05/2022, 09:10, "Qgis-user on behalf of Andreas Neumann via 
Qgis-user" qgis-user@lists.osgeo.org> wrote:


Hi,

I am experimenting with a very simple/basic WMS served by UMN 
Mapserver.


For some reasons, GetFeatureInfo does not work, although it is 
"advertised" as available in the GetCapabilities reponse.


Here is the test service: 
http://159.100.248.156/cgi-bin/mapserv.fcgi?map=/home/ubuntu/umn_mapfiles/cave_entrances.map 
[1]


and a link to the GetCapabilities request

http://159.100.248.156/cgi-bin/mapserv.fcgi?map=/home/ubuntu/umn_mapfiles/cave_entrances.map&SERVICE=WMS&REQUEST=GetCapabilities

When I load this layer, i get the two points in the data set, but I 
can't query them. QGIS says "No feature found at this position" and in 
the network debugging session I see that no request is sent to the 
server.


Do you have any idea what might be wrong with this WMS service?

Thank you and greetings,

Andreas




Links:
--
[1] 
http://159.100.248.156/cgi-bin/mapserv.fcgi?map=/home/ubuntu/umn_mapfiles/cave_entrances.map___
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[Qgis-user] No GetFeatureInfo request sent in QGIS Desktop on WMS layer

[Andreas Neumann via Qgis-user]

Hi,

I am experimenting with a very simple/basic WMS served by UMN Mapserver.

For some reasons, GetFeatureInfo does not work, although it is 
"advertised" as available in the GetCapabilities reponse.


Here is the test service: 
http://159.100.248.156/cgi-bin/mapserv.fcgi?map=/home/ubuntu/umn_mapfiles/cave_entrances.map


and a link to the GetCapabilities request

http://159.100.248.156/cgi-bin/mapserv.fcgi?map=/home/ubuntu/umn_mapfiles/cave_entrances.map&SERVICE=WMS&REQUEST=GetCapabilities

When I load this layer, i get the two points in the data set, but I 
can't query them. QGIS says "No feature found at this position" and in 
the network debugging session I see that no request is sent to the 
server.


Do you have any idea what might be wrong with this WMS service?

Thank you and greetings,

Andreas___
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[Qgis-user] QGIS-CH mini workshop on construction tools

[Andreas Neumann via Qgis-user]

Dear QGIS users,

Tomorrow, Wed. May 11, 11:00 to 12:00am MET will be our QGIS-CH mini 
workshop on QGIS construction tools instructed by Denis Rouzaud.


Infos: 
https://qgis.ch/en/events/qgis-ch-mini-workshop-construction-tools [1]


You are welcome to join us on Google Meet: 
https://meet.google.com/cqd-kcvp-cby [2]


Greetings,

Andreas

Links:
--
[1] https://t.co/QO7N31gwub
[2] https://t.co/ZeArOd4NVR___
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Re: [Qgis-user] QGIS - repeated connections

[Andreas Neumann via Qgis-user]

Hi,

Yes, you can limit the nr of CPU cores that render in QGIS - and this 
will limit the PG connections.


Menu "Settings" --> "Options" --> "Rendering".

If you disable the checkbox "Render layers in parallel using many CPU 
cores", this will force QGIS to go single threaded for drawing - or you 
can use the setting to the right of it and set it to use max 2 CPU 
cores, which will restrict it to two connectsions max.


The much better solution, however, would be to use a connection pool 
solution (like pgBouncer). Then the idle connections will be temporarily 
disconnected from the PG server. See the pgBouncer documentation.


Greetings,

Andreas

On 2022-03-09 12:23, Mauricio Vieira Cardoso Filho via Qgis-user wrote:


Hi Alexandre,
Thanks for the answer. Is there any way to prevent this from happening? 
- I ask because I have many users who connect to the postgres database 
through QGIS and for each user connection, it is generating five 
connection sessions in the database. And that has killed Postgres's 
performance. Is there a way to prevent QGIS from generating this amount 
of connections?


Best Regards

Maurício Vieira Cardoso Filho
Gerente TI Infra
Tel: +556137995051
email : mcard...@topocart.com.br;
skype: mauricio.cardoso1974

Em ter., 8 de mar. de 2022 às 23:36, Alexandre Neto 
 escreveu:

Hello Mauricio,

That is "normal". Several different components of QGIS can establish 
different and independent connections to PostgreSQL. For example, the 
browser panel can create a connection, the database manager another, 
and so on.


Alexandre Neto

A terça, 8/03/2022, 20:14, Mauricio Vieira Cardoso Filho via Qgis-user 
 escreveu:
I use QGIS 3.16 and I'm having an operation that I believe to be 
abnormal. I use QGIS connected to a postgres database. My problem is 
that QGIS is creating five simultaneous connections for each database 
user. (For example, when opening qgis and connecting to the bank, on my 
server I have five connections created with my username). Does anyone 
have any idea what could be happening?


Best

Maurício Vieira Cardoso Filho
Gerente TI Infra
Tel: +556137995051
email : mcard...@topocart.com.br;
skype: mauricio.cardoso1974 
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Re: [Qgis-user] Extending an existing line with the vertex tool - combination with tracing possible?

[Andreas Neumann via Qgis-user]

Hi Simon and Nicolas,

Yes, that was our idea, too - to merge two or more lines that share 
their start/end vertices.


But unfortunately, this doesn't work for us, because we edit in a very 
complex data model and QGIS doesn't preserve feature Ids when merging 
features --> all of our DB relations would then fail.


See https://github.com/qgis/QGIS/issues/47629

I asked our commercial support provider to hopefully fix this issue ... 
then we could go the "merge route".


Andreas

On 2022-03-04 09:29, Simon Dietmann via Qgis-user wrote:


Hi Andreas,

as a workaround for your problem I would suppose you draw a new line 
feature using the tracing function and then merge it with the one you 
want to extend.


That should work without any problem.

Simon Dietmann
M.Sc. Physische Geografie

Von: Qgis-user  Im Auftrag von 
Nicolas Cadieux via Qgis-user

Gesendet: Freitag, 4. März 2022 05:13
An: Andreas Neumann 
Cc: QGIS User List 
Betreff: Re: [Qgis-user] Extending an existing line with the vertex 
tool - combination with tracing possible?


Hi,

To my knowledge, when using the vertex tool, you click on the last node 
and then, you can extend it once.  I think you need to reclick the last 
node again if you want to add a new point.  I don't do much vectorizing 
lately and in the past, used AutoCAD to do it. There must be some other 
way of doing it. Maybe there is a shortcut or something like the shift 
key we need to use.  I would check the user manual to see if there is 
an option under the vertex tool.  I see that lots of new tools have 
been added lately making QGIS a good contender for tracing.  I guess 
you could just create a new line and then merge both together.


Just my grain of salt...

Nicolas Cadieux

https://gitlab.com/njacadieux

Le 1 mars 2022 à 05:24, Andreas Neumann  a écrit 
:



Hi,

When I am extending an existing line with the vertex tool (by enabling 
the vertex tool and clicking on the small "plus" symbol), can I then 
still activate the "tracing" functionality to follow along other 
features?


If yes, I haven't found out how - any hints would be appreciated a 
lot!


Thanks,

Andreas

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