Re: [Qgis-user] Cannot erase a polygon

[DelazJ via QGIS-User]

Hi,
As Gordon pointed out earlier, this looks to me like an annotation display. 
Please read 
https://docs.qgis.org/3.34/en/docs/user_manual/map_views/map_view.html#interacting-with-features
 for deletion.

Regards,
Harrissou

Le 7 mars 2024 03:48:27 GMT+01:00, Adam Nielsen via QGIS-User 
 a écrit :
>> Thanks for replying. Yes I can zoom in and out of the polygon. I also
>> closed the Project several times and nothing happens.
>> 
>> If it is a QGIS bug, it means I better redo the Project? Or is ther a
>> alternative solution?
>
>I'm sure there's a way around the problem.  It seems quite unusual.
>
>How did you add the polygon initially?  That might shed some light on
>why it's there and how to remove it.
>
>You don't have any print layouts or anything active?
>
>If you don't have any luck, and the project is not confidential, it
>could be useful to share it so we can try it for ourselves.  You can
>save a copy of the project for this, and then delete all the layers
>from the copy so the only thing in the project is the polygon.  You may
>even find as you do this the polygon disappears when you delete a
>certain layer which might give some hints about where it's coming from.
>
>Cheers,
>Adam.
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Re: [Qgis-user] Convert .shp to CAD, with attribute values as different layers

[DelazJ via QGIS-User]

Hi Chaz,
There was a bug that hid that in the past (fixed in next release) but if you 
scroll the dxf dialog to the right, you'll get an "output layer attribute" 
column that helps you select whether a layer should remain a layer in the dxf 
or split across one of its fields.
https://docs.qgis.org/3.28/en/docs/user_manual/managing_data_source/create_layers.html/create-dxf-files

Regards,
Harrissou

Le 13 février 2024 11:21:13 GMT+01:00, Christine via QGIS-User 
 a écrit :
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Re: [Qgis-user] Batch Processing Tool for Wedge Buffers

[DelazJ via QGIS-User]

Hi
Krishna Ayyala, are you sure the batch processing is what you need? You mention 
you have a single file. In your original message "creating wedge buffers 
automatically", Andrea suggested to use the algorithm in the "default" mode, 
setting the fields as arguments through the data-defined button next to each. 
No feedback yet. Have you tried his suggestions?

Regards,
Harrissou

Le 11 février 2024 17:12:57 GMT+01:00, Ujaval Gandhi via QGIS-User 
 a écrit :
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Re: [Qgis-user] Missing Raster Calculator in QGIS 3.34

[DelazJ via QGIS-User]

Hi,

https://github.com/qgis/QGIS-Enhancement-Proposals/issues/271#issue-1694300882

> the entry in Raster menu will open the Processing algorithm instead

Looks like the Raster menu still points to the old C++ Raster calculator.
I thought the Processing algorithm would replace the old C++ tool but now, 
instead of 3 raster calculators (gdal, c++ and Processing python) that already 
confused some users, the refactoring leads to 4 raster calculators where the 
new Processing ones _almost_ cover what the old C++ one actually does. Should 
we not remove that one?

Regards,
Harrissou

Le 19 décembre 2023 12:54:05 GMT+01:00, Andrea Giudiceandrea via QGIS-User 
 a écrit :
>> Luigi Pirelli luipir at gmail.com
>> Mon Dec 18 15:39:19 PST 2023
>
>> intentionally I would say:
>
>At 
>https://github.com/qgis/QGIS-Enhancement-Proposals/issues/271#issuecomment-1775492835
> it is stated that:
>
>before...>>
>
>Anyway, it looks like the toolbox processing algorithm's GUI doesn't work 
>_exactly_ the same way as before, since the reported missing possibility to 
>save and load custom expression and also the missing functionalities reported 
>at [1] and [2].
>
>Best regards.
>
>Andrea
>
>[1] https://github.com/qgis/QGIS/issues/55386
>[2] https://github.com/qgis/QGIS/issues/55387
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Re: [Qgis-user] WG: Rendering log messages

[DelazJ via QGIS-User]

Hi Simon,

The option has indeed been removed from the Rendering tab and kept only
under the "Advanced" tab of the Options dialog[0], as logCanvasRefreshEvent.

[0] https://github.com/qgis/QGIS/pull/49437#issuecomment-1191258834

Regards,
Harrissou

Le lun. 28 août 2023 à 11:39, Simon Gröchenig via QGIS-User <
qgis-user@lists.osgeo.org> a écrit :

> Hi,
>
>
>
> I am still looking for the option to enable/disable rendering
> logging/debugging (see below). Can please someone give me a hint? Or maybe
> a python script?
>
>
>
> The old setting is visible here (Debugging section):
>
>
>
>
> https://docs.qgis.org/3.16/en/docs/user_manual/introduction/qgis_configuration.html#rendering-settings
>
>
>
> It seems that is disappeared when vector and raster sub-categories have
> been introduced to the rendering settings.
>
>
>
> Thanks
>
> Simon
>
>
>
>
>
> *Von:* Simon Gröchenig
> *Gesendet:* Freitag, 21. Juli 2023 13:50
> *An:* qgis-user@lists.osgeo.org
> *Betreff:* Rendering log messages
>
>
>
> Hi,
>
>
>
> how can I activate/deactivate the rendering log messages (that shows the
> drawing duration for each layer).
>
>
>
> I have an old profile where it is activated and a new one where it is
> deactivated. I cannot find the setting any more (rendering options?). Is
> the setting hidden or moved to advanced options?
>
>
>
> Simon
>
>
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Re: [Qgis-user] Running QGis on a machine with Python 3.11 and PyCharm ?

[DelazJ via QGIS-User]

Hi,

Le lun. 12 juin 2023 à 10:58, Johannes Kröger (WhereGroup) via QGIS-User <
qgis-user@lists.osgeo.org> a écrit :

> Hi,
>
[snip]

> The internet is full of ancient, random and poorly compiled batch scripts
> which really shouldn't be used anymore.
>
Great point! This is where IMHO QGIS official documentation should have a
say and play an authoritative role, with up to date, clear and meaningful
instructions.
This topic of configuring QGIS with python environment is to some extent
"discussed" at [0] and [1]. Do these pages meet the conditions to play that
authoritative role? I'm not that sure, given how recurring the topic
arises, but TBH I'm not versed enough in Python to be fully credible.

[0]
https://docs.qgis.org/3.28/en/docs/pyqgis_developer_cookbook/plugins/ide_debugging.html#debugging-with-pycharm-on-ubuntu-with-a-compiled-qgis
[1]
https://docs.qgis.org/3.28/en/docs/pyqgis_developer_cookbook/intro.html#python-applications

Regards,
Harrissou

> Cheers, Hannes
> Am 09.06.23 um 18:11 schrieb Toussaint OTTAVI via QGIS-User:
>
> Hi,
>
> I'm new to QGis. I'm trying to install latest version (3.28.7 LTR) on my
> machine. It does not run. The startup window shows during a few seconds,
> then, nothing.
>
> I tried several older versions. None of them wants to start. The exception
> is 3.14, which starts, and works perfectly.
>
> On my machine, I already have a Python 3 installed (currently, 3.11.1), on
> absolute path C:\Python, PYTHONPATH system variable pointing to it, and
> system path, too. I also have PyCharm installed. I think this may be the
> cause of my problem. I noticed the included interpreter (C:\Program
> Files\QGIS 3.28.7\bin\python.exe) does not start at all, with Python error :
>File "C:\Python\Lib\io.py", line 54, in 
>ImportError: cannot import name 'text_encoding' from 'io' (unknown
> location)
>
> If I understand well, I'll have to write a customized startup script, with
> correct path (not pointing to my c:\python\lib) so that QGis can start
> using the included Python interpreter (and not my system-wide one). But I
> didn't find how to achieve that.
>
> Later, I think I'll have to write some QGis Python code. Then, I'll need
> to run it in "developer" mode : being able to put the source code in a git
> repository, edit the code in PyCharm, and run it. Any clues are welcome.
>
> Thank you in advance. Kind regards
>
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> -
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Re: [Qgis-user] DXF Export symbolLayer

[DelazJ via QGIS-User]

Hi,
Sorry if it has been said (I did not read every thing) but if I'm not wrong
there is an option to use field values and get split layers in output dxf
file. This is under the "Output layer attribute" column [0]. Unfortunately,
there is a bug (for many versions now) [1] that hides by default that
column in the dialog.

[0]
https://docs.qgis.org/3.28/en/docs/user_manual/managing_data_source/create_layers.html#creating-new-dxf-files
[1] https://github.com/qgis/QGIS/issues/49958

Harrissou

Le lun. 12 juin 2023 à 13:31, Richard McDonnell via QGIS-User <
qgis-user@lists.osgeo.org> a écrit :

> Hi Simon,
>
> Apologies, I didn’t quite understand what you were trying to do. So let’s
> start from the beginning again.
>
> Thank you for sending on a sample, it helps greatly to understand what you
> are trying to do. Im still not 100% on what you are trying to achieve, so I
> have included two separate examples based on your data.
>
>
>
> In this first example, I will assume you are just trying to output the
> Layer as a DXF with symbols and styling as you have them shown on the
> canvas, this can simply be done by…
>
>
>
> 1.   Selecting *Project* from the Menubar then *Import*/*Export* – *Export
> Project to DXF*
>
> 2.   In the next window set the* Save As* field set the Location you
> want your DXF along with giving it a name.
>
> 3.   *Symbology Scale* This will depend on what scales the DXF is
> being printed out at, I have set 250 for the example
>
> 4.   *CRS*, I have kept it the same as your Project
>
> 5.   *Layer *This is the Layers you want to export, in this case
> *sqq_subset*
>
> 6.   If you are only exporting *only* what’s in Canvas view tick*
> Export features intersecting the current map extent,* otherwise untick
> this to export whole Layer
>
> 7.   The only other thing I would tick in *Export Labels as MTEXT* if
> you have labels you want in your outputs.
>
> 8.   Click *OK*
>
>
>
>
>
> Now if you want a DXF with two layers, *Grenzpunkt* and *Others*? You
> will need to split your single Layer into multiple layers. For the purposes
> of this I will assume were going for the two you have styled.
>
>
>
> I don’t know why I can’t add actual columns, only virtual only seems to be
> allowed
>
>
>
> Ok, so first thing to remember is DXF is not a smart dataset, so we need
> to dumb down your data a little.
>
> To do this, we need to split the dataset into two layers, one for
> Grenzpunkt and one for Others
>
> So firstly we need to categorise all data into the Layers we want
> (Grenzpunkt and Others), to do this we do something similar to what we done
> before. We create a column let’s call it “*sgg_subset*” and into this we
> can use the following formula
>
>
>
> *CASE WHEN  "TYP" = 20  THEN 'Grenzpunkt'*
>
> *ELSE 'Others'*
>
> *END*
>
>
>
> Next we use the *Split vector layer *tool to create however many layers
> we want, in our case two. We use our layers attribute as the *Unique ID
> field*, making sure the  *Add prefix to filenames* is ticked (what we
> called our column) or unticked, as you require. You can now specify the 
> *Output
> file type* and the *Output directory*. You can now click *Run*
>
>
>
> Once this is completed, load you’re newly created Layers into the Project
> and style as required.
>
> Now we can export to DXF using the tool in the first example. The
> difference being we want the *ONLY* newly created individual layers
> ticked in the *Layer* box
>
>
>
> If you want to improve how the styling, symbology is output, you will need
> to work on the QGIS Style, modifying it to get the desired output in DXF.
>
>
>
> Any of the steps above can be modified to suit the outputs you want.
>
> I have attached a zip file with the updated project and the output DXF
> examples, I hope it helps.
>
> Regards,
>
>
>
> Richard
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> ——
> Richard McDonnell MSc GIS, FME Certified Professional
> *FRM Data Management*
>
> ——
> Oifig na nOibreacha Poiblí
> Office of Public Works
>
> Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
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>
> ——
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>
> ——
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>
> ——
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> Office of Public Works
>
> Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
> Jonathan Swift Street, Trim, Co Meath, C15 NX36
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> https://https://gov.ie/opw 
>
> ——
> Email Disclaimer:
> https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/
> 
>
> *From:* Simon Gröchenig 
> *Sent:* 12 June 2023 08:08
> *To:* Richard McDonnell 
> *Cc:* qgis-user@lists.osgeo.org

[Qgis-user] Expression to sort by multiple fields

[DelazJ via Qgis-user]

Hi QGISers,

I struggled and failed to find a way to use QGIS expressions functions in
order to select features based on sorting on different fields. I played
with aggregates, arrays, maps but couldn't find how to control sort order
(and imbricate it). I finally generated virtual layers to do the work but
would really love to select and not extract.
The need in SQL is something like:

select somefields, afield, st_length(geometry) as longueur, geometry
from mylayer
where longueur < 10*order by afield desc, longueur asc*
limit 5

Any help would be more than welcome.
Thanks in advance

Kind regards,
Harrissou
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Re: [Qgis-user] Mean distance between points

[DelazJ via Qgis-user]

Hi,
The distance matrix already has a summary option
https://docs.qgis.org/3.22/en/docs/user_manual/processing_algs/qgis/vectoranalysis.html#distance-matrix

Regards,
Harrissou

Le jeu. 21 avr. 2022 à 17:23, Nicolas Cadieux via Qgis-user <
qgis-user@lists.osgeo.org> a écrit :

> Hi,
>
> Perhaps « Distance Matrix » followed by « basic statistics for field »
> would help.
>
> Nicolas Cadieux
> https://gitlab.com/njacadieux
>
> Le 21 avr. 2022 à 10:55, Chavoux Luyt via Qgis-user <
> qgis-user@lists.osgeo.org> a écrit :
>
> 
> Hi everyone,
>
> I am pretty sure that this is something that is used regularly, but I
> could not figure out how to do it. Basically we have a bunch of camera
> points (vector point data layer) and want to calculate the mean distance
> between the points (as well as the minimum and maximum distance between
> neighbouring points). Is there a specific tool or plugin that can do this
> automatically? Obviously I could use the measure line tool and do it
> manually as a last resort, but I would prefer not.
>
> Cheers,
> Chavoux
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Re: [Qgis-user] [QGIS-Developer] Questions of a newbie starting with QGIS Server

[DelazJ via Qgis-user]

Hi Richard,

Le mer. 20 avr. 2022 à 20:23, Richard Duivenvoorde  a
écrit :

> Hi Harrissou,
>
> I think your pretty close :-)
>
> Some remarks from the times I installed on Windows:
> - I used a vanilla apache installer from https://www.apachelounge.com/
> - indeed used the httpd.conf from osgeo4w to set all paths and env vars,
> VERY convenient
> - are you sure the Qt vs qt is an issue? Thought Windows paths were not
> case sensitive?
>
> Probably not an issue, indeed. I must admit I didn't test, I "fixed" rigth
away. I also had mitigated my "issue" comment in an updated version of the
mail but I think I lost the changes while switching between firefox(gmail),
thunderbird, k9-mail, on various machines.


> The GDAL_DATA path you will need when you use for example the ECW or other
> drivers
> QGIS_AUTH_DB_DIR_PATH is maybe only needed when you have a project which
> uses authentication profiles? Others?
>
> So it could make sense to have them added to the default httpd_qgis.conf
file...?


> When you have a WMS/WFS server running normally you do not have a web app
> yet.
> You either use the WMS of WFS as datasource in QGIS (or other clients)
> or you use OpenLayer/Leaflet to create an app in a browser using
> javascript.
>
> Ah OK... new world to discover but not enough time... I think I will first
try the other suggested options (oapif, catalog, server development) and
let you know.

Greetings,
Thanks.
Harrissou

Alessandro also created a landing page for WFS3/OGC API:
> https://docs.qgis.org/3.22/en/docs/server_manual/services/ogcapif.html
> but I found that sometimes tricky to setup...
>
> Maybe others can share more info/experience
>
> Regards,
>
> Richard Duivenvoorde
>
>
>
>
> On 4/20/22 18:58, Harrissou s. via QGIS-Developer wrote:
> > Hi QGISers (sorry for cross-posting)
> >
> > I'm trying to setup a QGIS Server... on Windows and I'd like to share
> some
> > suggestions/issues I faced in the process and ultimately ask for help on
> a
> > bigger issue.
> > I'm following the QGIS documentation instructions [0] and took the
> > opportunity to update the docs[1][2], given that osgeo4w provides means
> to
> > install apache. Review welcome, thanks.
> >
> > In the docs, it is suggested to add at the end of the httpd.conf file a
> > set of variables. But I notice that *most* of them are already set in the
> > httpd_qgis.conf file that is #included at the end of the httpd.conf
> file. I
> > hence ignored the addition but, Questions:
> > - are the GDAL_DATA and QGIS_AUTH_DB_DIR_PATH necessary for any purpose?
> > - If so, for what? And is it possible (does it make sense) to add them
> to the
> > httpd_qgis.conf file also?
> >
> > - Issue report: I think there is a typo in the httpd_qgis.conf file
> > setting PATH and QT_PLUGIN_PATH. It mentions apps/qt5/ while it should be
> > apps/Qt5/ (uppercase Q).
> >
> > In my process, I didn't set the gdal or db paths above, I fixed the
> > uppercase typo and when I tested I could get a reply for GetCapabilities
> as in
> > the docs. Using the QGIS training project, I could do a GetMap which
> successfully returned my map canvas image. Good! My server is OP!
> > Well, this is where I got lost. I thought the request would output in the
> > browser some image i could zoom in, pan, maybe identify... But NO, I got
> a
> > plain, static image. What am I supposed to do next? How can I make my
> > project queryable, zoomable, pannable, anythingable... in a web browser?
> > I might have overlooked, but the docs does not seem t provide any
> information for
> > newbies like me, for the next step. Where should I look now? Your help to
> > get out of this trouble would be much appreciated. Thanks.
> >
> > Regards,
> > Harrissou
> >
> > [0]
> >
> https://docs.qgis.org/3.22/en/docs/server_manual/getting_started.html#installation-on-windows
> <
> https://docs.qgis.org/3.22/en/docs/server_manual/getting_started.html#installation-on-windows
> >
> > [1] reading:
> >
> https://github.com/DelazJ/QGIS-Documentation/blob/installQGISServerWindows/docs/server_manual/getting_started.rst
> <
> https://github.com/DelazJ/QGIS-Documentation/blob/installQGISServerWindows/docs/server_manual/getting_started.rst
> >
> > [2] pull-request: https://github.com/qgis/QGIS-Documentation/pull/7508 <
> https://github.com/qgis/QGIS-Documentation/pull/7508>
> >
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Re: [Qgis-user] Mac OS QGIS installer 3.16

[DelazJ via Qgis-user]

Hi,
The correct link for the all-in-one installer is
https://download.qgis.org/downloads/macos/ltr/ (lowercase OS)

Regards,
Harrissou

Le jeu. 21 avr. 2022 à 11:44, Sebastian Gutwein via Qgis-user <
qgis-user@lists.osgeo.org> a écrit :

> Hello,
> I have a student that is trying to install QGIS on her Mac OS. Neither the
> latest or the long term version are working for some reason. In the fall
> she had 3.16 installed and wanted to try to install it again in case there
> was an issue with the latest version. However we can't seem to find 3.16 in
> the official repository. I would assume because it was after the switch
> from the KyngChaos builds they would be in the QGIS repository here:
> https://download.qgis.org/downloads/macOS/ but I only see up to 3.8.
> Should I then point her to the KyngChaos version?
> Thanks
> -Bas
>
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Re: [Qgis-user] Snap existing geometry to other layer

[DelazJ via Qgis-user]

Hi,
Don't always trust G*
There's an algorithm in Processing toolbox that may be of help in recent
releases
https://docs.qgis.org/3.22/en/docs/user_manual/processing_algs/qgis/vectorgeometry.html#qgissnapgeometries

Regards,
Harrissou

Le ven. 8 avr. 2022 à 12:34, Uwe Fischer via Qgis-user <
qgis-user@lists.osgeo.org> a écrit :

> Hello,
>
>
>
> I need to snap individual features to another layer. It’s not new features
> but existing ones. And, the process should not create a new shapefile but
> it should modify existing features that were selected beforehand for
> snapping.
>
>
>
> Google told me that there is a Plugin called „Geometry Snapper“ but I
> could not find in for QGIS 3.22 LRT.
>
>
>
> Any ideas? Thank you so much!
>
>
>
> Regards, Uwe
>
>
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Re: [Qgis-user] Extending an existing line with the vertex tool - combination with tracing possible?

[DelazJ via Qgis-user]

Le ven. 4 mars 2022 à 05:13, Nicolas Cadieux via Qgis-user <
qgis-user@lists.osgeo.org> a écrit :

> 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.
>

No, You don't need to reselect: Given an existing line, take the vertex
tool, move close to an end point, click on the '+' and you can extend it
with as many segments as you wish (
https://docs.qgis.org/3.22/en/docs/user_manual/working_with_vector/editing_geometry_attributes.html#basic-operations
- adding vertices).
The issue here, and I confirm Andreas' first message, is that the vertex
tool ignores the tracing option, you need t click every new vertices.
Another issue I saw is that I spent a lot of time to find the tracing
button: it's available on the snapping toolbar, but not on the snapping
Options widget which opens (and I didn't enable the toolbar). I still have
issues to understand why we need two interfaces for these options, with
tools that are in one place and not in the other.

Regards,
Harrissou


>  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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