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
> <https://www.niwa.co.nz>
> 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 <https://www.niwa.co.nz> Facebook
> <https://www.facebook.com/nzniwa> LinkedIn
> <https://www.linkedin.com/company/niwa> Twitter
> <https://twitter.com/niwa_nz> Instagram
> <https://www.instagram.com/niwa_science> YouTube
> <https://www.youtube.com/channel/UCJ-j3MLMg1H59Ak2UaNLL3A> 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

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
>
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>
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> Citations
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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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>
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>
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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

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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

___

Dott. Geol. Alessandro Maifredi
Cell. 348 2249589

Studio Associato Maifredi
Via dei Giustiniani 26/1
16123 Genova

Geologia Verticale Studio Associato
Via Burlando 12/1
16137 Genova

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___

Dott. Geol. Alessandro Maifredi
Cell. 348 2249589

Studio Associato Maifredi
Via dei Giustiniani 26/1
16123 Genova

Geologia Verticale Studio Associato
Via Burlando 12/1
16137 Genova

**AVVERTENZE AI SENSI DEL D.LGS. 196/2003**
Le informazioni contenute in questo messaggio di posta elettronica e/o 
nel/i file/s allegato/i, sono da considerarsi strettamente riservate. 
Il loro utilizzo è consentito esclusivamente al destinatario del 
messaggio medesimo, per le finalità nello stesso indicate. Qualora lo 
riceveste senza esserne il destinatario, Vi preghiamo cortesemente di 
darcene notizia telefonicamente o via e-mail e di procedere alla sua 
distruzione cancellandolo dal Vostro sistema; costituisce comportamento 
contrario ai principi dettati dal Dlgs. 196/2003 trattenere il 
messaggio, divulgarlo anche in parte, distribuirlo ad altri soggetti, 
copiarlo, od utilizzarlo per finalità diverse.

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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]

; or the use or disclosure of the information it contains may violate the law
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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:
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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:
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[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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[Qgis-user] Extending an existing line with the vertex tool - combination with tracing possible?

[Andreas Neumann]

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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Re: [Qgis-user] Help Ukraine, Boycott Russia

[Andreas Neumann]

Hi Markus,

The naming of the next QGIS release 3.26 (due for release in June) after
Ukraine or Kiew sounds like a good and interesting proposal that should be
discussed in the QGIS PSC and community. Thanks for raising this idea!

Normally we use the place names of "contributor meetings", but the last
version 3.24 was named in honor of Håvard - a very active Norwegian QGIS
community member who unfortunately passed away recently.

Markus: Do you want to send a formal request to the PSC mailing list? See
https://www.qgis.org/en/site/getinvolved/mailinglists.html#qgis-project-steering-committee-psc-list

Thanks,
Andreas

On Fri, 25 Feb 2022 at 14:22, landcons...@freenet.de 
wrote:

> Dear List, dear Andreas,
>
> Andreas, before you close this thread, a final general comment: since 7
> years I am teaching my students at the University in Freiburg that Open
> Source is more than an IT project, it is a movement, that will change the
> world, including values like transparency, participation, shared
> information and first of all freedom and peace. And the QGIS project and
> its vital and global community is a lighthouse project representing all
> these values.
>
> Many commited QGIS users share these values with the rest of the world,
> and therefore show deep solidarity with the Ukraine.
>
> So, here is another - more passive - proposal, how we could address the
> raid on Ukraine adequately: let´s name the next QGIS release "Ukraine" or
> "Kiev" to express the solidarity with the people in Ukraine and their fight
> for freedom.
>
> What do you think?
>
> Best regards,
>
> Markus
>
> Am 25.02.2022 um 11:48 schrieb Andreas Neumann:
>
> Hi all,
>
> May I suggest that we stop this thread here - and try to fight the Russian
> aggression in different ways / different channels? This is not the right
> channel to make a meaningful difference in this horrible war.
>
> As an example, we can try to influence / put some pressure on our local
> governments. Both the German and the Swiss governments are blocking more
> effective sanctions on Russia. By not buying Russian energy and raw
> materials and by freezing bank accounts of Russian oligarchs who support
> this war - this is where we can make a difference. So the pressure needs to
> be put on our European governments - and not in the QGIS user community.
>
> As an example: in Berne / Switzerland there will be a demonstration
> tomorrow at noon to put pressure on our Swiss government to freeze Russian
> bank accounts and to prohibit raw material trading (a lot of Russian raw
> materials are traded in Switzerland). I believe this is where we can make a
> difference.
>
> Wish you all the best,
> Andreas
>
> On Fri, 25 Feb 2022 at 10:50, landcons...@freenet.de <
> landcons...@freenet.de> wrote:
>
>> Dear Andreas, dear list,
>>
>> Andreas, you wrote "*If we start excluding countries and organizations
>> on such assumptions*" I wished you could understand that Putin´s
>> aggression is not stopping in Ukraina (starting in Afghanistan, Chechnya,
>> Georgia, Syria, Ukraina, ...whats next). The only non-atomic power that can
>> stop this is the Russian people.
>>
>> And yes, I know, Russia is not a democracy, and maybe some Russians are
>> "suffering from Putin´s politics" (if it were the "majority" like you say,
>> I had no need to write this letter and Putin never dared to invade the
>> Ukraine).
>>
>> I can also imagine, that many of the Russian QGIS users really appreciate
>> the freedom they feel when they co-operate with the QGIS community. But I
>> am sure the invasion of their army into Ukraine is not a reason for them to
>> start thinking about the legality to kill civilians in independant
>> neighbouring countries.
>>
>> It´s not a reason unless we (the free, democratic and peaceful QGIS
>> community) give them such a reason, which is the boycott of Russian members
>> as long as their troops are in the Ukraine.
>>
>> And, Andreas, when you are asking where to draw a "*red line*", you are
>> not seriously comparing the bombing of Kiev with the "oil exploration" 
>> This is cynical.
>>
>> We must not be passive and hoping "*that this situation can soon be
>> deescalated*" is not enough. The time is now to make it absolutely clear
>> that military force against democratic countries will have consequences for
>> the agressors.
>>
>> And finally to all Russian QGIS users: I like your country and your
>> culture and really appreciate all Russian colleagues I met in the scope of
>> my professional work, this includes all

Re: [Qgis-user] Help Ukraine, Boycott Russia

[Andreas Neumann]

Hi all,

May I suggest that we stop this thread here - and try to fight the Russian
aggression in different ways / different channels? This is not the right
channel to make a meaningful difference in this horrible war.

As an example, we can try to influence / put some pressure on our local
governments. Both the German and the Swiss governments are blocking more
effective sanctions on Russia. By not buying Russian energy and raw
materials and by freezing bank accounts of Russian oligarchs who support
this war - this is where we can make a difference. So the pressure needs to
be put on our European governments - and not in the QGIS user community.

As an example: in Berne / Switzerland there will be a demonstration
tomorrow at noon to put pressure on our Swiss government to freeze Russian
bank accounts and to prohibit raw material trading (a lot of Russian raw
materials are traded in Switzerland). I believe this is where we can make a
difference.

Wish you all the best,
Andreas

On Fri, 25 Feb 2022 at 10:50, landcons...@freenet.de 
wrote:

> Dear Andreas, dear list,
>
> Andreas, you wrote "*If we start excluding countries and organizations on
> such assumptions*" I wished you could understand that Putin´s aggression
> is not stopping in Ukraina (starting in Afghanistan, Chechnya, Georgia,
> Syria, Ukraina, ...whats next). The only non-atomic power that can stop
> this is the Russian people.
>
> And yes, I know, Russia is not a democracy, and maybe some Russians are
> "suffering from Putin´s politics" (if it were the "majority" like you say,
> I had no need to write this letter and Putin never dared to invade the
> Ukraine).
>
> I can also imagine, that many of the Russian QGIS users really appreciate
> the freedom they feel when they co-operate with the QGIS community. But I
> am sure the invasion of their army into Ukraine is not a reason for them to
> start thinking about the legality to kill civilians in independant
> neighbouring countries.
>
> It´s not a reason unless we (the free, democratic and peaceful QGIS
> community) give them such a reason, which is the boycott of Russian members
> as long as their troops are in the Ukraine.
>
> And, Andreas, when you are asking where to draw a "*red line*", you are
> not seriously comparing the bombing of Kiev with the "oil exploration" 
> This is cynical.
>
> We must not be passive and hoping "*that this situation can soon be
> deescalated*" is not enough. The time is now to make it absolutely clear
> that military force against democratic countries will have consequences for
> the agressors.
>
> And finally to all Russian QGIS users: I like your country and your
> culture and really appreciate all Russian colleagues I met in the scope of
> my professional work, this includes all the great QGIS Plugins and Tools
> that came from you.
> Please help us to stop this war and make your contribution to secure
> freedom and peace in Europe and wordlwide!
>
> Best regards,
>
> Markus
>
> Am 24.02.2022 um 13:29 schrieb Andreas Neumann:
>
> Dear Markus,
>
> This is a really difficult topic that you raise here. While I agree that
> the aggression from the Putin regime should be condemned, I am against
> excluding Russian QGIS contributors and sustaining members. If we start
> excluding countries and organizations on such assumptions - where do we
> draw the line? The majority of today's world population unfortunately has
> to live in problematic conditions, when it concerns democracy and
> dictators. Also - where should be draw the line on what is ethical use of
> QGIS and what not? Is oil exploration utilizing QGIS software allowed, as
> an example?
>
> As the current QGIS.ORG treasurer I can say that we had a sustaining
> member from Russia last year - there is no indication that this company is
> collaborating with the Putin government - though it is of course a bit hard
> to judge - of course - for outsiders.
>
> The vast majority of the Russian population is probably suffering from
> Putin's politics - my guess is that the majority of the Russian population
> would like to live in peace and prosperity and not be involved in such war
> and aggression. But do they have a real choice? Fair elections? I doubt it
> ... In that sense I am against excluding Russian QGIS users and
> contributors based on these events.
>
> We also have QGIS contributors from Ukraine who are now affected by this
> aggression - let's be supportive when there could be Ukrainian refugees in
> the coming months - and let's hope that this situation can soon be
> deescalated.
>
> Greetings,
> Andreas
>
> On Thu, 24 Feb 2022 at 10:09, landcons...@freenet.de <
> landcons...@freene

Re: [Qgis-user] Help Ukraine, Boycott Russia

[Andreas Neumann]

Dear Markus,

This is a really difficult topic that you raise here. While I agree that
the aggression from the Putin regime should be condemned, I am against
excluding Russian QGIS contributors and sustaining members. If we start
excluding countries and organizations on such assumptions - where do we
draw the line? The majority of today's world population unfortunately has
to live in problematic conditions, when it concerns democracy and
dictators. Also - where should be draw the line on what is ethical use of
QGIS and what not? Is oil exploration utilizing QGIS software allowed, as
an example?

As the current QGIS.ORG treasurer I can say that we had a sustaining member
from Russia last year - there is no indication that this company is
collaborating with the Putin government - though it is of course a bit hard
to judge - of course - for outsiders.

The vast majority of the Russian population is probably suffering from
Putin's politics - my guess is that the majority of the Russian population
would like to live in peace and prosperity and not be involved in such war
and aggression. But do they have a real choice? Fair elections? I doubt it
... In that sense I am against excluding Russian QGIS users and
contributors based on these events.

We also have QGIS contributors from Ukraine who are now affected by this
aggression - let's be supportive when there could be Ukrainian refugees in
the coming months - and let's hope that this situation can soon be
deescalated.

Greetings,
Andreas

On Thu, 24 Feb 2022 at 10:09, landcons...@freenet.de 
wrote:

> Dear List,
>
> like all free people in the world I totally condemn the Russian invasion
> in Ukraine this morning. This is an attack on the free world and especially
> on Europe and on all values of freedom which we all represent in a global,
> peaceful open source community.
>
> - So, what can each individual do to defend this freedom?
> - What can the QGIS community do?
> - How can we be sure, that the know-how we develop will not be used for
> Russian military purposes against the Ukraine?
>
> The invasion was confirmed by the Duma, the Russian parliament which is
> the representative body of the Russian people. Consequently the Russian
> population bears responsibility for the invasion and we should led them
> know, that military force against an independent, free and democratic
> European country goes against all the values ​​we stand for in the open
> source community.
>
> The least we can do is starting to think about a boycott of Russian
> products and Russian co-operations to express our opinion to all Russian
> companies and partners we know. Finally its up to the ordinary Russian man
> to change this unbearable situation which is becoming a permanent threat to
> free Europe.
>
> With this respect the QGIS developer community should also think about
> excluding Russian partners and sponsors from all QGIS activities as long as
> Russian troops are in the Ukraine.
>
> I think, the values of freedom we stand for, is the highest good we must
> defend!
>
> How do you think about it?
>
> Very concerned greeting.
>
> Markus Weidenbach
> landConsult.de
> Bühl/Germany
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-- 

--
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QGIS.ORG board member (treasurer)
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Re: [Qgis-user] Point cloud vertical profiles and measurements (QGIS version 3.22)

[Andreas Neumann]

Hi Ranjith,

This is not (yet) available in QGIS. But there is a recent successful 
crowd funding 
https://www.lutraconsulting.co.uk/crowdfunding/elevation-pointcloud-enhancements-qgis/


You can probably expect this functionality with either QGIS 3.26 or 
3.28.


Andreas

On 2022-02-01 10:01, Ranjith Gopalakrishnan wrote:


Hi,

I am using QGIS version 3.22.3 (QGIS 3.18+ supports point cloud 
visualisation natively, see here [1]). I have some point cloud data 
generated from LiDAR instruments. I would like to generate several 
vertical profiles at various locations of the point cloud extents. And 
I would like to make vertical measurements, to determine vertical 
height differences.


For example, in ArcMAP 10.5, after I have loaded the LiDAR data, I can 
use the "profile view" tool. In that tool, I can make vertical 
measurements. Please see the screenshot below; blue points are from one 
point cloud source and red one are from another. Is there any way to do 
the same thing in QGIS?


[2]

I have also posted the same question in gis.stackexchange.com [3], here 
[4].


Regards,

Ranjith.

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[1] https://qgis.org/en/site/forusers/visualchangelog318/
[2] https://i.stack.imgur.com/d1suG.png
[3] http://gis.stackexchange.com
[4] 
https://gis.stackexchange.com/questions/422531/point-cloud-vertical-profiles-and-measurements-qgis-version-3-22___
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Re: [Qgis-user] representation of angles in QGIS - recalculation to arithmetic values

[Andreas Neumann]

Hi Andrea,

Nice shortcut - and use of the modulus operator! Now the calculation is 
really short!


Nevertheless it would be kind of nice to have a QGIS expression function 
to convert azimuth into math angles. I assume that Christine wouldn't be 
the only one looking for this calculation.


Christine - do you want to create a feature request for such an 
expression function at https://github.com/qgis/QGIS/issues ?


Andreas

On 2021-12-07 08:49, Andrea Giudiceandrea wrote:


Richard Greenwood [1] Mon, 06 Dec 2021 10:57:06 -0800 [2]

g = (450-m) - int((450-m) / 360) * 360
where m = mathematical angle (0 east, anti-clockwise)
and g = geographic angle (0 north, clockwise)


Which is equivalent to:

g = (450-m) % 360

Best regards.

Andrea Giudiceandrea
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Re: [Qgis-user] mapping bus routes

[Andreas Neumann]

and yes - the problem is really not simple, but indeed very challenging.

Most transit maps today are not done in a GIS, but by designers in a 
graphics applications, like Adobe-Illustrator. The process is usually 
not automated, but manual.


However, I believe a semi-automated approach would be great to have. For 
some, the outcome might be satisfactory, for others not - and these 
could start with (Q)GIS and continue later in a graphics package.


Andreas

On 2021-10-08 08:54, Andreas Neumann wrote:


Hi,

Besides on what was discussed here on the list already, I can add the 
following information: the Swiss QGIS user group has mandated Nyall 
Dawson to carry out a couple of days of research exactly on this topic 
- kind of a feasibility study if it would be possible to draw such 
network maps "on the fly" / automatically - with transit maps and 
hiking maps (multiple parallel hiking routes) in mind.


I believe Nyall will work on this before the end of the year.

Of course we cannot promise anything - but based on the outcome of this 
study, there might be follow-up work pending. If there is interest from 
other users we might want to organize an institutional crowd funding 
initiative.


This won't help you immediately - but it might be good for you to know 
that the problem is on the radar. If there is a positive outcome in the 
study, there might be implementation work pending next year.


Greetings,

Andreas

On 2021-10-07 23:53, David Strip wrote:

For a transit map, it seems the offset would not be constant. Consider 
two bus routes that overlap along a single street in their routes. On 
that street, the two lines typically would be offset to opposite sides 
of the line representing the street. On the rest of the route, however, 
the route would be shown as lying directly over the centerline, not 
offset to either side. Life gets even more complicated when multiple 
routes overlap with different numbers of other routes at various points 
on the map.  Or at least that's what I've typically seen on transit 
maps.


On 10/7/2021 3:30 PM, Nicolas Cadieux wrote: Hi,
You can also trim the lines in the symbology (at least in QGIS 3.20) as 
well as giving it an offset.  That will insure that intersection are 
not overlapping in the offset.


Nicolas Cadieux
https://gitlab.com/njacadieux

Le 7 oct. 2021 à 17:23, Nicolas Cadieux  a 
écrit :


Oups!  Forgot the list...

Nicolas Cadieux
https://gitlab.com/njacadieux

Le 7 oct. 2021 à 17:23, Nicolas Cadieux  a 
écrit :


Hi,
You can automatically draw an offset by adding a offset in the 
symbology.  Things get more complicated when line vectorization changes 
directions as the offset flips side depending on, for example, if the 
line is drawn from A to B or B to A.


In the QGIS models, https://plugins.qgis.org/, go to models then Fix 
Directional Network models 1,2 and 3.  That will help you find problems 
(like disconnected lines) but also identify all the lines that are 
flipped. You can then flip them manually or figure out an algorithm to 
do it automatically.


You will also find a boring YouTube video on my YouTube channel. 
https://youtu.be/v61PafSByvM


Nicolas Cadieux
https://gitlab.com/njacadieux

Le 7 oct. 2021 à 14:17, Hugh Kelley  a écrit :

Hi all,

I'm wondering if anyone has any good tricks for mapping bus routes. The 
key problem is defining how to offset lines where the routes overlap.


I've handled this by chopping up the lines and offsetting in postgis 
according to some st_dwithins and st_intersections but wanted to see if 
there is anything in the wide world of QGIS that I'm not aware of.


My understanding is that it's a fairly significant challenge to do a 
great job with it. A company called transitapp had an interesting blog 
post about it a while ago. 
https://archive.transitapp.com/transit-maps-apple-vs-google-vs-us-cb3d7cd2c362#.e9kcryzg1


Hugh
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Re: [Qgis-user] mapping bus routes

[Andreas Neumann]

Hi,

Besides on what was discussed here on the list already, I can add the 
following information: the Swiss QGIS user group has mandated Nyall 
Dawson to carry out a couple of days of research exactly on this topic - 
kind of a feasibility study if it would be possible to draw such network 
maps "on the fly" / automatically - with transit maps and hiking maps 
(multiple parallel hiking routes) in mind.


I believe Nyall will work on this before the end of the year.

Of course we cannot promise anything - but based on the outcome of this 
study, there might be follow-up work pending. If there is interest from 
other users we might want to organize an institutional crowd funding 
initiative.


This won't help you immediately - but it might be good for you to know 
that the problem is on the radar. If there is a positive outcome in the 
study, there might be implementation work pending next year.


Greetings,

Andreas

On 2021-10-07 23:53, David Strip wrote:

For a transit map, it seems the offset would not be constant. Consider 
two bus routes that overlap along a single street in their routes. On 
that street, the two lines typically would be offset to opposite sides 
of the line representing the street. On the rest of the route, however, 
the route would be shown as lying directly over the centerline, not 
offset to either side. Life gets even more complicated when multiple 
routes overlap with different numbers of other routes at various points 
on the map.  Or at least that's what I've typically seen on transit 
maps.


On 10/7/2021 3:30 PM, Nicolas Cadieux wrote: Hi,
You can also trim the lines in the symbology (at least in QGIS 3.20) as 
well as giving it an offset.  That will insure that intersection are 
not overlapping in the offset.


Nicolas Cadieux
https://gitlab.com/njacadieux

Le 7 oct. 2021 à 17:23, Nicolas Cadieux  a 
écrit :


Oups!  Forgot the list...

Nicolas Cadieux
https://gitlab.com/njacadieux

Le 7 oct. 2021 à 17:23, Nicolas Cadieux  a 
écrit :


Hi,
You can automatically draw an offset by adding a offset in the 
symbology.  Things get more complicated when line vectorization changes 
directions as the offset flips side depending on, for example, if the 
line is drawn from A to B or B to A.


In the QGIS models, https://plugins.qgis.org/, go to models then Fix 
Directional Network models 1,2 and 3.  That will help you find problems 
(like disconnected lines) but also identify all the lines that are 
flipped. You can then flip them manually or figure out an algorithm to 
do it automatically.


You will also find a boring YouTube video on my YouTube channel. 
https://youtu.be/v61PafSByvM


Nicolas Cadieux
https://gitlab.com/njacadieux

Le 7 oct. 2021 à 14:17, Hugh Kelley  a écrit :

Hi all,

I'm wondering if anyone has any good tricks for mapping bus routes. The 
key problem is defining how to offset lines where the routes overlap.


I've handled this by chopping up the lines and offsetting in postgis 
according to some st_dwithins and st_intersections but wanted to see if 
there is anything in the wide world of QGIS that I'm not aware of.


My understanding is that it's a fairly significant challenge to do a 
great job with it. A company called transitapp had an interesting blog 
post about it a while ago. 
https://archive.transitapp.com/transit-maps-apple-vs-google-vs-us-cb3d7cd2c362#.e9kcryzg1


Hugh
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Re: [Qgis-user] Multi User - QGIS

[Andreas Neumann]

Hi Alexander,

If you use the PostgreSQL transaction mode, you can edit multiple 
related tables at once and get the IDs immediately (even before saving 
your data).


See Project -->  Properties --> Data Sources and enable at least the 
following two checkboxes potentially also the third one:


* Automatically create transaction groups where possible
* Evaluate default values on provider side

If you want to be on the safe side for future avoidance of ID clashes, 
you can also consider using UUID as your primary key column. That will 
allow you in the future to better merge independent data sources without 
having to worry about ID clashes.


Greetings,

Andreas

On 2021-09-13 09:45, Jorge Gustavo Rocha wrote:


Hi Alexander,

You should not set an expression manually. If the id column is comes 
from a PostgreSQL identity/sequence based column, QGIS is get the exact 
id when the write operation is executed. It works fine with any number 
of users.


Set you column with (on the PostgreSQL side):

id INT GENERATED ALWAYS AS IDENTITY

I hope it helps.

Jorge Gustavo

On 13/09/21 07:27, Alexander Klemm - km3 teledienst GmbH wrote:


Hello,

we want to use QGIS to document our cable Infrastructure (We are an 
ISP). Now the Problem is, that 3 or 4 persons have to work with QGIS. 
Now my Idea was to provide a Postgresql Server with postgis installed. 
Thats working fine. The Project and the Layers are stored into the 
Postgresql Server and all Persons could work with it. Now my Problem 
is, that the Contents of the Layers must have an unique ID. The ID is 
set by the default value at the attribute form with_ 
"maximum($id)+1"_. If two persons are working on the QGIS System, the 
Problem is, that there are duplicated IDs, because the IDs will not be 
stored immediately. Is there a solution for this problem?


thank you for helping
best regards

Alexander Klemm

Mit freundlichen Grüßen
Alexander Klemm

km3 teledienst GmbH - August-Bebel-Str. 86 - 08344 Grünhain-Beierfeld
Tel. +49 (0)3774 13931-0 - Fax +49 (0)3774 13931-02
bu...@km3.de - https://www.km3.de
Geschäftsführer: Heiko Lötzsch und Mike Bielagk
Registergericht: Amtsgericht Chemnitz - Handelsregister: B Nr. 18881
Umsatzsteuer-ID: DE 216 086 551 - Steuer-Nr.: 218 / 112 / 02921

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Re: [Qgis-user] Atlas - Make sourrounding of Coverage Layer transparent

[Andreas Neumann]

Hi Roland,

You can achieve this with the "inverted polygon" renderer where you
basically style all areas outside of the current atlas polygon - typically
used with some transparency to make the non-atlas feature "lighter".

Or with the rule-based renderer where you can ask if the atlas-id is the
same as the current feature id, a rule similar to:
pk_column = attribute(@atlas_feature,'pk_column')
and then style the atlas feature differently (or not at all) as all other
features (ELSE rule).

If you want this for atlas print only, you could create a separate,
additional style for this, or an extra set of layers that are only
displayed/printed in the atlas layout context.

Let us know if you need some more assistance for either option.

Greetings,
Andreas

On Thu, 19 Aug 2021 at 15:02, Roland Spielhofer  wrote:

> Hi,
> I use a polygon layer as coverage layer for creating an atlas.
> What I would like to have is that everything outside of the polygon shown
> on the atlas page is shown transparent.
> The inside of the polygon should display normal.
>
>
> I made a picture showing what I would like to achieve. The left side of
> the dotted orange polygon (=coverage layer) is what I am looking for.
> https://imgur.com/a/1UXgFKr
>
> How can this be done?
>
> Regards,
> Roland
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Re: [Qgis-user] images on report

[Andreas Neumann]

Sure - just use the image and use a dynamic path generated from an 
expression. Even images in blob (PostgreSQL confirmed, maybe also 
geopackage) should work.


Andreas

On 2021-08-06 11:07, Dario C wrote:


Hi,
I'm doing a report and I'm able to do chert and table related on the 
displayed page of the report.


Is there any way to insert also an image, different and related for 
each page of the report?


Thank you

cheers,
Dario
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Re: [Qgis-user] Multiplicity in Model Input (Layers)

[Andreas Neumann]

Hi Andrew,

Yes, the "Multiple Input" input type should do the trick. After that 
input parameter you'd normally have to merge all input files/layers into 
one. The "Merge vector layers" transformer seems to be one of the very 
few (or the only) algorithm that seems to accept multi-layer input.


Of course the "Merge vector layers" algorithm expects the layer to have 
the same structure, otherwise you'll have some really funny and 
unpredictable results.


Greetings and hope this helps,

Andreas

On 2021-07-15 09:46, Alexandre Neto wrote:


Hi Andrew,

You need to use the "multiple input" input type.

Best regards

Alexandre Neto
User support
www.qcooperative.net [1]

A quinta, 15/07/2021, 08:33, Andrew Hughes  
escreveu:



Hi All,

Could any provide some advice as I am new to this and need some 
guidance please.


My model needs to consume data from MULTIPLE Esri rest layers. I can 
do this for on a 1:1 basis where I manually add 1 input vector layer 
per esri rest layer. But that's not great. This model is not easily 
reusable, as the number of layers always varies.


Q1: The merge processor takes in a multi-layers on a single input - 
but I can't see how this is done in a model. Can anyone please 
explain?


Q2: Is is possible for me to write a python processor that doesn't 
require any project layers as input, it can create the layers itself 
(in code/config) and feed them into the merge processor and output the 
single merged layer?


Thanks in advance
Andrew
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Re: [Qgis-user] Hide/Show form field depending on precedent field values

[Andreas Neumann]

Hi Arnaud,

You cannot have conditional visibility on a single widget (unless you do 
it yourself with Python), but you can have conditional visibility on a 
group based on an expression that can reference the value of another 
field.


Create a "Group" container in the drag and drop form with the "green 
plus" icon. Then click on the group, activate the "Control visibility by 
Expression" and enter your expression. The expression needs to return 1 
for visible or 0 for not visible.


Hope this helps,

Andreas

On 2021-06-11 07:01, Arnaud Vandecasteele wrote:


Hi,

When creating a form by drag and drop fields, all fields are displayed 
unless you choose the hidden widget or you remove them from the field.


But how to hide or show a form field depending on whether the user has 
completed a previous field?


Thanks,

Arnaud

--


Arnaud Vandecasteele

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Re: [Qgis-user] Editing attributes in embedded forms

[Andreas Neumann]

Hi Pekka,

Have you enabled the  transaction mode in your project?

See menu "Project" --> "Properties" --> "Data Sources".

I usually enable all three check boxes:

- Automatically create transaction groups where possible

- Evaluate default values on provider side

- Trust project when data source has no metadata

The transaction mode allows to edit all layers from the same data base 
connection (needs identical db connection string and credentials) and - 
together with "evaluate default values on provider side" - immediately 
retrieves primary keys from the DB, so that you can link objects 
immediately, without having to save first.


Greetings,

Andreas

On 2021-06-01 09:55, Pekka Sarkola wrote:


Hi folks!

I have a problem editing feature attributes in embedded forms. Data is 
stored in PostGIS and I have a simple 1:1 relationship with the 
geometry table and an additional attribute table. QGIS version is 
3.18.3 on Ubuntu.


I have created a custom form with a drag-and-drop designer. I can edit 
additional attribute table attributes in embedded form, but those edits 
are not stored anywhere. I have to open a separate form and then edit 
attribute values of the related attribute table. This is quite annoying 
for the end user.


Any suggestions? Or should I write a better description to the Github?

Rgs,

Pekka

Pekka Sarkola
Gispo Oy
pekka.sark...@gispo.fi   - GSM +358 40 725 2042
www.gispo.fi [1] - www.paikkatieto.com [2]
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Re: [Qgis-user] Fw: Did scale change outputting to PDF?

[Andreas Neumann]

Hi John,

Another source of error is that you accidentally change the map scale 
during exporting the PDF map sheets in QGIS.


Did you generate the PDF in the main QGIS window or in the "Menu Project 
--> Import/Export --> Export map to PDF" or by making a print layout in 
the separate print layout window and then exporting from there?


I strongly recommend the latter approach.

Also, when you generate a series of PDFs with the same scale and 
different extend, you should preferably use the Atlas print 
functionality - maybe you did that anyway.


Not knowing more about the process, I can see several stages in the 
process where the map scale may accidentally change.


Also - you may already know this - but to state the obvious: the map 
scale in the main QGIS windows is not tightly linked to the map scale of 
the print layout window. They are independent.


Hope this all helps a bit and makes sense?

Andreas

On 2021-05-27 10:15, Andreas Neumann wrote:


Hi John,

No - the PDF export does not distort the scale. But the printing of the 
PDF file might.


It is absolutely important that - when printing the PDF - the setting 
"Actual size" or "Custom Scale at 100%" is used. All other options will 
change the scale.


As far as I know, the default option when printing is "Fit", which will 
often shrink the content by some percentage - because some often 
"invisible" or white background might be present in the file that 
extends right to the edge of the page format. Acrobat then thinks that 
the content goes beyond the "printable area" of the printer and will 
scale down the whole file.


Hope that clarifies this potential pit-fall when printing PDF files. It 
might well be a different issue than the one I describe, but this is a 
very common source of error that I know.


Andreas

On 2021-05-27 10:02, John Antkowiak wrote:

Hi, Jochen. Your suggestion sounds do-able; I'll play around with it 
and see if I can sort it out. I've got some digital calipers around 
here somewhere :)


What I'm hearing is that the process of converting both the base map 
(and yes, I did create it in QGIS) and the parcel maps into PDF will 
distort the scale. (And that a print shop might compound the problem by 
manually fitting the source file to the printable area. Yes?) A 
question then is why didn't the PDF conversion distort them all the 
same way, to the same degree? The base maps are done now and I couldn't 
afford to do them again no matter what, so they are what they are. 
Going forward, is there an export option in Print Layout that will not 
distort the scale of the parcel maps?


I am so relieved that someone has an explanation for this!

- John A.

- Forwarded Message -
From: j.hu...@post-ist-da.de 
To: "qgis-user@lists.osgeo.org" 
Sent: Thursday, May 27, 2021, 03:33:12 AM EDT
Subject: Re: [Qgis-user] Did scale change outputting to PDF?

Hi John,

as I understand it, you created the base map in QGIS. If you use the 
measure tool in QGIS to get the distance between two distinct features 
in the map (e.g. road intersections) and then measure the same distance 
on the printed base map with a ruler, it should be possible to 
calculate the scale. Maybe use two distances, one aligned more or less 
horizontally and one vertically, to check if the scaling is 
proportional.


As Andreas pointed out, it is probably a problem with the settings when 
the PDF was printed. In my experience it is a good idea to go to print 
shops usually working for architects and engineers since they are 
familiar with the importance of scaling (for advertising etc. it is 
more important that the whole content is printed, so that scaling might 
be used to fit the output to the printable area without potential 
cropping).
You can print directly to a plotter in QGIS if you have access to the 
device, avoiding the PDF detour.


EPSG 2264 should be fine. Units should be US feet.

Regards
Jochen

Am 27.05.21 um 07:15 schrieb John Antkowiak:

Hi. This plan was too simple to fail - but it failed. The charity whose 
project this is needed a large (that is... massive) paper wall map on 
which to plot and rethink its delivery driver assignments. Both drivers 
and delivery addresses are subject to change from week to week but it's 
not a pizza delivery; this is a regular run to supply people in a bad 
way. So the plan was to print the base map (roads and road names and 
county boundaries only) and then print 8.5 x 11 address maps with 
parcel data and orthos. That way, the base maps don't change but the 
physical parcel layer is flexible. (On top of that is a third paper 
layer indicating which drivers go where so someone can stand back and 
take in the whole picture graphically. Not a cutting-edge state of the 
digital art solution, but not everyone is cut out for that. It is what 
it is.) In order for this to work, the parcel maps have

Re: [Qgis-user] Fw: Did scale change outputting to PDF?

[Andreas Neumann]

Hi John,

No - the PDF export does not distort the scale. But the printing of the 
PDF file might.


It is absolutely important that - when printing the PDF - the setting 
"Actual size" or "Custom Scale at 100%" is used. All other options will 
change the scale.


As far as I know, the default option when printing is "Fit", which will 
often shrink the content by some percentage - because some often 
"invisible" or white background might be present in the file that 
extends right to the edge of the page format. Acrobat then thinks that 
the content goes beyond the "printable area" of the printer and will 
scale down the whole file.


Hope that clarifies this potential pit-fall when printing PDF files. It 
might well be a different issue than the one I describe, but this is a 
very common source of error that I know.


Andreas

On 2021-05-27 10:02, John Antkowiak wrote:

Hi, Jochen. Your suggestion sounds do-able; I'll play around with it 
and see if I can sort it out. I've got some digital calipers around 
here somewhere :)


What I'm hearing is that the process of converting both the base map 
(and yes, I did create it in QGIS) and the parcel maps into PDF will 
distort the scale. (And that a print shop might compound the problem by 
manually fitting the source file to the printable area. Yes?) A 
question then is why didn't the PDF conversion distort them all the 
same way, to the same degree? The base maps are done now and I couldn't 
afford to do them again no matter what, so they are what they are. 
Going forward, is there an export option in Print Layout that will not 
distort the scale of the parcel maps?


I am so relieved that someone has an explanation for this!

- John A.

- Forwarded Message -
From: j.hu...@post-ist-da.de 
To: "qgis-user@lists.osgeo.org" 
Sent: Thursday, May 27, 2021, 03:33:12 AM EDT
Subject: Re: [Qgis-user] Did scale change outputting to PDF?

Hi John,

as I understand it, you created the base map in QGIS. If you use the 
measure tool in QGIS to get the distance between two distinct features 
in the map (e.g. road intersections) and then measure the same distance 
on the printed base map with a ruler, it should be possible to 
calculate the scale. Maybe use two distances, one aligned more or less 
horizontally and one vertically, to check if the scaling is 
proportional.


As Andreas pointed out, it is probably a problem with the settings when 
the PDF was printed. In my experience it is a good idea to go to print 
shops usually working for architects and engineers since they are 
familiar with the importance of scaling (for advertising etc. it is 
more important that the whole content is printed, so that scaling might 
be used to fit the output to the printable area without potential 
cropping).
You can print directly to a plotter in QGIS if you have access to the 
device, avoiding the PDF detour.


EPSG 2264 should be fine. Units should be US feet.

Regards
Jochen

Am 27.05.21 um 07:15 schrieb John Antkowiak:

Hi. This plan was too simple to fail - but it failed. The charity 
whose project this is needed a large (that is... massive) paper wall 
map on which to plot and rethink its delivery driver assignments. Both 
drivers and delivery addresses are subject to change from week to week 
but it's not a pizza delivery; this is a regular run to supply people 
in a bad way. So the plan was to print the base map (roads and road 
names and county boundaries only) and then print 8.5 x 11 address maps 
with parcel data and orthos. That way, the base maps don't change but 
the physical parcel layer is flexible. (On top of that is a third 
paper layer indicating which drivers go where so someone can stand 
back and take in the whole picture graphically. Not a cutting-edge 
state of the digital art solution, but not everyone is cut out for 
that. It is what it is.) In order for this to work, the parcel maps 
have to be the same scale as the base map. Which they were... in QGIS.


We have to convert all the maps to PDF to print them, and we had to 
send the base map PDFs to FedEx/Kinkos to print the 9 map grid panels 
at 42" by 62" each.


When we got the big base maps up on the wall, we discovered the scale 
did not match the 8.5" x 11" parcel maps output to PDF and printed 
from home. It's not off by a lot, but it's enough to be painfully 
obvious from a single standard size sheet of paper. I don't know how 
to reverse engineer the big map scale precisely enough to enter a new 
scale number in the QGIS Print Layout. I didn't foresee it because 
this never would've been a conceivable scenario at the engineering 
firm where I picked up my meager GIS skills. (ArcMap sent a map 
directly to the plotter without interim steps.) There was no scale bar 
on the map. It shouldn't have been needed for this.


Did something happen to the map scale when QGIS output the map to PDF? 
Could the size of the image on the pdf page have been adjusted 
manually or otherwise when being sent to a pl

Re: [Qgis-user] Did scale change outputting to PDF?

[Andreas Neumann]

Hi again John,

Another thing: what projection (CRS) did you use? Not all CRS are 
suitable for printing to scale - esp. the Web Mercator projections are 
often not suitable.


Greetings,

ANdreas

On 2021-05-27 08:20, Andreas Neumann wrote:


Hi John,

A very common error when printing PDF maps (regardless of the software 
that generated the PDF), is that the print shop scales it down to fit 
the "printable" area. Then you end up at somewhere around 95% (plus / 
minus) a bit


The PDF viewers (at least the Acrobat one) has a setting to print at 
100% (but this is not the default) - it has to be done consciously. 
However, this normally scales uniformly, not separately for width and 
height.


On the topic of "base maps":

Can you explain what source/mechanism for "base maps" you used? Are you 
refering to "tiled" maps, perhaps consumed through the OpenLayers 
plugin? This plugin is a known to be a source of error for 
misalignments and the plugin should be avoided. Even if you didn't use 
this plugin, I have to say that tiled base maps (e.g. consumed by the 
quick map services plugin or otherwise) are usually not suited for 
printing as their resolution is optimized for screen viewing. Printing 
these tiles would result in disappointing quality.


Greetings,

Andreas

On 2021-05-27 07:15, John Antkowiak wrote:

Hi. This plan was too simple to fail - but it failed. The charity 
whose project this is needed a large (that is... massive) paper wall 
map on which to plot and rethink its delivery driver assignments. Both 
drivers and delivery addresses are subject to change from week to week 
but it's not a pizza delivery; this is a regular run to supply people 
in a bad way. So the plan was to print the base map (roads and road 
names and county boundaries only) and then print 8.5 x 11 address maps 
with parcel data and orthos. That way, the base maps don't change but 
the physical parcel layer is flexible. (On top of that is a third 
paper layer indicating which drivers go where so someone can stand 
back and take in the whole picture graphically. Not a cutting-edge 
state of the digital art solution, but not everyone is cut out for 
that. It is what it is.) In order for this to work, the parcel maps 
have to be the same scale as the base map. Which they were... in QGIS.


We have to convert all the maps to PDF to print them, and we had to 
send the base map PDFs to FedEx/Kinkos to print the 9 map grid panels 
at 42" by 62" each.


When we got the big base maps up on the wall, we discovered the scale 
did not match the 8.5" x 11" parcel maps output to PDF and printed 
from home. It's not off by a lot, but it's enough to be painfully 
obvious from a single standard size sheet of paper. I don't know how 
to reverse engineer the big map scale precisely enough to enter a new 
scale number in the QGIS Print Layout. I didn't foresee it because 
this never would've been a conceivable scenario at the engineering 
firm where I picked up my meager GIS skills. (ArcMap sent a map 
directly to the plotter without interim steps.) There was no scale bar 
on the map. It shouldn't have been needed for this.


Did something happen to the map scale when QGIS output the map to PDF? 
Could the size of the image on the pdf page have been adjusted 
manually or otherwise when being sent to a plotter with 42" paper? 
Could the image have been distorted horizontally differently from 
vertically? For the life of me, I cannot trial-and-error guess at a 
scale to enter. I've gone through dozens of new 8.5" x 11" test maps 
trying to guess the correct scale.


Any ideas?

Thank you all -

John A.
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Re: [Qgis-user] Did scale change outputting to PDF?

[Andreas Neumann]

Hi John,

A very common error when printing PDF maps (regardless of the software 
that generated the PDF), is that the print shop scales it down to fit 
the "printable" area. Then you end up at somewhere around 95% (plus / 
minus) a bit


The PDF viewers (at least the Acrobat one) has a setting to print at 
100% (but this is not the default) - it has to be done consciously. 
However, this normally scales uniformly, not separately for width and 
height.


On the topic of "base maps":

Can you explain what source/mechanism for "base maps" you used? Are you 
refering to "tiled" maps, perhaps consumed through the OpenLayers 
plugin? This plugin is a known to be a source of error for misalignments 
and the plugin should be avoided. Even if you didn't use this plugin, I 
have to say that tiled base maps (e.g. consumed by the quick map 
services plugin or otherwise) are usually not suited for printing as 
their resolution is optimized for screen viewing. Printing these tiles 
would result in disappointing quality.


Greetings,

Andreas

On 2021-05-27 07:15, John Antkowiak wrote:

Hi. This plan was too simple to fail - but it failed. The charity whose 
project this is needed a large (that is... massive) paper wall map on 
which to plot and rethink its delivery driver assignments. Both drivers 
and delivery addresses are subject to change from week to week but it's 
not a pizza delivery; this is a regular run to supply people in a bad 
way. So the plan was to print the base map (roads and road names and 
county boundaries only) and then print 8.5 x 11 address maps with 
parcel data and orthos. That way, the base maps don't change but the 
physical parcel layer is flexible. (On top of that is a third paper 
layer indicating which drivers go where so someone can stand back and 
take in the whole picture graphically. Not a cutting-edge state of the 
digital art solution, but not everyone is cut out for that. It is what 
it is.) In order for this to work, the parcel maps have to be the same 
scale as the base map. Which they were... in QGIS.


We have to convert all the maps to PDF to print them, and we had to 
send the base map PDFs to FedEx/Kinkos to print the 9 map grid panels 
at 42" by 62" each.


When we got the big base maps up on the wall, we discovered the scale 
did not match the 8.5" x 11" parcel maps output to PDF and printed from 
home. It's not off by a lot, but it's enough to be painfully obvious 
from a single standard size sheet of paper. I don't know how to reverse 
engineer the big map scale precisely enough to enter a new scale number 
in the QGIS Print Layout. I didn't foresee it because this never 
would've been a conceivable scenario at the engineering firm where I 
picked up my meager GIS skills. (ArcMap sent a map directly to the 
plotter without interim steps.) There was no scale bar on the map. It 
shouldn't have been needed for this.


Did something happen to the map scale when QGIS output the map to PDF? 
Could the size of the image on the pdf page have been adjusted manually 
or otherwise when being sent to a plotter with 42" paper? Could the 
image have been distorted horizontally differently from vertically? For 
the life of me, I cannot trial-and-error guess at a scale to enter. 
I've gone through dozens of new 8.5" x 11" test maps trying to guess 
the correct scale.


Any ideas?

Thank you all -

John A.
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Re: [Qgis-user] question on advanced digitizing

[Andreas Neumann]

Hi Gabriel,

Yes - this is possible - but it is a bit hard to find.

I will try to explain (and yes, this would need improvements in the 
digitizing chapter of the QGIS manual).


Steps:

1. Enable Snapping on your active layer

2. Enable "Self Snapping"

3. Press the "Add Polygon Feature" button (but don't yet digitize)

4. Enable "Advanced Digitizing"

5. In the "Advanced Digitizing" panel select the angles you want to snap 
to


6. Start digitizing by pressing the left mouse button and adding the 
first segment with the second click


7. Add any additional segments by staying with the new segments within 
the angle tolerance in order to get new segments with proper right 
angles


8. If you want to close: first press "Alt-A" to fix the angle. Second: 
go to your initial start point and snap to it with the Left Mouse Button


9. Press "Right Mouse button" to finish editing the polygon

Here is a Video demonstrating the steps: 
https://www.youtube.com/watch?v=JimwOpN8dOU (sorry about my voice, I 
don't have a radio voice ;-) )


As others have pointed out, you can uses the different "Add Rectangle" 
modes in the "Shape Digitizing Toolbars", e.g. "Add Rectangle from 3 
points".


Hope this helps,

Andreas

On 2021-05-05 20:38, Gabriel Cotlier wrote:


Hello,

I'm digitizing a square using the advanced digitizing tool, however 
when I'm about to close the rectangle's last angle, the tool doesn't 
offer me to see how to close it with a perfect square angle at the last 
click. Thus cannot finish the figure as a perfect square (four 90 
degree angles).


How can I perform the square with the 4 perfect 90 degree angles using 
the digitizing tool?


Thanks a lot for your help.
Kind regards,
Gabriel

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Re: [Qgis-user] Shapefiles

[Andreas Neumann]

Hi Paddy,

The .shp file contains the geometries. If your data contains no 
geometries, then you might be fine with the .dbf file that contains the 
no-geometry part of your data (attribute columns). No - it is not 
possible to recreate the .shp file if it is missing.


Andreas

On 2021-04-08 14:07, Pat Brown wrote:


Hi,
So, just to confirm what I already suspect? If you have the .shx and 
.dbf files but the .shp file is missing then you might as well get rid 
of them? It is not possible to recreate the .shp file?


Thanks,

Paddy
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Re: [Qgis-user] WMS Image Projection

[Andreas Neumann]

Hi,

The approx 1.5m offset indicates that QGIS doesn't take a necessary 
grid-shift file into account. The grid-shift file is a separate file 
that defines the displacement vectors of coordinate systems with 
different datums.


As a European GIS user I am not comfortable with North-American CRS, but 
looking the two CRS up at epsg.io I can see that


http://epsg.io/?q=26910

vs

http://epsg.io/?q=3157

EPSG 26910 claims to have an accuracy of 4 m while EPSG 3157 claims to 
have an accuracy of 1m.


There might be a grid shift file necessary between the two CRS (I am 
personally unsure if that is the case here).


Since both, the project and the WMS are in the same CRS, I would assume 
that the offset problems occur with the parcel shapefile.


Do you know a local GIS expert in your region who knows if the 
transformation between EPSG 26910 and 3157 requires a grid-shift file? I 
would assume yes, because at epsg.io it indicates that the datums of the 
two CRS are slightly different: NAD83(CSRS) (http://epsg.io/4617) vs 
NAD83 (http://epsg.io/4269).


From there - and if we have a proper corresponding grid-shift file - we 
can help you set up the transformation in QGIS.


Greetings,

Andreas

On 2021-04-08 10:24, Springfield Harrison wrote:


Hi Andreas,

Thanks for the reply, I'll try to clarify:

* Version is 3.16.4

* The two municipal sources are being viewed in their own web windows 
and are displaying the same data


* They are the source of the property lines for my GIS (downloaded 
shapefile) and the orthophoto (WMS link, not resident TIFF or other)


* The property lines are EPSG:3157 - NAD83(CSRS) / UTM zone 10N - 
Projected, and from the municipal source.  I've attached the shapefile 
if you have the time.


* In QGIS, the ortho is loaded from the WMS source

* 
https://mapservices.crd.bc.ca/arcgis/services/OrthoImagery2019/MapServer/WMSserver

* EPSG:26910 - NAD83 / UTM zone 10N - Projected

* The project CRS is EPSG: 26910 but it doesn't seem to change anything 
by changing that or the source projections (at least within versions of 
NAD83 UTM Zone 10N)


* Thus, the same information displays differently online _versus_ in 
QGIS.


* The shift seems to be 1.5 m +/-, quite a lot for what I'm trying to 
do (building permit with tight setbacks).

* These are commonly used projections for our neck of the woods
* The two images I sent earlier depict the differences; in QGIS, 
earlier orthophotos show a similar or worse displacement.  Not so on 
the municipal web viewer.


* I've read up on projections in the tutorial and Help file, no 
revelations there, at least that I could see.


Thanks very much for any thoughts you may have.

-
Cheers, Spring

On 08/Apr/2021 00:47, Andreas Neumann wrote:

Hi,

Are there two different CRS involved here? Are the vectors (parcel 
boundaries) in a different CRS than the orthoimages? This might be a 
problem of a missing grid-shift file in QGIS.


It is also unclear for me if you load your Orthoimages locally (from 
tiff-files as well) or from WMS (or both) and only one of them is 
shifted?


Can you also add information what QGIS version with what proj version 
you use? You can find this information in the about dialogue in the 
help menu.


Greetings,

Andreas

On 2021-04-08 02:37, Springfield Harrison wrote:
Hello All,

Re obtaining orthophotos from a WMS server.

Locally we have orthophotos that can be brought into QGIS using the WMS 
service.  They are also viewable on the local government web map 
service.  In both cases I can compare them to the property lines which 
are from the same source.


On the government web pages (2), the orthophotos and the lot lines 
appear to coincide very well.  In QGIS, the same two layers are quite 
misaligned.


One would suspect a CRS problem but changing the CRS of the Project and 
the WMS image in QGIS has no effect.  Even followed the tutorial to no 
effect.


I'm attaching screen shots of the two results.  Ant thoughts would be 
appreciated, thank you . . . .


-
Cheers, Springfield Harrison

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Re: [Qgis-user] WMS Image Projection

[Andreas Neumann]

Hi,

Are there two different CRS involved here? Are the vectors (parcel 
boundaries) in a different CRS than the orthoimages? This might be a 
problem of a missing grid-shift file in QGIS.


It is also unclear for me if you load your Orthoimages locally (from 
tiff-files as well) or from WMS (or both) and only one of them is 
shifted?


Can you also add information what QGIS version with what proj version 
you use? You can find this information in the about dialogue in the help 
menu.


Greetings,

Andreas

On 2021-04-08 02:37, Springfield Harrison wrote:


Hello All,

Re obtaining orthophotos from a WMS server.

Locally we have orthophotos that can be brought into QGIS using the WMS 
service.  They are also viewable on the local government web map 
service.  In both cases I can compare them to the property lines which 
are from the same source.


On the government web pages (2), the orthophotos and the lot lines 
appear to coincide very well.  In QGIS, the same two layers are quite 
misaligned.


One would suspect a CRS problem but changing the CRS of the Project and 
the WMS image in QGIS has no effect.  Even followed the tutorial to no 
effect.


I'm attaching screen shots of the two results.  Ant thoughts would be 
appreciated, thank you . . . .


-
Cheers, Springfield Harrison

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Re: [Qgis-user] QGIS-Server Layer Order

[Andreas Neumann]

Hi Julierme,

The GetProjectSettings XML response provides an element called 
 where you can find the initial layer order of the 
QGIS project. Based on this, you can then formulate the GetMap request 
with the "LAYERS" parameter. The order you specify after LAYERS= defines 
the layer rendering order.


Greetings,

Andreas

On 2021-03-31 22:16, 1520 gis wrote:


Hi Andrea,

Did  you mean to add [1] LAYERDRAWINGORDER=... as a parameter in WMS 
request?


[1]  
OSM,biomas,ufe,rodovias,aerovias,rbmc,maregrafos,cbers4


Kind regards

Julierme

On Wed, Mar 31, 2021 at 2:13 PM 1520 gis 
 wrote:

Hi Andreas,

Thank you very much for your reply and help.

I appreciate it.

Kind regards

Julierme

On Wed, Mar 31, 2021 at 1:17 PM Andreas Neumann  
wrote:


Hi Julierme,

It is the client that requests a certain layer order, not the server. 
Unless you request a group layer/top level layer.


You find the information on the initial layer order in the 
GetProjectSettings response: 
https://docs.qgis.org/3.16/en/docs/server_manual/services.html#server-wms-getprojectsettings


The information of the GetProjectSettings response can be parsed by the 
client and used to generate an appropriate GetMap request with the 
correct layer order.


Hope this helps,

Andreas

On 2021-03-31 18:07, 1520 gis wrote:

Hi developers,

I have tried to change the QGIS-Server layer order using QGIS Desktop  
Layers Panel and L.TileLayer.WMS (Leaflet) zIndex options. None of them 
could change the layer order. It seems that QGIS-Server always serves 
from bottom to Top: raster images, polygons, lines and points by 
default. Is there any way to change these settings?


Kind regards

Julierme

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Re: [Qgis-user] QGIS-Server Layer Order

[Andreas Neumann]

Hi Julierme,

It is the client that requests a certain layer order, not the server. 
Unless you request a group layer/top level layer.


You find the information on the initial layer order in the 
GetProjectSettings response: 
https://docs.qgis.org/3.16/en/docs/server_manual/services.html#server-wms-getprojectsettings


The information of the GetProjectSettings response can be parsed by the 
client and used to generate an appropriate GetMap request with the 
correct layer order.


Hope this helps,

Andreas

On 2021-03-31 18:07, 1520 gis wrote:


Hi developers,

I have tried to change the QGIS-Server layer order using QGIS Desktop  
Layers Panel and L.TileLayer.WMS (Leaflet) zIndex options. None of them 
could change the layer order. It seems that QGIS-Server always serves 
from bottom to Top: raster images, polygons, lines and points by 
default. Is there any way to change these settings?


Kind regards

Julierme

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Re: [Qgis-user] Create circle with diameter in QGIS

[Andreas Neumann]

Ah - and don't forget that you need to finish the circle with the 
right-mouse button!


So the steps are (more or less):

- enable editing

- enable advanced digitizing tools (the button with square and ruler)

- enable the circle tool (e.g. "Add Circle by a Center Point and Another 
Point" tool)


- click in the canvas to set the circle center

- press "d" for distance and enter your radius (e.g. 5)

- press right mouse button to finish the circle

Hope this helps,

Andreas

On 2021-03-12 14:08, Andreas Neumann wrote:


Hi Madeline,

You need to enable the "Advanced Digitizing mode/panel". See 
https://docs.qgis.org/3.16/en/docs/user_manual/working_with_vector/editing_geometry_attributes.html#the-advanced-digitizing-panel 
for details.


The shortcut "d" (distance) is your friend. When this mode is activated 
you can enter distances (like your radius) with the keyboard and QGIS 
will constrain to these values.


You need to invest a bit of time to understand all the construction 
modes, but once you get it, it is quite powerful.


Greetings,

Andreas

On 2021-03-12 13:37, Madeline Krohn wrote:


Dear QGIS Team,

I would like to create a circle whose diameter is 75 metres. I am 
using QGIS version 3.16.3-Hannover.


My procedure so far has been like this:
1. create a new shapefile layer -> geometry type: polygon
2. in edit mode of this layer: add circle with centre and another 
point
--> How can I change the radius/diameter of the circle afterwards or 
is there another possibility to create a circle with diameter 
directly?


Thank you very much and best regards
Madeline

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Re: [Qgis-user] Create circle with diameter in QGIS

[Andreas Neumann]

Hi Madeline,

You need to enable the "Advanced Digitizing mode/panel". See 
https://docs.qgis.org/3.16/en/docs/user_manual/working_with_vector/editing_geometry_attributes.html#the-advanced-digitizing-panel 
for details.


The shortcut "d" (distance) is your friend. When this mode is activated 
you can enter distances (like your radius) with the keyboard and QGIS 
will constrain to these values.


You need to invest a bit of time to understand all the construction 
modes, but once you get it, it is quite powerful.


Greetings,

Andreas

On 2021-03-12 13:37, Madeline Krohn wrote:


Dear QGIS Team,

I would like to create a circle whose diameter is 75 metres. I am using 
QGIS version 3.16.3-Hannover.


My procedure so far has been like this:
1. create a new shapefile layer -> geometry type: polygon
2. in edit mode of this layer: add circle with centre and another point
--> How can I change the radius/diameter of the circle afterwards or is 
there another possibility to create a circle with diameter directly?


Thank you very much and best regards
Madeline

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Re: [Qgis-user] Symbol lines every km, moving when changing scale or moving map

[Andreas Neumann]

Hi Jérémie,

Ah good to hear!

I'm not a big fan of this fact that line simplification is turned on by 
default in QGIS. I believe that users should consciously turn it on if 
they want it!


Your example shows that it can lead to confusion (understandably).

Good that it works now. Note that you can override this setting on a per 
layer base in the layer properties - so not all layers need to have the 
same setting.


Greetings,

Andreas

On 2021-02-19 13:40, Prud'homme Jérémie wrote:


Hi,

I had simplification turned on, indeed...

I deactivated it :
- in the Options as you mention, so that it is deactivated for newly 
added layers

- in my layer options (Rendering properties)

And it is ok now.

It makes sense that if the line is simplified the distance vary !

Thanks Andreas.

Jérémie.

Le ven. 19 févr. 2021 à 11:12, Andreas Neumann  a 
écrit :


Hi Jérémie,

Do you have geometry simplification turned off? See "Settings" --> 
"Options" --> "Rendering" --> "Enable feature simplification ..."


Make sure this is deactivated (I think it is enabled by default).

Greetings,

Andreas

On 2021-02-19 11:05, Prud'homme Jérémie wrote:

Tested too fast :(

Behavior is ok when zooming in, but still problems when zooming out 
(whereas the entire feature is visible !).

See here : https://www.zupimages.net/viewer.php?id=21/07/ehlo.gif

Circles should follow the strokes generated with the tool "Points along 
geometry".


Jérémie.

Le ven. 19 févr. 2021 à 10:03, Prud'homme Jérémie  
a écrit :


Hi,

Thank you very much Nyall, this one was pretty well hidden.

With clipping unchecked, behavior is as expected for my use case.

Jérémie.

Le jeu. 18 févr. 2021 à 23:29, Nyall Dawson  a 
écrit : On Wed, 13 Jan 2021 at 06:33, Prud'homme Jérémie 
 wrote:


Hi,

I'm using QGIS 3.10.

I tried to use only symbology to display a stroke every km along a 
road.

The project CRS is 2154 (Lambert 93).

When adding a ""symbol line" with an interval of 1000 map units (meter 
for 2154) - or 1000 meters at scale, same result - I achieve to 
display symbols every km.


Problem is when I move the map or change scale, the symbols do not 
always stay in place. They are sometimes misplaced.


I've been told that problem can be that the first node of the line is 
not always the reference to calculate the intervals.


From the bottom of the symbol widget, click the "Advanced" button and
uncheck "Clip features to canvas extent".

Nyall



You can find a GIF here that displays my problem : 
https://zupimages.net/viewer.php?id=21/02/nvr2.gif


Circles are symbols via Symbology.
Strokes are symbos on points generated vith the tool "Points along 
geometry".


You can see that circles are not always at the same place as the 
strokes.


Is it a "normal" behavior ?
Anyway as a user I would expect that symbols are always generated at 
the same place from the starting node.


Thanks for your enlightments on this.

Jérémie.
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Re: [Qgis-user] Symbol lines every km, moving when changing scale or moving map

[Andreas Neumann]

Hi Jérémie,

Do you have geometry simplification turned off? See "Settings" --> 
"Options" --> "Rendering" --> "Enable feature simplification ..."


Make sure this is deactivated (I think it is enabled by default).

Greetings,

Andreas

On 2021-02-19 11:05, Prud'homme Jérémie wrote:


Tested too fast :(

Behavior is ok when zooming in, but still problems when zooming out 
(whereas the entire feature is visible !).

See here : https://www.zupimages.net/viewer.php?id=21/07/ehlo.gif

Circles should follow the strokes generated with the tool "Points along 
geometry".


Jérémie.

Le ven. 19 févr. 2021 à 10:03, Prud'homme Jérémie  
a écrit :


Hi,

Thank you very much Nyall, this one was pretty well hidden.

With clipping unchecked, behavior is as expected for my use case.

Jérémie.

Le jeu. 18 févr. 2021 à 23:29, Nyall Dawson  a 
écrit : On Wed, 13 Jan 2021 at 06:33, Prud'homme Jérémie 
 wrote:


Hi,

I'm using QGIS 3.10.

I tried to use only symbology to display a stroke every km along a 
road.

The project CRS is 2154 (Lambert 93).

When adding a ""symbol line" with an interval of 1000 map units (meter 
for 2154) - or 1000 meters at scale, same result - I achieve to 
display symbols every km.


Problem is when I move the map or change scale, the symbols do not 
always stay in place. They are sometimes misplaced.


I've been told that problem can be that the first node of the line is 
not always the reference to calculate the intervals.


From the bottom of the symbol widget, click the "Advanced" button and
uncheck "Clip features to canvas extent".

Nyall



You can find a GIF here that displays my problem : 
https://zupimages.net/viewer.php?id=21/02/nvr2.gif


Circles are symbols via Symbology.
Strokes are symbos on points generated vith the tool "Points along 
geometry".


You can see that circles are not always at the same place as the 
strokes.


Is it a "normal" behavior ?
Anyway as a user I would expect that symbols are always generated at 
the same place from the starting node.


Thanks for your enlightments on this.

Jérémie.
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Re: [Qgis-user] Georeferencing a DXF file

[Andreas Neumann]

Hi Richard,

On 2021-02-04 09:43, Richard Duivenvoorde wrote:


On 2/4/21 9:23 AM, Andreas Neumann wrote:

The same discussion also pops up in the Swiss and QGIS user group 
e-mail lists again and again and I believe it should be able to come 
up with funding, if some developer could take the lead on implementing 
this in QGIS core. I was hoping that Jürgen would be available to 
implement it, as he also did the DXF/DWG importer and it would make 
sense, that the DXF/DWG importer also integrates with a vector 
georeferencing solution.


Hi Andreas,

Sorry but I fail to see the dxf 'connection' :-). Would this not be a 
very generic vector tool, for example to be used by people who receive 
svg's or so or data which they do not know the crs of or


I agree that the vector georeferencing should also be possible for other 
non-dxf data, as a separate tool - but if done properly, both cases 
would be possible.
  The majority of the DXF files from architects and planners is 
typically not in the correct CRS coordinates. It is a very common case, 
having to fit the DXF data to the other GIS data (typical some form of 
cadastral data). In this case, it would be really, really nice if the 
DXF/DWG importer could already integrate the vector geoereferencing into 
the import process.


Also: this is very much about 'data quality', not sure if I would make 
QGIS be responsible for fixing data if people feed messy data into 
QGIS...?


Yes - but the reality is, that the majority of the DXF/DWG data is not 
using real-world CRS coordinates, but some local system.


Isn't it better to make the plugin just work (and also promote it a 
little, I never would have made the connection about 'vector 
georeferencing' and 'bender' ;-)


The vector bender should definitely serve as an inspiration for the core 
implementation, but I really think this needs to work in QGIS out of the 
box, without the need of installing plugins.


Plugins are often a major source of instability and frustration for QGIS 
users ... and they often fail to work in upcoming QGIS releases. This 
doesn't mean I don't appreciate the work of a plugin developer, in this 
particular case the work of the author of the "Vector Bender" plugin - 
the outcome and quality of plugins is often great - but once the 
functionality of a plugin becomes "mainstream" we should consider 
implementing the same thing in C++ in QGIS core.


Thanks for the discussion!

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Re: [Qgis-user] Georeferencing a DXF file

[Andreas Neumann]

Hi all,

If I may chime in:

this is a long-standing user wish - being able to georeference vector 
files in QGIS (in an easy way). This needs to go into core, not as a 
plugin that breaks with future QGIS releases or has dependency issues.


The same discussion also pops up in the Swiss and QGIS user group e-mail 
lists again and again and I believe it should be able to come up with 
funding, if some developer could take the lead on implementing this in 
QGIS core. I was hoping that Jürgen would be available to implement it, 
as he also did the DXF/DWG importer and it would make sense, that the 
DXF/DWG importer also integrates with a vector georeferencing solution.


Jürgen - would you be available to work on it? Or Alex?

Would someone be available to summarize the requirements and approaches 
in a QEP? I think this would help tremendously, writing down the 
requirements. Unfortunately, I don't have time currently to work on the 
QEP myself. But I will help to find funding to get this functionality 
into QGIS core.


Thanks,
Andreas

On 2021-02-03 20:10, Walt Ludwick wrote:

I've received a 3D AutoCAD file from an architect that i managed to 
convert into 2D .dxf format and import into my QGIS project, but it is 
out-of-scale and out-of-place, so i guess i need to add some 
georeferencing coordinates to the file.


This should be easy enough, since it's an accurate representation of a 
building that's already in the project -with an additional wing tacked 
on- so i'm thinking i could just use a few corners of that existing 
buildings as ground control points, and map them to the corresponding 
corners on this .dxf model, then maybe all other co-ordinates could be 
automatically generated by some tool, if i could just find the right 
one for the job.


Is there in fact any such easy way to do this thing?
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Re: [Qgis-user] Control symbol rendering in a way similar to label collision?

[Andreas Neumann]

Hi Cory,

Perhaps not exactly what you want - but did you also look at the point 
cluster renderer?


If you use that, points are clustered at small map scales, but are shown 
individually if you zoom in further.


It might help a bit in your situation.

Andreas

On 2021-02-02 17:20, Cory Albrecht wrote:


Hello all,

I am looking for a way to control symbol rendering in a way similar to 
how labels are omitted ot not to prevent collision.


I want to use the GeoNames data to populating cities, towns, etc... on 
my maps, but there are still millions of points even after filtering 
for populated places. This is what a section of the map from 
Dakotas/Montana/Wyoming looks like now, with a confused mess of 
overlapping symbols. It's worse on the coasts. BTW, this layer is a 
points layer.


First I thought maybe Scale-based rendering by population size, but 
that doesn't work, because farther out zoom levels there'd still be a 
mess of overlapping symbols in heavily populated places like NYC or LA, 
and in less populated places the smaller cities and towns that are 
important wouldn't even show (like that black dot, which is Rapid City, 
SD) even though there would be plenty of room for them.


I can control the rendering order based on population size, so is there 
a way to control whether a not a symbol gets rendered based on what has 
already been drawn, but ignoring what has yet to be rendered?


I'm imagining a set of stops similar to this:

* iterate through all items in order of the population attribute
* get the current item's location where it would potentially be 
rendered on the map
* has anything been rendered already within 5mm (or whatever) of that 
location?

* if yes, go to next item without rendering this one
* if no, then render it's symbol
* continue to next item

So after that dot which is Rapid City gets rendered, but then those 
overlapping circles do not until you finally get to one with a centre 
5mm away from the centre of the Rapid City dot.


While googling I found the refFunctions plugin which adds some 
functions dealing with overlaps, but since the layer is composed of 
points, nothing really overlaps. Also, adding something like `_...AND 
(population >= array_max(geomoverlaps('cities','population')))_` to a 
rule in Symbology to exclude/include things for rendering looks at 
everything without distinguishing between already rendered and yet to 
be rendered, like I need.


Am I thinking about this wrong and am thus missing something obvious? I 
know I only use a small portion of QGIS's capabilites, so maybe there's 
a tool/capability I haven't discovered yet because I haven't needed it 
until now?


The layer is a PostGIS layer and this would seem to be a wholly QGIS 
problem, but maybe I am wrong on that, too? Maybe there's a way of 
passing the map scale in the SQL query ('SELECT *, 1.0 as map_scale 
FROM...') so that some weird WHERE clause would do the filtering there? 
That seems unlikely and a bit crazy, but who knows?


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Re: [Qgis-user] FW: Re: Place feature label in one location during Temporal Animation - QGIS 3.16.1 - Windows 10

[Andreas Neumann]

Hi Brent, 


There is something called "Decorations" in QGIS where you can have
dynamic HTML content. 


See https://anitagraser.com/2020/12/05/dashboards-in-qgis/ with a video
from Tim Sutton showing how to do dashboards in QGIS with decorations. 

Andreas 


On 2020-12-22 20:11, Brent Robertson wrote:

Hi, 

I have an animation of an aircraft undertaking aerial topdressing (crop dusting).  I have it moving across time and showing it spreading fertiliser. 

What I am wanting to do is display the current air speed, which I can do as an offset to the aircraft position but I am wanting the air speed to be in one position within my map ie offset form the left lower corner.  Would be good to create some sort of dashboard showing air speed & altitude but would be happy with just being able to get a label showing in a single location. 

I have tried to set the location using the geometry generator, which doesn't work for me. Only using '$geometry' shows the label but changing to ' @map_extent_center ' my labels disappear. 

Also, tried to set as x & y under "Date defined" as for "Position (X)" as 'x(@map_extent_center)' and for "Position (Y)" as 'y(@map_extent_center)' but QGIS crashes. 

Any help would be appreciated. 

Thanks, 

Brent 


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Re: [Qgis-user] Condition in QGIS modeler

[Andreas Neumann]

Yes. 


See
https://www.qgis.org/en/site/forusers/visualchangelog314/index.html#feature-new-modeler-algorithm-for-creating-conditional-branches


There is also a "Feature Filter" that can have an expression and can be
connected to different other algorithms. 

Greetings, 

Andreas 


On 2020-12-08 09:35, Marc Yeranosyan wrote:

Hi user list, 

Is the "conditional branch" work for in Qgis 3.14, I can't find it in Modeler. 
If not, is it possible to create a condition in the modeler processing algorithm? 

Thank You in advance 
Marc 
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Re: [Qgis-user] transfer single points from one point-layer to another?

[Andreas Neumann]

Hi Stef,

Yes, possible. But: data is independent of project. So you basically copy
data from one database or file to another one - regardless of the projects
referencing these data sources. So other projects linking to the same
database or file will also see the updates.

[image: grafik.png]

First, select objects in one layer, then press "copy", then make the other
layer active and press "paste".

Andreas



On Mon, 7 Dec 2020 at 12:43, ent-ar...@gmx.de  wrote:

> Hello list :-)
>
> is it possible to transfer a certain amount of points from one project
> to another?
> Together with all the informations?
>
> Many regards,
> Stef
>
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Re: [Qgis-user] Problème de composeur / Print composer problem

[Andreas Neumann]

Hi Adelin,

Somehow you don't seem to have a page in your layout. Can you try in the
"Layout" menu --> "Add Pages" to add a page? Or create a new layout.

I don't know how you managed to remove the last page in a layout. I tried,
but couldn't ... or maybe it is some bug in QGIS. But it never occurred to
me that all pages have been removed.

Hope this helps,
Andreas

On Tue, 24 Nov 2020 at 10:56, adelin collette 
wrote:

> Bonjour,
>
>
>
> J’ai un problème avec l’édition du composeur sous QGIS 3.4.15. Quand mon
> composeur d’impression s’ouvre, je n’ai accès à aucun bouton, ils sont tous
> grisés… (voir photo) Je ne peux donc rien faire…
>
> Auriez-vous une idée pour régler le problème ?
>
>
>
> Merci d’avance,
>
>
>
> Adelin
>
>
>
> Hello,
>
>
>
> I have a problem with the composer edition under QGIS 3.4.15. When my
> print composer opens, I don't have access to any buttons, they are all
> greyed out ... (see photo) So I can't do anything ...
>
> Do you have an idea to solve the problem?
>
>
>
> Thank you in advance,
>
>
>
> Adelin
>
>
>
>
>
>
>
>
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Re: [Qgis-user] QGIS donation receipt

[Andreas Neumann]

Hi,

I will help Erich with his receipt.

Andreas Neumann
QGIS.ORG treasurer

On Thu, 19 Nov 2020 at 19:43, Erich Purpur  wrote:

> Hello,
>
> I made a donation to QGIS.org to support the project, as requested during
> the QGIS North America online conference this year.  I am being asked by my
> employer to provide proof of this, which I have not been able to find in my
> emails.
>
> Does anyone know who at the QGIS team I should contact in order to get a
> record of this donation?
>
> Thank you for any information,
>
> Erich Purpur
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Re: [Qgis-user] Add Layer Search to Toolbar

[Andreas Neumann]

QGIS allows you to setup relations between different data sources. But 
of course you need common keys to link the tables.


So you could have a relation between a Oracle DB and a CSV file. But you 
need to setup this relation with the foreign key manually in menu 
"Project" --> "Properties" --> "Relations".


Once you've set up these relations you can use the relation reference 
widgets in the forms.


Andreas

Am 13.11.20 um 17:33 schrieb L.W.:

thats true, but i need to add the foreign key to work with this relation.


Am 13.11.2020 um 17:10 schrieb Andreas Neumann:

Hi,

To me this sounds like you want to set up a relation and define forms
with relation reference and relation widgets (with or without embedded
forms).

In the project settings you can define relations between tables and
once you have defined them, they appear in the forms section of the
involved layers.

But as others have pointed out, you probably want (or need) a proper
database, like PostgreSQL. If you have setup your relations in this
database, QGIS will autodetect them and you can directly use them in
your forms.

Greetings,

Andreas


Am 13.11.20 um 16:58 schrieb L.W.:

Use-Case:

I add a Point on map, the attribute-editor opens and I give some Data
to it.

want-to-have:

I want to add a foreign-Key id, but can not add a search-form in this
gui. so my idea was to search in the foreign table with a search-term
and get the id of the found row.

with this id I can add the new point.


my biggest problem, I do not like python as much ... I can write
'python' but none line of code ;-)


Am 13.11.2020 um 16:52 schrieb Richard Duivenvoorde:

Please describe your use-case more specific.

What is the end result you want:
- a location?
- a value of a record (but not the one you search for?

Can you use the filter function in the table? And maybe dock the
table as a dockwidget?
Can you implement a 'locator' yourself (python coding)?
Or else write a small plugin for this?

Regards,

Richard

On 11/13/20 4:43 PM, L.W. wrote:

and this is the point:

"With f @columname you search in the values of 'columname' in current
active layer"

I do want to search every time independant of the active layer ... 
and

the search-field is not the result-field I need.


Am 13.11.2020 um 16:37 schrieb Richard Duivenvoorde:

Have a look in the settings/configure (right mouse context in the
locator bar).

With f ... you search in current active layer
With f @columname you search in the values of 'columname' in
current active layer

(same with 'af' but then for all layers)
See
https://docs.qgis.org/3.16/en/docs/user_manual/introduction/qgis_configuration.html#locator-settings 



Hope this helps

Regards,

Richard Duivenvoorde

On 11/13/20 4:30 PM, L.W. wrote:

no, I have never used it, but, there are a hugh list of layers in
my project and it seemed that I can not search in a specific layer.

I only need result of one field displayed in a text field.


Am 13.11.2020 um 16:24 schrieb Jorge Gustavo Rocha:

Hi L.W.,

You already have a search toolbar, at the lower left corner.
There are several search options. Have you tried them?

Regards,

Jorge Gustavo

Às 14:39 de 13/11/20, L.W. escreveu:

Hi,

is there a default option / way to have a textfield for
searching in a
layer at the toolbar (or dock-window)? Ill like to get the
"fieldname"-value of the found dataset / attribute.

regards


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Re: [Qgis-user] Add Layer Search to Toolbar

[Andreas Neumann]

Hi,

To me this sounds like you want to set up a relation and define forms 
with relation reference and relation widgets (with or without embedded 
forms).


In the project settings you can define relations between tables and once 
you have defined them, they appear in the forms section of the involved 
layers.


But as others have pointed out, you probably want (or need) a proper 
database, like PostgreSQL. If you have setup your relations in this 
database, QGIS will autodetect them and you can directly use them in 
your forms.


Greetings,

Andreas


Am 13.11.20 um 16:58 schrieb L.W.:

Use-Case:

I add a Point on map, the attribute-editor opens and I give some Data 
to it.


want-to-have:

I want to add a foreign-Key id, but can not add a search-form in this
gui. so my idea was to search in the foreign table with a search-term
and get the id of the found row.

with this id I can add the new point.


my biggest problem, I do not like python as much ... I can write
'python' but none line of code ;-)


Am 13.11.2020 um 16:52 schrieb Richard Duivenvoorde:

Please describe your use-case more specific.

What is the end result you want:
- a location?
- a value of a record (but not the one you search for?

Can you use the filter function in the table? And maybe dock the 
table as a dockwidget?

Can you implement a 'locator' yourself (python coding)?
Or else write a small plugin for this?

Regards,

Richard

On 11/13/20 4:43 PM, L.W. wrote:

and this is the point:

"With f @columname you search in the values of 'columname' in current
active layer"

I do want to search every time independant of the active layer ... and
the search-field is not the result-field I need.


Am 13.11.2020 um 16:37 schrieb Richard Duivenvoorde:
Have a look in the settings/configure (right mouse context in the 
locator bar).


With f ... you search in current active layer
With f @columname you search in the values of 'columname' in 
current active layer


(same with 'af' but then for all layers)
See 
https://docs.qgis.org/3.16/en/docs/user_manual/introduction/qgis_configuration.html#locator-settings


Hope this helps

Regards,

Richard Duivenvoorde

On 11/13/20 4:30 PM, L.W. wrote:
no, I have never used it, but, there are a hugh list of layers in 
my project and it seemed that I can not search in a specific layer.


I only need result of one field displayed in a text field.


Am 13.11.2020 um 16:24 schrieb Jorge Gustavo Rocha:

Hi L.W.,

You already have a search toolbar, at the lower left corner. 
There are several search options. Have you tried them?


Regards,

Jorge Gustavo

Às 14:39 de 13/11/20, L.W. escreveu:

Hi,

is there a default option / way to have a textfield for 
searching in a

layer at the toolbar (or dock-window)? Ill like to get the
"fieldname"-value of the found dataset / attribute.

regards


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Re: [Qgis-user] Dynamic Line

[Andreas Neumann]

Hi Nicolas,

Yes - but that doesn't magically turn a "non geometry" table into a 
"geometry table" - as far as I know. So you probably need to create a 
"Virtual Layer" and create the geometry similar to what you propose.


Andreas

Am 13.11.20 um 15:22 schrieb Nicolas Cadieux:

Hi,
You can create a geometry from WKT if you have x and y fields using 
and expression in the field calculator.

|geom_from_wkt('POINT('||"x"||' '||"y"||')')|

https://en.wikipedia.org/wiki/Well-known_text_representation_of_geometry

Nicolas Cadieux


Le 13 nov. 2020 à 09:07, Andreas Neumann  a écrit :



Hi

Neither GeometryGenerators nor Vector Field Markers work on tables 
without geometry, unfortunately. You didn't inform us, that you don't 
have geometry in your table.


You can, however, create a "Virtual Layer" and write some SQL to 
create a geometry from your attributes: menu "Layer" --> "Create 
Layer" --> "New Virtual Layer" - where you can use your existing 
tables and create a new geometry column with SQL. See 
https://docs.qgis.org/testing/en/docs/user_manual/managing_data_source/create_layers.html#creating-virtual-layers


Or, if your table is a CSV file, then you can assign attribute 
columns to a point geometry and then just hide the point rendering if 
you don't need it.


This is an unfortunate limitation of QGIS, that there is no "easy" 
way to add a geometry column to table that doesn't have geometry (or 
if it is possible, then I don't know it).


Hope this helps you,

Andreas

Am 13.11.20 um 14:52 schrieb L.W.:


Does it works on Layers with no geometry?

My layers do not have a geometry.


Am 13.11.2020 um 11:56 schrieb Andreas Neumann:


Yes, you need point data to start from, but then vectors can 
bei/are generated from the attributes you mentioned.


Andreas

Am 13.11.20 um 11:47 schrieb L.W.:


from the docs ...

It can only be used to render point data


12.2.2.2.6.The Vector Field Marker

<https://docs.qgis.org/3.10/en/docs/user_manual/style_library/symbol_selector.html?#id15>

The vector field marker is used to display vector field data such 
as earth deformation, tidal flows, and the like. It displays the 
vectors as lines (preferably arrows) that are scaled and oriented 
according to selected attributes of data points. It can only 
be used to render point data; line and polygon layers are not 
drawn by this symbology.


The vector field is defined by attributes in the data, which can 
represent the field either by:


 *

*cartesian*components (|x|and|y|components of the field)

 *

or*polar*coordinates: in this case, attributes
define|Length|and|Angle|. The angle may be measured either
clockwise from north, or Counterclockwise from east, and may
be either in degrees or radians.

 *

or as*height only*data, which displays a vertical arrow scaled
using an attribute of the data. This is appropriate for
displaying the vertical component of deformation, for example.

The magnitude of field


Am 13.11.2020 um 11:34 schrieb Andreas Neumann:

Or even easier: use the "Vector Field Marker":

https://docs.qgis.org/3.10/en/docs/user_manual/style_library/symbol_selector.html?#the-vector-field-marker 



Am 13.11.20 um 11:33 schrieb Andreas Neumann:

Hi,

Yes - you can use Geometry Generators for that. Use the 
make_point() and make_line() expressions for that.


See 
https://docs.qgis.org/3.10/en/docs/user_manual/style_library/symbol_selector.html?highlight=geometry%20generator#the-geometry-generator


Greetings,
Andreas

Am 13.11.20 um 11:26 schrieb L.W.:

Hi,

is it possible to draw automatically a line between two points 
defined

by 4 fields (x1,y1 - x2,y2) in an attributetable?

but I do not want to add a line-layer based on this table nor 
want to

draw the line by hand.

thanks

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Re: [Qgis-user] Dynamic Line

[Andreas Neumann]

Hi

Neither GeometryGenerators nor Vector Field Markers work on tables 
without geometry, unfortunately. You didn't inform us, that you don't 
have geometry in your table.


You can, however, create a "Virtual Layer" and write some SQL to create 
a geometry from your attributes: menu "Layer" --> "Create Layer" --> 
"New Virtual Layer" - where you can use your existing tables and create 
a new geometry column with SQL. See 
https://docs.qgis.org/testing/en/docs/user_manual/managing_data_source/create_layers.html#creating-virtual-layers


Or, if your table is a CSV file, then you can assign attribute columns 
to a point geometry and then just hide the point rendering if you don't 
need it.


This is an unfortunate limitation of QGIS, that there is no "easy" way 
to add a geometry column to table that doesn't have geometry (or if it 
is possible, then I don't know it).


Hope this helps you,

Andreas

Am 13.11.20 um 14:52 schrieb L.W.:


Does it works on Layers with no geometry?

My layers do not have a geometry.


Am 13.11.2020 um 11:56 schrieb Andreas Neumann:


Yes, you need point data to start from, but then vectors can bei/are 
generated from the attributes you mentioned.


Andreas

Am 13.11.20 um 11:47 schrieb L.W.:


from the docs ...

It can only be used to render point data


12.2.2.2.6.The Vector Field Marker

<https://docs.qgis.org/3.10/en/docs/user_manual/style_library/symbol_selector.html?#id15>

The vector field marker is used to display vector field data such as 
earth deformation, tidal flows, and the like. It displays the 
vectors as lines (preferably arrows) that are scaled and oriented 
according to selected attributes of data points. It can only be 
used to render point data; line and polygon layers are not drawn 
by this symbology.


The vector field is defined by attributes in the data, which can 
represent the field either by:


 *

*cartesian*components (|x|and|y|components of the field)

 *

or*polar*coordinates: in this case, attributes
define|Length|and|Angle|. The angle may be measured either
clockwise from north, or Counterclockwise from east, and may be
either in degrees or radians.

 *

or as*height only*data, which displays a vertical arrow scaled
using an attribute of the data. This is appropriate for
displaying the vertical component of deformation, for example.

The magnitude of field


Am 13.11.2020 um 11:34 schrieb Andreas Neumann:

Or even easier: use the "Vector Field Marker":

https://docs.qgis.org/3.10/en/docs/user_manual/style_library/symbol_selector.html?#the-vector-field-marker 



Am 13.11.20 um 11:33 schrieb Andreas Neumann:

Hi,

Yes - you can use Geometry Generators for that. Use the 
make_point() and make_line() expressions for that.


See 
https://docs.qgis.org/3.10/en/docs/user_manual/style_library/symbol_selector.html?highlight=geometry%20generator#the-geometry-generator


Greetings,
Andreas

Am 13.11.20 um 11:26 schrieb L.W.:

Hi,

is it possible to draw automatically a line between two points 
defined

by 4 fields (x1,y1 - x2,y2) in an attributetable?

but I do not want to add a line-layer based on this table nor 
want to

draw the line by hand.

thanks

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Re: [Qgis-user] Dynamic Line

[Andreas Neumann]

Yes, you need point data to start from, but then vectors can bei/are 
generated from the attributes you mentioned.


Andreas

Am 13.11.20 um 11:47 schrieb L.W.:


from the docs ...

It can only be used to render point data


12.2.2.2.6.The Vector Field Marker

<https://docs.qgis.org/3.10/en/docs/user_manual/style_library/symbol_selector.html?#id15>

The vector field marker is used to display vector field data such as 
earth deformation, tidal flows, and the like. It displays the vectors 
as lines (preferably arrows) that are scaled and oriented according to 
selected attributes of data points. It can only be used to render 
point data; line and polygon layers are not drawn by this symbology.


The vector field is defined by attributes in the data, which can 
represent the field either by:


 *

*cartesian*components (|x|and|y|components of the field)

 *

or*polar*coordinates: in this case, attributes
define|Length|and|Angle|. The angle may be measured either
clockwise from north, or Counterclockwise from east, and may be
either in degrees or radians.

 *

or as*height only*data, which displays a vertical arrow scaled
using an attribute of the data. This is appropriate for displaying
the vertical component of deformation, for example.

The magnitude of field


Am 13.11.2020 um 11:34 schrieb Andreas Neumann:

Or even easier: use the "Vector Field Marker":

https://docs.qgis.org/3.10/en/docs/user_manual/style_library/symbol_selector.html?#the-vector-field-marker 



Am 13.11.20 um 11:33 schrieb Andreas Neumann:

Hi,

Yes - you can use Geometry Generators for that. Use the make_point() 
and make_line() expressions for that.


See 
https://docs.qgis.org/3.10/en/docs/user_manual/style_library/symbol_selector.html?highlight=geometry%20generator#the-geometry-generator


Greetings,
Andreas

Am 13.11.20 um 11:26 schrieb L.W.:

Hi,

is it possible to draw automatically a line between two points defined
by 4 fields (x1,y1 - x2,y2) in an attributetable?

but I do not want to add a line-layer based on this table nor want to
draw the line by hand.

thanks

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Re: [Qgis-user] Dynamic Line

[Andreas Neumann]

Or even easier: use the "Vector Field Marker":

https://docs.qgis.org/3.10/en/docs/user_manual/style_library/symbol_selector.html?#the-vector-field-marker

Am 13.11.20 um 11:33 schrieb Andreas Neumann:

Hi,

Yes - you can use Geometry Generators for that. Use the make_point() 
and make_line() expressions for that.


See 
https://docs.qgis.org/3.10/en/docs/user_manual/style_library/symbol_selector.html?highlight=geometry%20generator#the-geometry-generator


Greetings,
Andreas

Am 13.11.20 um 11:26 schrieb L.W.:

Hi,

is it possible to draw automatically a line between two points defined
by 4 fields (x1,y1 - x2,y2) in an attributetable?

but I do not want to add a line-layer based on this table nor want to
draw the line by hand.

thanks

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Re: [Qgis-user] Dynamic Line

[Andreas Neumann]

Hi,

Yes - you can use Geometry Generators for that. Use the make_point() and 
make_line() expressions for that.


See 
https://docs.qgis.org/3.10/en/docs/user_manual/style_library/symbol_selector.html?highlight=geometry%20generator#the-geometry-generator


Greetings,
Andreas

Am 13.11.20 um 11:26 schrieb L.W.:

Hi,

is it possible to draw automatically a line between two points defined
by 4 fields (x1,y1 - x2,y2) in an attributetable?

but I do not want to add a line-layer based on this table nor want to
draw the line by hand.

thanks

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[Qgis-user] Online QGIS user meeting with focus on QGIS server, QGIS web clients, mobile and sync solutions

[Andreas Neumann]

Dear QGIS-Users,

On the morning of Tue Nov 24th the Swiss QGIS user group organizes a user
meeting around the topics QGIS Server, QGIS Web Clients, mobile and sync
solutions. Presentations will be in English.

It will be an online meeting and you are all welcome to join. You can find
the schedule at
https://www.qgis.ch/en/association/user-meetings/user-meeting-online-autumn-2020.
If you are interested, please register at
https://www.edudip.com/de/webinar/swiss-qgis-user-meeting-online-autumn-2020/530082

Looking forward to meeting you soon!

Greetings,
Andreas

--
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Re: [Qgis-user] Keeping layers of an imported DXF file into QGIS

[Andreas Neumann]

Just confirmed to Luc that his dxf file imports just fine (both in 2D and
3D) and with layers.

Andreas

On Mon, 9 Nov 2020 at 17:12, Nicolas Cadieux 
wrote:

> Hi,
>
> I will set others respond as I am currently updating my laptop to Linux. I
> only expect to have a working version of QGIS later today.
>
> Being a spelunker in Montreal, I would like to volunteer for futur mapping
> project. Contact me directly if you need help.
>
> Nicolas Cadieux
>
> > Le 9 nov. 2020 à 10:33, Luc Le Blanc  a écrit :
> >
> > DXF file shared.
> >
> > I'm forwarding answers to my user.
> >
> >> Le lun. 9 nov. 2020 à 10:25, Andreas Neumann  a
> écrit :
> >>
> >> Hi Luc,
> >>
> >> Can you share such a dxf with me?
> >>
> >> As just written in my other mail (seconds ago), please also try the
> native way of importing the DXF to a Geopackage through menu "Project -->
> Import/Export --> Import Layers from DWG/DXF"
> >>
> >> Andreas
> >>
> >>> On Mon, 9 Nov 2020 at 16:03, Luc Le Blanc  wrote:
> >>>
> >>> That's our impression too, as QGIS ends up with (3) layers of shapes,
> >>> lines and text. The problem is that this line layer is a bulk merge of
> >>> several DXF layers representing different things (line plot, passage
> >>> widths, walls, etc.) that the user would like to toggle (hide/show) or
> >>> even exclude from the import. Just knowing the layer of origin is not
> >>> sufficient. Can QGIS act upon these attributes other than just showing
> >>> them? (I'm not a QGIS user, just researching for an Auriga user who
> >>> asked me).
> >>>
> >>>
> >>> Le lun. 9 nov. 2020 à 09:43, Charles Dixon-Paver 
> a écrit :
> >>>>
> >>>> I think the DXF is just split by geometry type, but you should be
> able to access the "layer" information via the attributes.
> >>>>
> >>>> On Mon, 9 Nov 2020 at 16:24, Luc Le Blanc 
> wrote:
> >>>>>
> >>>>> Hi,
> >>>>>
> >>>>> My cave survey freeware exports DXF files organized in multiple
> layers
> >>>>> for survey stations, station names, line plot, wall lines, etc.
> >>>>>
> >>>>> A user tells me that when he imports this DXF into QGIS, everything
> >>>>> gets merged into 3 layers containing station markers (small
> >>>>> triangles). lines (line plot, passage widths, walls, altogether) and
> >>>>> station names.
> >>>>>
> >>>>> Is it possible for QGIS to neatly import a layered DXF file into
> >>>>> corresponding layers, respecting the initial organization?
> >>>>>
> >>>>>
> >>>>> --
> >>>>> Luc Le Blanc
> >>>>> http://www.speleo.qc.ca/Auriga
> >>>>> ___
> >>>>> 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
> >>>
> >>>
> >>>
> >>> --
> >>> Luc Le Blanc
> >>> http://www.speleo.qc.ca/Auriga
> >>> ___
> >>> 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
> >>
> >>
> >>
> >> --
> >>
> >> --
> >> Andreas Neumann
> >> QGIS.ORG board member (treasurer)
> >
> >
> >
> > --
> > Luc Le Blanc
> > http://www.speleo.qc.ca/Auriga
> > ___
> > Qgis-user mailing list
> > Qgis-user@lists.osgeo.org
> > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
> > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>


-- 

--
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Re: [Qgis-user] Keeping layers of an imported DXF file into QGIS

[Andreas Neumann]

See
https://docs.qgis.org/3.16/en/docs/user_manual/managing_data_source/opening_data.html#importing-a-dxf-or-dwg-file
for the QGIS native way to import DXF, which also keeps the original layer
structure.

Andreas

On Mon, 9 Nov 2020 at 16:25, Andreas Neumann  wrote:

> Hi Luc,
>
> Can you share such a dxf with me?
>
> As just written in my other mail (seconds ago), please also try the native
> way of importing the DXF to a Geopackage through menu "Project -->
> Import/Export --> Import Layers from DWG/DXF"
>
> Andreas
>
> On Mon, 9 Nov 2020 at 16:03, Luc Le Blanc  wrote:
>
>> That's our impression too, as QGIS ends up with (3) layers of shapes,
>> lines and text. The problem is that this line layer is a bulk merge of
>> several DXF layers representing different things (line plot, passage
>> widths, walls, etc.) that the user would like to toggle (hide/show) or
>> even exclude from the import. Just knowing the layer of origin is not
>> sufficient. Can QGIS act upon these attributes other than just showing
>> them? (I'm not a QGIS user, just researching for an Auriga user who
>> asked me).
>>
>>
>> Le lun. 9 nov. 2020 à 09:43, Charles Dixon-Paver  a
>> écrit :
>> >
>> > I think the DXF is just split by geometry type, but you should be able
>> to access the "layer" information via the attributes.
>> >
>> > On Mon, 9 Nov 2020 at 16:24, Luc Le Blanc  wrote:
>> >>
>> >> Hi,
>> >>
>> >> My cave survey freeware exports DXF files organized in multiple layers
>> >> for survey stations, station names, line plot, wall lines, etc.
>> >>
>> >> A user tells me that when he imports this DXF into QGIS, everything
>> >> gets merged into 3 layers containing station markers (small
>> >> triangles). lines (line plot, passage widths, walls, altogether) and
>> >> station names.
>> >>
>> >> Is it possible for QGIS to neatly import a layered DXF file into
>> >> corresponding layers, respecting the initial organization?
>> >>
>> >>
>> >> --
>> >> Luc Le Blanc
>> >> http://www.speleo.qc.ca/Auriga
>> >> ___
>> >> 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
>>
>>
>>
>> --
>> Luc Le Blanc
>> http://www.speleo.qc.ca/Auriga
>> ___
>> 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
>
>
>
> --
>
> --
> Andreas Neumann
> QGIS.ORG board member (treasurer)
>


-- 

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Re: [Qgis-user] Keeping layers of an imported DXF file into QGIS

[Andreas Neumann]

Hi Luc,

Can you share such a dxf with me?

As just written in my other mail (seconds ago), please also try the native
way of importing the DXF to a Geopackage through menu "Project -->
Import/Export --> Import Layers from DWG/DXF"

Andreas

On Mon, 9 Nov 2020 at 16:03, Luc Le Blanc  wrote:

> That's our impression too, as QGIS ends up with (3) layers of shapes,
> lines and text. The problem is that this line layer is a bulk merge of
> several DXF layers representing different things (line plot, passage
> widths, walls, etc.) that the user would like to toggle (hide/show) or
> even exclude from the import. Just knowing the layer of origin is not
> sufficient. Can QGIS act upon these attributes other than just showing
> them? (I'm not a QGIS user, just researching for an Auriga user who
> asked me).
>
>
> Le lun. 9 nov. 2020 à 09:43, Charles Dixon-Paver  a
> écrit :
> >
> > I think the DXF is just split by geometry type, but you should be able
> to access the "layer" information via the attributes.
> >
> > On Mon, 9 Nov 2020 at 16:24, Luc Le Blanc  wrote:
> >>
> >> Hi,
> >>
> >> My cave survey freeware exports DXF files organized in multiple layers
> >> for survey stations, station names, line plot, wall lines, etc.
> >>
> >> A user tells me that when he imports this DXF into QGIS, everything
> >> gets merged into 3 layers containing station markers (small
> >> triangles). lines (line plot, passage widths, walls, altogether) and
> >> station names.
> >>
> >> Is it possible for QGIS to neatly import a layered DXF file into
> >> corresponding layers, respecting the initial organization?
> >>
> >>
> >> --
> >> Luc Le Blanc
> >> http://www.speleo.qc.ca/Auriga
> >> ___
> >> 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
>
>
>
> --
> Luc Le Blanc
> http://www.speleo.qc.ca/Auriga
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Re: [Qgis-user] Keeping layers of an imported DXF file into QGIS

[Andreas Neumann]

Hi Luc,

QGIS has two ways of importing/exporting DXF:


   - the native QGIS way (uses the libdxfrw library and can be accessed in
   QGIS through menu "Project --> Import/Export --> Import Layers from
   DWG/DXF")
   - and through the OGR library (using the menu Layer --> Add Layer -->
   Add Vector Layer)

Drag and Drop of the DXF file from the file manager to QGIS uses the OGR
method, btw.

Both approaches read 3D data perfectly fine and the 3D data can be used in
3D views in QGIS - so absolutely no need to go through Blender, unless you
want to create renderings there.

The QGIS native way imports the original DXF layers into separate QGIS
layers, but will separate out by geometry type, the OGR way imports all
similar geometry types into a single table, but the table contains the
original DXF layer name and you can filter and style your data using the
layer name attributes. Note that in QGIS a category or symbology rule can
also be toggled, so it almost acts like a "layer" - you can switch on/off a
category or symbology rule.

Both approaches co-exist and have their advantages/disadvantages, but in
general, the native QGIS way is the better way to import your DXF - and it
will keep your layers. However, the QGIS native way imports the DXF into a
Geopackage and then the data is actually a copy of the DXF file, while the
OGR way is a "live" access to your DXF file, so any changes in the DXF are
also seen in QGIS, while with the native import, you'll have to re-import
your DXF file.

Personally, I always always prefer the native way with the import, with the
drawback that you have to remove and re-add the file after you have changes
in the DXF file. But I recommend you to try both options and see which of
the two works better for you.

Hope this helps,

Andreas

On Mon, 9 Nov 2020 at 15:24, Luc Le Blanc  wrote:

> Hi,
>
> My cave survey freeware exports DXF files organized in multiple layers
> for survey stations, station names, line plot, wall lines, etc.
>
> A user tells me that when he imports this DXF into QGIS, everything
> gets merged into 3 layers containing station markers (small
> triangles). lines (line plot, passage widths, walls, altogether) and
> station names.
>
> Is it possible for QGIS to neatly import a layered DXF file into
> corresponding layers, respecting the initial organization?
>
>
> --
> Luc Le Blanc
> http://www.speleo.qc.ca/Auriga
> ___
> Qgis-user mailing list
> Qgis-user@lists.osgeo.org
> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
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Re: [Qgis-user] QGIS training certification

[Andreas Neumann]

Hi,

Please start at https://qgis.org/en/site/getinvolved/certification.html

Yes, we have training certificates - organizations and companies 
offering these certificates need to submit their training material for 
review. After acceptance, the accepted organization/company can register 
their courses and attendees and generate the certificates. With a unique 
certification number, it can be checked when the attendee participated 
in which course.


If you have any questions about the certification system, you can reach 
out per e-mail to certificat...@qgis.org


Greetings,

Andreas

Am 09.11.20 um 09:52 schrieb i...@jcis.net.au:


I know to some the idea of getting certificates for training is a bit 
like getting a degree from the Hamburger University of McDonalds but 
for others it does give a reassurance that knowledge has been taught 
absorbed and tested. It also helps with the aim of continuous 
professional development.


So is there such a system for QGIS? I thought there was but when I 
tried to find it on the QGIS website I couldn’t find it. Could 
somebody point me in the right direction?


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] refresh conditional formatting in attribute table

[Andreas Neumann]

Hi Guido, 


You might get more replies on the QGIS developer list [2] for PyQGIS
related questions. See
https://lists.osgeo.org/mailman/listinfo/qgis-developer 

Andreas 


On 2020-10-12 16:37, Häfliger Guido wrote:

Hi 

I'm developing a plugin which executes some updates of attributes on a loaded layer where are conditional formatting rules (full row) in the attribute table are defined. I want to apply the conditional formatting rules after the table-updates by python. It works if I close and open the attribute table by pyqgis but I only manage to close the attribute table in dock view. My questions: 

-  Is it possible to apply the conditional formatting rules by pyqgis without closing and opening the attribute table (loop over all rules and apply them)? 

-  How can I close an attribute table which is not in docked view by pyqgis? 

Thanks for your help in advance 

 


Dipl. Ing. ETH Guido Häfliger
EDV/GIS-Spezialist
Tel. ++41 41 462 97 60
guido.haefli...@vogelwarte.ch
www.vogelwarte.ch [1]

Schweizerische Vogelwarte | Seerose 1 | CH-6204 Sempach | Schweiz 

Station ornithologique suisse | Seerose 1 | CH-6204 Sempach | Suisse 
Stazione ornitologica svizzera | Seerose 1 | CH-6204 Sempach | Svizzera 
Swiss Ornithological Institute | Seerose 1 | CH-6204 Sempach | Switzerland 


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Re: [Qgis-user] creating one portable QGIS project

[Andreas Neumann]

For storing the .qgs file in a geopackage you can simply do "Project"
--> "Save As" --> "Geopackage". 


I think you could even have multiple .qgs project files in a single
Geopackage. 

Andreas 


On 2020-10-07 11:50, Richard Duivenvoorde wrote:

On 10/7/20 11:45 AM, Andre Ulrich wrote: 


Dear community,

I want to export a QGIS project. In this project there are a few layers (the 
path for each layer is set according to where the data is saved on my 
computer). I can open the project on my computer and all the layers are 
available.
But when I send the project (and all the data for the layers - everything is in 
one repository) to a colleague, he can not view the layers (because the paths 
are still set according to my computer). One can fix this in a few minutes by 
setting up the correct paths, but this is very annoying. And once the paths are 
set correctly, all the symbology from the layer properties is lost (or reset to 
some standard).

Is there a way to save a QGIS project and all the related data as one file (so 
that another person, who opens this file on its own computer, does not have to 
set up all the paths and edit the symbology)?


Try the QConsolidate plugin from Alex Bruy:
https://github.com/alexbruy/qconsolidate
available from his plugin repo (or github)
https://plugins.bruy.me/qconsolidate.html

It is also possible to export your data to an geopackage yourself, as you can 
also save symbology for layers into a geopackage, and..., wel you would need to 
sent 2 files then: the gpkg with you data+symbology and your QGIS project file
(was there a plugin to write your projectfile into a gpkg?)

HTH

Regards,

Richard Duivenvoorde

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Re: [Qgis-user] Tip: test a Pull Request for Windows users

[Andreas Neumann]

Hi, 

Really nice - I didn't know about this either. Quite convenient! 

Andreas 


On 2020-10-01 16:00, Richard Duivenvoorde wrote:


Hi Devs/Users,

Not sure if I was the only ignorant one here :-)

But see: https://github.com/qgis/QGIS/issues/39081

After Even Rouault had fixed an issue, I build and tested the PR on my Linux 
machine.
BUT... the person from the issues then told me that it was possible to 'just 
download the artifact from the azure windows test suite and use that to test 
the PR'.

So for others (Windows) users: IF your issue is fixed and you want to test the 
fix yourself in an easy way by logging in in Github, and then get the artifact 
from the Windows azure test (at the PR), unzip/unpack it to disk and just run 
that version!!
No need to compile yourself, or wait for the nightly build to finish/be 
available.

I hope this is an eye-opener for others too (credits to @pathmapper !!)

Regards,

Richard Duivenvoorde
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Re: [Qgis-user] pdf generation not working

[Andreas Neumann]

Hi, 


Most likely, you are not an runninng an X-Server and/or haven't
configured the display environment variable properly. 


See
https://docs.qgis.org/testing/en/docs/server_manual/getting_started.html#xvfb
[1]for more information. 

Greetings, 

Andreas 


On 2020-09-17 12:35, Davide wrote:


Hi,

we are using the qgis web client 2, but when we request the pdf, then an error 
occours. Debugging the request we see that the qgis server, that uses 
qgis_mapserv.fcgi return error 500 (tested directly with curl).

We have tried to enable logging like

QGIS_SERVER_LOG_FILE
QGIS_SERVER_LOG_LEVEL

but logs are always empty.

With this situation we can't understand where the problem is.

Any suggestion about how to enable logging and/or why the pdf can return and 
error 500 ?

Thanks in advance for any help!

Davide Montesin
Italy
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Re: [Qgis-user] Relation (1-N) Unpredictable Result (with default options)

[Andreas Neumann]

Hi Jeffrey,

Ah - this sounds familiar. I am cc'ing Denis Rouzaud who fixed this on 
master.


See https://github.com/qgis/QGIS/issues/37266

@Denis - was this ever backported to 3.10? From 
https://github.com/qgis/QGIS/pull/37286 I can't tell.


If this isn't fixed in 3.10 yet, I strongly suggest to do so.

Thanks for a clarification, Denis,

Andreas

Am 15.09.20 um 17:50 schrieb Jeffrey Durrence:

Andreas,

Thank you for your interest in my reported problem.  I have worked 
with this some today in hopes of opening an issue on GitHub.  
Unfortunately, the problem seems even more mysterious to me after 
further testing.


I have 2 data data tables generated extracted from a fulcrumapp.com 
app.  These 2 tables have a foreign key relationship by design, so 
they should work well in QGIS using the relation feature.  After 
today's testing, I can tell you that they actually do work fine so 
long as I use a very small subset of the actual data.  This is the 
mysterious part.  For example, if I limit the parent table to only 10 
records and then limit the child table to those records linked to the 
10 parents, QGIS performs as expected.  If I use all of the data 
(around 4000 parent records and 9000 child records), then I get an 
incorrect parent-to-child assignment for new child records that I try 
to create.


With this being the case, I don't feel confident posting an issue on 
GitHub.  I would have to anonymize the data to post on GitHub, and 
that would require further work on my end.  If I have more time today 
or tomorrow, I will try to further investigate the problem to see if I 
can learn more about the behavior.


-Jeffrey

--
Jeffrey Durrence
jeffrey.durre...@mcleanengineering.com
McLean Engineering Company
815 South Main Street
Moultrie, GA  31768
1.229.985.1148 (Voice)
1.229.985.2248 (FAX)
1.229.798.0480 (Mobile)

--------
*From: *"Andreas Neumann" 
*To: *"Jeffrey Durrence" 
*Cc: *"qgis-user" 
*Sent: *Tuesday, September 15, 2020 2:12:12 AM
*Subject: *Re: [Qgis-user] Relation (1-N) Unpredictable Result (with 
default options)


Hi Jeffrey,

Can you please open an issue on Github 
(https://github.com/qgis/QGIS/issues) and include your DDL SQL 
statements you used for these tests - including all pkey/fkey and 
other constraints you used and a simple QGIS project file 
demonstrating the issue. It is easier to discuss such issues on Github.


Maybe it is related to the fact that Comboboxes aren't properly 
initialized with NULL values, for cases that don't allow NULL values.


This is important to investigate - as it is unacceptable that corrupt 
data is collected.


Thanks,

Andreas

On 2020-09-15 04:32, Jeffrey Durrence wrote:

Today I was trying to set up an edit form for a spatial table with
a related, non-spatial table.  I have done this many times in the
past, but it's been a while.  After using Project Properties to
set up my relation, I made several attempts to add a new record in
the "child" table.  Each time I tried, the new record did not get
the correct value for the field which relates the two tables. 
Existing records were displayed as expected and could be edited,
but I could not add new features.
I went to the docs to see if something had changed that might be
affecting me.  I downloaded sample shapefile data and used that to
demonstrate that related records could be created with that data. 
I set up a clean database and QGIS project file and made several
attempts with my PostGIS data.  I did observe that some new
options were available to me under the widget area of the child
table.  What had me confused was that with the default options
selected (the way I used to do it), the "reference field" values
generated for the "new" child records were real values -- just not
at all the correct values.
I tried several things with the PostGIS data, but what finally
fixed the behavior for me was to make one change in the default
Widget settings for the "reference field" in the child table
properties.  In my case, enabling the option to "Use a read-only
line edit instead of a combobox" resolved the issue.  When that is
enabled, new child records get the correct value for the reference
field.  I don't completely understand what determined the inserted
values when this option was not enabled,  but I would think that
enabling this by default would save a lot of confusion for users
like me.  I was quite surprised that I could not find folks
talking about this in the usual places.  Could be that there is
something local to my environment, but I thought it worth
mentioning should someone else stumble upon it.
Using QGIS LTS (3.10.5) on Ubuntu 20.4 and Windows 10 64-Bit with
PostGIS 

Re: [Qgis-user] Report Layout strange behaviour with photos

[Andreas Neumann]

Hi Bernd, 


The best intro to QGIS reports (that I know) can be found at Nyall
Dawsons website:
https://north-road.com/2018/01/23/exploring-reports-in-qgis-3-0-the-ultimate-guide/


Nyall is also the developer who worked on the reports. 


The reports in QGIS did not get a lot of attention yet - Tim Sutton
presented reports and his reults at FOSS4G in Bucharest - and like you,
he ran into a lot of limitations and hidden things you need to do with
expressions and such. There is definitely room for improvements. 


Collecting feature requests at Github is great, but it would be very
good to collect (reference) all of these in a QGIS QEP and then we could
find a dev (most likely Nyall) and come up with funding. I am pretty
sure that Tim Sutton would join your effort - and myself as well ;-) If
this effort is backed by a convincing collection of useful improvements,
I am confident that we can find organizations funding it. 


We could also schedule a meeting with Tim, Nyall and yourself - and
other interested users to discuss further improvements. But collecting
missing things upfront to such a meeting would make the discussion much
more productive. 

Hope this helps, 

Andreas 


On 2020-09-15 11:17, Bernd Vogelgesang wrote:


Hi Andreas,

hope I did not sound too negative. For sure I would like to help in some
way. I give money in nearly every crowdfunding project, though I even
don't need most functionalities there.
Around the report function, there is quite a sounding silence in the
lists and the web, so I assume that few people use it, or feel too
stupid to ask cause they don't get it to work properly.

What I already tried, was to collect issues on github for the Report 
But already there the problems begin: There is not a label for it (only

a general "Print Layout") and report is a very common word)
This may be intended as the reporting seems to be the younger brother of
the Atlas, but makes it not easier ;)

Before I would be able to create a QEP, I would need someone to explain
me the parts in Report that I maybe simply do not understand.

So, count me in (at least a bit ;) )

Bernd

On 15.09.20 08:30, Andreas Neumann wrote: Hi Bernd,
The report functionality definitely needs some love. There is a great
base now, but it needs to improve.
Would you volunteer to collect missing things regarding reports in a QEP
and then help organize a crowd-funding? Even if you can't fund this
yourself, it would help a lot to come up with a sound proposal /
specification, that some interested developer can submit a quote and we
can look around for funders.
There are quite a few successful examples in the past where someone who
missed a functionality in QGIS but couln't finance it came up with a
sound proposal and then we could find a developer and funders based on
that initiative.
Or you could organize this as a joint effort - e.g. through the german
QGIS user group.
Greetings,
Andreas
On 2020-09-14 23:09, Bernd Vogelgesang wrote:

On 14.09.20 22:30, Håvard Tveite wrote: Including photos / images in reports is 
covered by the documentation.

See:
https://docs.qgis.org/testing/en/docs/user_manual/print_composer/create_reports.html#including-pictures-in-a-report

It worked for me.
It should now also be possible to use images stored in a BLOB field.

Håvard 
Thanx for answering. Indeed there is something about adding photos, but

actually this version of the doc is somehow not showing up in google
searches:

Furthermore, I did not have the problem of having to construct a path to
the image. The full path is already in the data (from the nice toolbox
function for geotagged images). The report just did't eat the path.
After dozend and dozends of attemps, QGIS somehow seemed to give up on
refusing them, and now miraculously is accepting the path.

The problem, that all images where repeatedly showing in all section got
solved too. In the level up for the subplots, I had to use the field
unique for each subplot and not that for the plot, as I wrongly assumed.
Having it set wrongly didn't influence the correct print of the plots
and then their subplots, but had influence on the follwing photos. Pfuh,
the logic behind, how the report "knows "what to print in lower levels
is actually not really obvious, It seems to figure this out on its own.

So, seems I get it working.

Major flaws:
There is only the possibility to select an existing field for a layer in
report groups. So the data has to be prepared for each and every
possible usage beforehand. Having the possibilty to use expressions here
would be phantastic. So now, when you find out that you had not the
right variables for your job in the data, you have to stop working on
the report and fumble the stuff into the attributes. I worked around
this problem by setting up a nice model to prepare my data, but not
everyone has the knowledge to do so.

Found no way to add sections within the "tree" or to move anythin

Re: [Qgis-user] Report Layout strange behaviour with photos

[Andreas Neumann]

Hi Bernd, 


The report functionality definitely needs some love. There is a great
base now, but it needs to improve. 


Would you volunteer to collect missing things regarding reports in a QEP
and then help organize a crowd-funding? Even if you can't fund this
yourself, it would help a lot to come up with a sound proposal /
specification, that some interested developer can submit a quote and we
can look around for funders. 


There are quite a few successful examples in the past where someone who
missed a functionality in QGIS but couln't finance it came up with a
sound proposal and then we could find a developer and funders based on
that initiative. 


Or you could organize this as a joint effort - e.g. through the german
QGIS user group. 

Greetings, 

Andreas 


On 2020-09-14 23:09, Bernd Vogelgesang wrote:

On 14.09.20 22:30, Håvard Tveite wrote: 


Including photos / images in reports is covered by the documentation.

See:
https://docs.qgis.org/testing/en/docs/user_manual/print_composer/create_reports.html#including-pictures-in-a-report

It worked for me.
It should now also be possible to use images stored in a BLOB field.

Håvard


Thanx for answering. Indeed there is something about adding photos, but
actually this version of the doc is somehow not showing up in google
searches:

Furthermore, I did not have the problem of having to construct a path to
the image. The full path is already in the data (from the nice toolbox
function for geotagged images). The report just did't eat the path.
After dozend and dozends of attemps, QGIS somehow seemed to give up on
refusing them, and now miraculously is accepting the path.

The problem, that all images where repeatedly showing in all section got
solved too. In the level up for the subplots, I had to use the field
unique for each subplot and not that for the plot, as I wrongly assumed.
Having it set wrongly didn't influence the correct print of the plots
and then their subplots, but had influence on the follwing photos. Pfuh,
the logic behind, how the report "knows "what to print in lower levels
is actually not really obvious, It seems to figure this out on its own.

So, seems I get it working.

Major flaws:
There is only the possibility to select an existing field for a layer in
report groups. So the data has to be prepared for each and every
possible usage beforehand. Having the possibilty to use expressions here
would be phantastic. So now, when you find out that you had not the
right variables for your job in the data, you have to stop working on
the report and fumble the stuff into the attributes. I worked around
this problem by setting up a nice model to prepare my data, but not
everyone has the knowledge to do so.

Found no way to add sections within the "tree" or to move anything. Once
you laid out a design and forgot a title page or mid-sections, you seem
to have to restart from scratch. No way to manipulate it later.

Found no way so far to add page numbers.

All in all. Spent 2 days now on this 30 page report and I hope I will
remember next time how to glue things together.
This could be a really powerful tool for lazy people having to do boring
reports frequently. So far, no time was gained, and I had to use extra
doses of alcohol not to give up.;)
Hopefully developers will give it a little more love some day to make it
a bit smoother, then it will really rock!

On 14.09.2020 18:20, Bernd Vogelgesang wrote: Hi there,

I'm really eager to finally figure out how to create a photo
documentation with QGIS.

Everything needed is prepared and in place. I have overview coverages of
plots with sub-plot over an aerial image. The maps are nicely produced
to a report as groups. On each overview, the belonging sub-plots follow
as individual maps.

Now I would like to show pictures taken on the sub-plots.

First issue: I add a new group photo-points and as field I select the
referencing field for the sub-plot. Edit body, add picture frame. When
setting the full file path for the images (stored as field "photo" in
the point file, generated with "Import geotagged photos") there is only
a red cross shown, and the selection in the dialog jumps from raster to
svg. On export as pdf, there is a warning "Picture source is missing or
corrupt".

I redid this several times, to no avail, but once in a sudden, a preview
image was shown, though I did not change the slightest thing in the
settings. I swear!

Second issue: Now that it finally accepted the path, exporting the
report now produced a page for each picture under each sub-plot, instead
of filtering those which actually fit there (and how it does with the
sub-plots within the plots!)

Has anyone an idea what might be wrong here. Documentation on this
matter or examples are unfortunatly nonexistent.

Linux Mint, 3.14.1

Cheers,

Bernd

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Re: [Qgis-user] Relation (1-N) Unpredictable Result (with default options)

[Andreas Neumann]

Hi Jeffrey, 


Can you please open an issue on Github
(https://github.com/qgis/QGIS/issues) and include your DDL SQL
statements you used for these tests - including all pkey/fkey and other
constraints you used and a simple QGIS project file demonstrating the
issue. It is easier to discuss such issues on Github. 


Maybe it is related to the fact that Comboboxes aren't properly
initialized with NULL values, for cases that don't allow NULL values. 


This is important to investigate - as it is unacceptable that corrupt
data is collected. 

Thanks, 

Andreas 


On 2020-09-15 04:32, Jeffrey Durrence wrote:

Today I was trying to set up an edit form for a spatial table with a related, non-spatial table.  I have done this many times in the past, but it's been a while.  After using Project Properties to set up my relation, I made several attempts to add a new record in the "child" table.  Each time I tried, the new record did not get the correct value for the field which relates the two tables.  Existing records were displayed as expected and could be edited, but I could not add new features. 

I went to the docs to see if something had changed that might be affecting me.  I downloaded sample shapefile data and used that to demonstrate that related records could be created with that data.  I set up a clean database and QGIS project file and made several attempts with my PostGIS data.  I did observe that some new options were available to me under the widget area of the child table.  What had me confused was that with the default options selected (the way I used to do it), the "reference field" values generated for the "new" child records were real values -- just not at all the correct values. 

I tried several things with the PostGIS data, but what finally fixed the behavior for me was to make one change in the default Widget settings for the "reference field" in the child table properties.  In my case, enabling the option to "Use a read-only line edit instead of a combobox" resolved the issue.  When that is enabled, new child records get the correct value for the reference field.  I don't completely understand what determined the inserted values when this option was not enabled,  but I would think that enabling this by default would save a lot of confusion for users like me.  I was quite surprised that I could not find folks talking about this in the usual places.  Could be that there is something local to my environment, but I thought it worth mentioning should someone else stumble upon it. 

Using QGIS LTS (3.10.5) on Ubuntu 20.4 and Windows 10 64-Bit with PostGIS backend (observed same behavior with Postgres 10.14 / PostGIS 2.4.4 and Postgres 12.4 / PostGIS 3.0.0) 


--
Jeffrey Durrence
jeffrey.durre...@mcleanengineering.com
McLean Engineering Company
815 South Main Street
Moultrie, GA  31768

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