Re: [Qgis-user] Pregunta

[Stefan Giese (WhereGroup) via QGIS-User]

Hola Edgar,
es un proyecto de la communidad Open Source y muchos manos trabajan en 
la próxima versión. Entonces la fecha es "mas o menos"...


saludos
Stefan

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Am 28.10.2024 um 15:33 schrieb Edgar Alvarez via QGIS-User:


I don't understand the scheduled dates to put into service a new 
version of 3.34.12.1. The release date appears as October 25 and today 
is October 28 and I don't see this new version available



Hola, aunque le estoy escribiendo en ingles, por favor su respuesta me 
la envia en español



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28/10/24, 09:33:05


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Re: [Qgis-user] Oriented points in Oracle Database

[Stefan Giese (WhereGroup) via QGIS-User]

Hi Michaela,

just an idea as a starting point, it is not a solution: as I understand 
the oriented points in ORACLE consists of the point with its coordinates 
(x,y,z) and a second virtual point - the two coordinates marked in your 
example - and both are building a vector, so there is no angle stored so 
far. A possible solution could be, to use an Oracle VIEW and convert the 
MDSYS.SDO_ORDINATE_ARRAY object in a WKT-Object and an angle. With both 
you can plot the point and rotate it. You can use SDO_UTIL to convert 
the SDO_GEOMETRY object. Something like


ATAN2(SDO_UTIL.GET_COORDINATE(mySDO_Geometry_Object, 2).SDO_POINT.Y , 
SDO_UTIL.GET_COORDINATE(mySDO_Geometry_Object, 2).SDO_POINT.X)


will return the angle in radians

Best regards
Stefan


Am 02.08.2024 um 12:58 schrieb Huesmann, Michaela via QGIS-User:


Hello all,

in an Oracle DB  I have a table with oriented points. In the GIS 
program GeoMedia and GeoMedia Smart Client the points are visualised 
correct with rotation but not so in QGIS. Is there a way in QGIS to 
use the rotation saved within the SDO_GEOMETRY?


Also my points with rotation where already existing in the table. Now 
I added some more points in QGIS but without rotation. How can I 
rotate them later? I hope there is a way without adding an extra data 
field and inserting a value for each rotation.


My geometries in Oracle look like these examples::

oriented Point in Oracle DB with rotation

MDSYS.SDO_GEOMETRY(3001, NULL, NULL, MDSYS.SDO_ELEM_INFO_ARRAY(1, 1, 
1, 4, 1, 0), MDSYS.SDO_ORDINATE_ARRAY(391055.730698232, 
5776970.49374646, 0, -0.958224533235959, 0.286017034291192, 0))


oriented Point in Oracle DB without rotation

MDSYS.SDO_GEOMETRY(3001, NULL, NULL, MDSYS.SDO_ELEM_INFO_ARRAY(1, 1, 
1, 4, 1, 0), MDSYS.SDO_ORDINATE_ARRAY(391052.320592445, 
5776971.48062262, 0, 1, 0, 0))


Best regards,

Michaela


Kreisstadt Steinfurt 

 - 48565 Steinfurt
www.steinfurt.de 

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Re: [Qgis-user] Auto-adjust profile elevation range in Atlas

[Stefan Giese (WhereGroup) via QGIS-User]

you can use the processingtool pdal:exportrastertin to generate a raster 
which can be used to drape your profile lines


best regards

Stefan

Am 24.07.2024 um 08:29 schrieb Roland Spielhofer via QGIS-User:

Thanks for clarifying!
I opened an issue:
https://github.com/qgis/QGIS/issues/58229
Meanwhile I will try to drape the profiles (atlas features) on the 
surface and calculate the range by expression - the profiles cross a 
road, so I expect the results to be usable, but there will be an 
arbitrary cut in the z-range. Some profiles will look good, some not, 
e.g. when a tree is next to the road.
Draping on point clouds is currently also not possible in QGIS (only 
on raster) - I have a different software for that.

Regards,
Roland
*Gesendet:* Mittwoch, 24. Juli 2024 um 00:56 Uhr
*Von:* "Nyall Dawson" 
*An:* "Roland Spielhofer" 
*Cc:* "QGIS User" 
*Betreff:* Re: [Qgis-user] Auto-adjust profile elevation range in Atlas
On Tue, 23 Jul 2024 at 20:29, Roland Spielhofer via QGIS-User
 wrote:
>
> Hi,
> I have a corridor point cloud and a number of cross profiles 
(linestrings) in my QGIS project.
> I would like to make an Atlas that shows a cross section of the 
pointcloud along every profile.

> So far, so good.
> What I am struggling with is that the elevation range seems to be 
fixed in all atlas elements so that I see the point cloud on some 
atlas items where the elevation range matches the point cloud while 
some items are blank as the point cloud is too high/too low for the 
elevation range of the elevation profile item.

>
> Is there a way to auto-adjust the z-range per atlas item so that the 
full z-range of the profile is always shown? The elevation profile 
panel in the main window does exactly this as default behaviour.


There's no direct option for "auto scale" as of QGIS 3.38. There's
definitely potential here for implementing that in a future QGIS
version!

One potential solution you could use in current releases would be to
take advantage of the data-defined control over the minimum/maximum
elevation in the layout item, so that each page in the atlas can have
a different elevation range. You could either set this to a field and
prepopulate each feature with manually entered min/max elevation
values, or potentially use some fancy QGIS expression magic to
dynamically pick a range based on other existing atlas feature
fields/geometry...!

Nyall


>
> Regards,
> Roland
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Re: [Qgis-user] layer classification

[Stefan Giese (WhereGroup) via QGIS-User]

Hi Michaela,

if you select one of the categorized items in the layertree you can 
toggle the visibility with the context menu (right mouse) and choose 
"toogle items" or  "Hide all items"


best regards

Stefan

Am 02.07.2024 um 08:58 schrieb Huesmann, Michaela via QGIS-User:


Hello QGIS users,

is there a way to turn all classes on or off together in a layer that 
is displayed categorized?


Regards, Michaela


Kreisstadt Steinfurt 

 - 48565 Steinfurt
www.steinfurt.de 

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im Auftrag
MichaelaHuesmann
Geodaten
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Re: [Qgis-user] Labeling: Allow HTML Formatting, text-size and map units

[Stefan Giese (WhereGroup) via QGIS-User]

Hi Thomas,

you can try to involve the map_scale variable into a dynamic size of the 
HTML Label, something like:


with_variable('fs', 25000/@map_scale,
  format(
     '%2',
 @fs , title( "Name" )))

Best regards

Stefan

Am 15.05.2024 um 09:13 schrieb Thomas Schüttenberg via QGIS-User:

Hi there!

I am just playing arund with html enhanced labeling, using the option "Allow HTML 
Formatting" on the text tab 
(https://docs.qgis.org/3.34/en/docs/user_manual/style_library/label_settings.html#text-tab).

Now I wonder how/if it is possible to override the text-size in such a manner, 
that my label as a whole is still scale dependend and is respecting the given 
map units including the minimum and maximum scale 
(https://docs.qgis.org/3.34/en/docs/user_manual/introduction/general_tools.html#unit-selector)?

Imagine you have a multi line label with the text size set to 2 meters map 
units and a maximum scale at 1:5000.
Now the first line should be double in text size and therefore I use something like 
style="font-size:20pt" (see example in manual above).

But only pt (points) seams to work as the unit in this place, which gives a 
fixed size throughout all scales and does not respect the behavior of the map 
units with maximum scale setting.

Does anyone know a trick to achieve this anyhow?

All the Best!
Thomas
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Re: [Qgis-user] WFS: Change symbolization (outline color/thickness and fill) using Python in QGIS.

[Stefan Giese (WhereGroup) via QGIS-User]

Hi mikeE

here is a small example based on your code:

uri = 
'https://www.geodatenportal.sachsen-anhalt.de/wss/service/ST_LVermGeo_ALKIS_WFS_OpenData/guest?&service=WFS&BBOX=1332412,6708967,1333423,6709355&restrictToRequestBBOX=1&VERSION=auto&typename=ave:GebaeudeBauwerk&srsname=EPSG:25832&preferCoordinatesForWfsT11=false&pagingEnabled=true'

lyr14 = QgsVectorLayer(uri, "LSA: ALKIS Gebäude (WFS)" , 'WFS')
# Farbe ändern
lyr14.renderer().symbol().setColor(QColor("red"))
lyr14.renderer().symbol().symbolLayer(0).setStrokeColor(QColor("blue"))
lyr14.renderer().symbol().symbolLayer(0).setStrokeWidth(0.5)
#lyr14.triggerRepaint() #braucht es nur wenn schon geladen
# Legende updaten
iface.layerTreeView().refreshLayerSymbology(lyr14.id())
QgsProject.instance().addMapLayer(lyr14)

Am 09.04.2024 um 15:28 schrieb Elstermann, Mike via QGIS-User:

Hello everyone,

I have a code snippet to load a WFS, how can I easily change the symbolization 
(outline color/thickness and fill) using Python in QGIS?.

  def addWFS14(self):
 uri = 
'https://www.geodatenportal.sachsen-anhalt.de/wss/service/ST_LVermGeo_ALKIS_WFS_OpenData/guest?&service=WFS&BBOX=1332412,6708967,1333423,6709355&restrictToRequestBBOX=1&VERSION=auto&typename=ave:GebaeudeBauwerk&srsname=EPSG:25832&preferCoordinatesForWfsT11=false&pagingEnabled=true'
 lyr14 = QgsVectorLayer(uri, "LSA: ALKIS Gebäude (WFS)" , ‚WFS')
 QgsProject.instance().addMapLayer(lyr14)


Thanks & best regards, mikeE.


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Re: [Qgis-user] Intermediate save of the QGIS-project

[Stefan Giese (WhereGroup) via QGIS-User]

Hi Sylvia,

there is an autosaver Plugin available: 
https://github.com/enricofer/autoSaver


Best regards

Stefan

Am 27.02.2024 um 10:45 schrieb Preuß, Sylvia via QGIS-User:


Hello,

is there a setting to save *.qgz / *.qgs e.g. automatic every 20 minutes?

I don’t mean the data but the project.

Thank you.

Sylvia


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Re: [Qgis-user] Identifying / Digitising small surface features automatically

[Stefan Giese (WhereGroup) via QGIS-User]

Hi,

yes that is possible to automate this process. The main idea is to use 
an blur-filter on your DSM - a normalized 2D gauss kernel array for 
convolutions - where the size of the kernel determines the wide of the 
features that will be extracted. The second step is to build the 
difference between DSM and DSM_blured. So the small features will 
remain. for more theory see: 
https://www.isprs.org/proceedings/xxxvi/8-w2/SITTLER.pdf


Some years ago - in my former ArcGIS job - I've wrote a small python 
routine for ArcGis using numpy to do the job. The ArcGis script could be 
found here: https://files.wheregroup.com/s/qMdZB8TH8FWWboQ and can be 
adapted to QGIS.


Best regards

Stefan

Am 05.02.2024 um 20:45 schrieb Steve Research via QGIS-User:

Does anyone know how to locate small features on a digital surface model (dsm) 
in qgis and get their coordinates?

I have a field surface with distributed molehills they show up in the dsm but 
is there a tool that will mark them as objects to digitise their locations?

I have Qgis + Saga etc. but don’t know if there is a process to mark these 
without having to do it by hand (I have lots of fields to do!).



Sent from my iPhone

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Re: [Qgis-user] Visualize time data at a certain point in time

[Stefan Giese (WhereGroup) via QGIS-User]

Hi Marco,

 in that case I would choose "Separate Fields for Start and End 
Date/Time" in the Drop down box at the Top and then use your 
valid-from-attribute and a valid-to-attributefields...


Best regards

Stefan

Am 15.01.2024 um 10:21 schrieb Marco Hugentobler via QGIS-User:

Hi all,

I have a dataset with a valid-from-attribute and a valid-to-attribute 
and need to visualize the data at certain points in time. I'm opening 
the temporal control panel and select 'Fixed range temporal 
nagivation'. There I enter two timestamps around the point in time as 
text. To visualize another point in time, entering two timestamps as 
text is required again.
Wouldn't it be better for this use case to have a mode where just 
entering one timestamp is required (possibly with a graphical 
date/time picker)? Or is this already possible and I just did not see it?


Thanks,
Marco


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Re: [Qgis-user] Oracle DB connection in QGIS

[Stefan Giese (WhereGroup) via QGIS-User]

Hi Michaela,

did you check theese options?

 * "Use estimated table metadata"
 * "Only look for user tables"

best regards
Stefan

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Am 15.12.2023 um 08:28 schrieb Huesmann, Michaela via QGIS-User:


Hello QGIS Users,

I need to access an Oracle Database in QGIS. The scheme I need to 
connect to has plenty of tables and Views and it seems that all data 
is loaded in the background even before I was able to select the few 
tables I will really need. This lakes a lot of time.


Is this a normal behaviour or can I ajust something in Database 
options? Thanks for your help!


Best regards,

Michaela


Kreisstadt Steinfurt 

 - 48565 Steinfurt
www.steinfurt.de 

Mit freundlichen Grüßen
im Auftrag
MichaelaHuesmann
IT
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E-Mail: michaela.huesm...@stadt-steinfurt.de 




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Re: [Qgis-user] Specific pages to export from Map Atlas

[Stefan Giese (WhereGroup) via QGIS-User]

Hi,

you can use the page properties of your layout -just right click into 
your layout and select "page properties". There is a checkbox "Exclude 
pages from export" which can be overided by an expression like: /

/

/@atlas_featureid not in (8,9,10,11,12)/

Best regards

Stefan/
/

Am 27.10.2023 um 16:32 schrieb krishna Ayyala via QGIS-User:

Hello,
I have a map with 70 pages which I created using using Atlas feature 
in the layout. If want to export only specific page range; for ex:pg 8 
to pg12, how can I do that?


Thank you and Regards.

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Re: [Qgis-user] No visualizo archivos laz en QGIS

[Stefan Giese (WhereGroup) via QGIS-User]

mira aqui:

Am 30.06.2023 um 10:28 schrieb Rafa García via QGIS-User:


Buenos días,

Estoy utilizando QGIS en versión 3.28.8 Firenze en mi sistema Windows 
10 de 64 bits


He cargado archivos .laz y no veo los puntos en el panel, solo veo una 
cuadrícula de trazos roja.


¿Necesito instalar algún complemento?

Gracias por la respuesta.

Saludos,

Rafa García

fotor...@gmail.com


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Re: [Qgis-user] Qgis atlas print composer : aggregate (bigger overlap)

[Stefan Giese (WhereGroup) via QGIS-User]

Hi,

you can use overlay functions instead, there you can sort the size of 
intersection and take the biggest one:


/overlay_intersects(layer:='//PARCEL_LAYER//', expression:="parcel_id", 
sort_by_intersection_size:='des')[0]/


hope this helps
Stefan

Am 12.06.2023 um 14:04 schrieb celati Laurent via QGIS-User:

Good afternoon,
With Qgis 3.30, In the composer interface, I generate an atlas.
My iteration layer is a polygonal layer (platforms). I added a text 
element to automatically get by spatial intersection the 'parcel_id' 
attribute present in another polygonal layer. I use the aggregate 
function for this task :


/  aggregate(
'LAYER':="PARCEL_LAYER',aggregate:='concatenate',
  expression:="parcel_id",
filter:=intersects(geometry(@parent), $geometry))/

It works. But the result shows values of all the intersections. I 
would like it limit to the result of the biggest intersection. Would 
you know how to do it?


Thanks a lot.

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Re: [Qgis-user] To show road reference numbers like Google with background svg syymol.

[Stefan Giese (WhereGroup) via QGIS-User]

Hi Paul,

did you check this nice Blog article from Anita: 
https://anitagraser.com/2011/12/23/google-road-symbols-for-qgis/


best

Stefan

Am 13.04.2023 um 09:03 schrieb Paul N via QGIS-User:

Hi,
I want to show road reference numbers as looks in Open street map or 
Google map in QGIS. NH23, SH4 etc.


Is it possible with font marker or any other way.
I have two options, 1st to use label with background. 2nd is font 
marker which I don't know?


Is there any best way to do this?

Regards

Paul N

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Re: [Qgis-user] hover over mouse to read raster value not showing in 3.30.0

[Stefan Giese (WhereGroup) via QGIS-User]

Hi Paul,

you have to disable the "Auto open form on single feature results" 
option before


Best regards

Stefan

Am 20.03.2023 um 12:10 schrieb Paul N via QGIS-User:
I am trying to read raster values by hover over mouse to read raster 
value, but option not visible in identifying tool setting. It only 
shows three option already exists in qgis 3.28.3. Mouse hower option 
not visible in 3.30.0 .


Regards

Paul N

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Re: [Qgis-user] QGIS on tablets

[Stefan Giese (WhereGroup) via QGIS-User]

in addition what Phil wrotes: Mergin Maps is also available for windows: 
https://github.com/MerginMaps/input/releases/tag/2.0.1


Best regards

Stefan

Am 20.02.2023 um 09:23 schrieb Phil Wyatt via QGIS-User:

Hi folks,

I would encourage you to also check out Mergin Maps that will work on 
IOS or Android devices. Maybe also spell out why Windows is required 
or where the apps fail. The developers may be able to assist in 
solving issues. Plenty more “rugged” devices available in Android or 
with rugged cases in IOS.


I have used Panasonic tough books in the past but tablets or even 
phones are just so much more useful these days (depending on your use 
case)



Cheers - Phil,
On the road with his iPad

On 20 Feb 2023, at 6:17 pm, Chiz Harward via QGIS-User 
 wrote:




Thanks all, weight is indeed an issue, and given I’ll be up a 
scaffold/down trenches, I’ll probably have a harness/strap of some 
sort to avoid dropping it... My GIS boffin has done some tests and 
test project is running fine on his 4GB RAM 56 GB tablet, so hoping 
can use a cheaper machine and with SSD


thanks

Chiz Harward BA MCIfA he/him

Senior Archaeologist, Urban Archaeology

Cathedral Archaeologist, Winchester

I work flexibly - so whilst it suits me to email now, I do not expect 
a response or action outside of your own working hours



http://urban-archaeology.blogspot.com

https://www.facebook.com/urb.arch/

http://gloscross-slabs.blogspot.co.uk/


Urban Archaeology

2 Slad View,

Gaineys Well,

Stroud,
Gloucestershire
GL5 1LQ

07881 486837
c...@urban-archaeology.co.uk

Urban Archaeology is a trading name of Chiz Harward BA MCIfA



https://archaeology.co.uk/awards/rescue-project-of-the-year-2023.htm

*From:*Jésahel Benoist 
*Sent:* 17 February 2023 18:04
*To:* rdmaili...@duif.net
*Cc:* Chiz Harward ; qgis-user ML 


*Subject:* Re: [Qgis-user] QGIS on tablets

Hi,

We bought some years ago the Dell Rugged Extreme tablet and I want to 
say : test before buy !


Even if QGIS works flawlessly with big projects, the Windows "tablet" 
environment is just a pain, especially the virtual keyboards (plural 
form as Microsoft has been unable to give something polished so we're 
using two)


Add to this that this real computer needs a lot of power, batteries, 
so is so heavy that that you need a necklace to handle it all day.


But the worst is the "Rugged" definition. Could you imagine that 
there's fans, that they are accessible behind plastic to the most 
common and dangerous thing for fan on earth : dust. Look on the 
fourth picture to see the fan grid.


https://www.dell.com/fr-fr/shop/ordinateurs-portables/latitude-7220-rugged-extreme/spd/latitude-12-7220-tablet/xctol7220emea

You see the point. Good luck and please share your finds.

J. Benoist

Le ven. 17 févr. 2023 à 14:50, Richard Duivenvoorde via QGIS-User 
 a écrit :


I'm (just playing) with this tablet: ThinkPad X1 Tablet Gen3
It comes with Windows, but I run Debian Testing on it and I
really like it, even the use of the pen.
Not sure about ruggedized cases for it though.

I'm afraid you will end up with the normal ruggedized Windows
tablets which are available (and pretty expensive)?

Regards,

Richard Duivenvoorde

On 2/17/23 14:43, Chiz Harward via QGIS-User wrote:
> Hi,
>
> I am looking for suggestions/spec for a Windows* tablet** that
can run QGIS during data collection and recording on
archaeological sites (dusty, sometimes damp). The work is
recording simple attributes and short text comments onto
shapefiles of e.g. wall elevations (up to 20,000 polygons,
although these could be split up). There will be geo-tif
orthophotos of the wall elevations/plans as well, although these
could be lo-res. All processing and analysis will be done in
office on a desktop, tablet is just for recording.
>
> Need a tablet that can work rapidly without beachballing
between commands or when pan across mapping. SSD, 8GB RAM enough?
Any advice appreciated,
>
> *QField is not suitable for this project
>
> **must be a tablet that can fit in a ruggedised case, laptops
are no good for the work
>
> Best wishes
>
>
> Chiz
>
>
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Re: [Qgis-user] [Modeller] How to calculate area in the graphical modeler of QGIS

[Stefan Giese (WhereGroup) via QGIS-User]

Hi,

may be it will be easier to use thhis algorithm: "Add geometry 
attributes" -> 
https://docs.qgis.org/3.10/en/docs/user_manual/processing_algs/qgis/vectorgeometry.html?highlight=exportaddgeometrycolumns#add-geometry-attributes


best regards

Stefan

Am 30.01.2023 um 14:13 schrieb Igor Oliveira Ribeiro via QGIS-User:

Hi community,
I need your help. I'm using QGIS 3.10.11 with Grass 7.8.4. I'm 
building a QGIS modeler and I want to calculate the area of an input 
polygon.


So, my input polygon is a vector feature. I tried using a field 
calculator ($area) and Advanced Python Field Calculator (Field 
"Formula", I used "value = $geom.area() ).


However, nothing is working. When I run the modeler, there is no error 
message. But, I'dont have the area calculated either.


Thanks for your help.

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Re: [Qgis-user] transferring data from ArcGis to QGIS

[Stefan Giese (WhereGroup) via QGIS-User]

Hi Janet,

beside what Alexandre pointed out, there is an other free Open source 
tool to convert ArcMap mxd files into QGIS projects (MapQonverter, 
https://github.com/WhereGroup/mapqonverter). The difference to SLYR is, 
that MapQonverter must be used within ArcMap as an ArcMap Python 
toolbox. So it is only useful if you still have an ArcMap licence to 
work with.


Best regards

Stefan

Am 20.01.2023 um 02:50 schrieb Alexandre Neto via QGIS-User:

Hello Janet,

It will really depend on what you mean by all your work. The projects 
and layouts are hard to come by, as they are in closed source format, 
which ain't interoperable with other software. But the data may be in 
one of hundreads of formats readable by QGIS, like Shapefiles and 
Filegeodatabases.


There's a plugin that tries to import QrcGIS styles into QGIS, but not 
sure what it can do. It's called SLYR, there a paid version and a 
community version/




Janet via QGIS-User  escreveu no dia 
quinta, 19/01/2023 à(s) 21:20:


For a number of years, whilst a student and on the staff of
University I have used ArcGis.  After this year I will be retiring
from University and losing this access.  I would like to copy all
my work over to QGIS, so that I can continue my research, could
you let me know if this is possible and where I can locate
directions to do it.  I have all my work on an external hard drive.

Many thanks

Janet
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Re: [Qgis-user] QGIS & GPS

[Stefan Giese (WhereGroup) via QGIS-User]

Hi Brent,


we solved this for one of our customers with the following steps:

 * Installing U-Center on the windows computer:
   https://www.u-blox.com/en/product/u-center
 * in U-Center -> View -> Configuration view → NMEA (NMEA Protocol)
 * change "Main Talker ID" to "1 – GP(GPS)"
 * click on "SEND" and then on "POLL"
 * now QGIS should directly communicate

hope this helps

Stefan

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Am 20.01.2023 um 03:50 schrieb Brent Wood via QGIS-User:

Gidday and Happy New Year from New Zealand!

I have spent too many hours on this already, sigh... Hopefully someone 
can help.


I normally use QGIS with USB GPS units on Linux and don't have driver 
issues, everything just works. But I now need to re-introduce myself 
to QGIS on Windows to set things up for other users, and it is proving 
very painful.


I'm using QGIS dev (3.29), 3.22 & v3.28 at present. Same issue on 
Windows with all of them.


I have historically used a Globalsat BR-355S4 USB GPS on Windows with 
no problems. Just install the Prolific USB-serial driver and 
everything works fine.


My recent Linux work has been using a G-Mouse (U-blox 7) chipset GPS 
which Linux typically mounts as /dev/ttyACM0 and QGIS is fine with 
that. Linux needs no additional drivers to be installed for this to work.


Now I'm trying to get this working on Windows... I can install the 
U-blox VCP (virtual com port) driver. The native driver Win10 finds & 
installs also  seems to work, but not with QGIS. I can connect to the 
relevant com port with several GPS monitoring applications & see the 
NMEA sentences fine. QGIS lists the port OK, but fails to connect on 
auto or to the port directly. This is not uncommon with the U-Blox 7, 
but none of the fixes I have found online have worked for me.


I just bought anotherGPS, a new model Globalsat one, BU-353N5, a 
replacement for the BR-355S4. This is not sending the $GP sentences, 
just the $GN ones. My GPS monitoring applications work OK with this on 
Linux & Windows, but QGIS on both platforms lists the device to 
connect to, but is unable to connect & use the GPS data. I can't even 
log the data with QGIS as QGIS won't connect to the port in the first 
place.


My 3 questions:

How can I get a U-Blox7 chipset GPS (which is working fine on Windows 
with other applications) recognised by and working with QGIS?


How can I get a Globalsat  BU-353N or other GPS that does not output 
$GPGGA or $GPRWC, but provides $GNGGA instead, etc working with QGIS?


Can anyone suggest an alternative cheap, generic USB GPS which simply 
and reliably works with QGIS on Windows?


Is this something that I should file a bug report for (it does seem to 
be a fragility in QGIS that is not present in other GPS software)? I'm 
happy to send a working USB GPS to any dev willing to look into this.



Thanks

Brent Wood

Principal Technician, Fisheries
NIWA
DDI:  +64 (4) 3860529
  Brent Wood
Principal Technician - GIS and Spatial Data Management
Programme Leader - Environmental Information Delivery
+64-4-386-0529

National Institute of Water & Atmospheric Research Ltd (NIWA)
301 Evans Bay Parade Hataitai Wellington New Zealand
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can access information transmitted to, processed by and stored on 
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Re: [Qgis-user] edit QGIS3.ini with startup.py

[Stefan Giese (WhereGroup) via Qgis-user]

Hi Thomas,

you can clear the section before adding the new values with:

/QgsSettings().remove('svg/searchPathsForSVG')/

and then add your values

Best regards

Stefan

Mit freundlichen Grüßen
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Am 05.12.2022 um 13:40 schrieb Thomas Schüttenberg via Qgis-user:

Hi there!
Because our servers have moved, the search paths for SVGs have changed. 
Unfortunately what we didn't think about before is that these old, wrong paths 
are (still) in the QGIS3.ini of the local user profiles and now cause eternal 
delays at startup because of their unreachability.

We already use a startup.py to add file paths in centralized manner, like this

gdi_global_svg = 'L:/Daten/geoservice/config/qgis_global_settings/svg'
svg_paths = QgsSettings().value('svg/searchPathsForSVG')
if gdi_global_svg in svg_paths:
 pass
else:
 svg_paths.append(gdi_global_svg)
 QgsSettings().setValue('svg/searchPathsForSVG', svg_paths)

Despite my still lacking Python knowledge, I thought one could easily include a 
corresponding fix (e.g. search and replace) in the startup.py script...
I am still googling but maybe someone could help me with this, please? That 
would save my day!

Best regards
Thomas
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Re: [Qgis-user] Determine version of QGIS Server

[Stefan Giese (WhereGroup) via Qgis-user]

see 
https://github.com/3liz/lizmap-web-client/issues/1346#issuecomment-547895968


Am 04.08.2022 um 09:32 schrieb Inka Tauber via Qgis-user:


Hello,

how can the version of QGIS Server (qgis_mapserv.fcgi) be determined?

Thanks,

Inka


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Re: [Qgis-user] Counting of bridges on road.

[Stefan Giese (WhereGroup) via Qgis-user]

Hi Paul,

try: count("bridge", filter:="bridge"='T' AND is_selected())

best regards

Stefan

Am 04.08.2022 um 07:01 schrieb Paul N via Qgis-user:

Hi,
I have road layer and segment the road where bridge exist by a field 
'bridge' =T in road layer.


I am able to count number of bridges using
count("bridge", filter:="bridge"='T').

How to count the number of bridges on selected roads?

Any clue?

Regards
Paul

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Re: [Qgis-user] QGIS WINDOWS 11

[Stefan Giese (WhereGroup) via Qgis-user]

Hi Samuel,

I have installed on my Win11 Notebook 3.10, 3.16, 3.18 and 3.22, all 
without any problems. And I would agree to what Hannes pointed out: 
update to a newer QGIS version, it's worth to do it, so many cool 
features are waiting for you and your students...


Best regards

Stefan

Am 15.06.2022 um 11:21 schrieb Johannes Kröger (WhereGroup) via Qgis-user:


Hey Samuel,

it's hard to give guarantees when it comes to software but: I don't 
think there should be any issues with *modern* QGIS versions on 
Windows 11. QGIS 3.4 is 3 years old though and in no way supported any 
more. Please try to use QGIS 3.22 or later if you are worried about 
modern Windows support.


Cheers, Hannes

Am 15.06.22 um 08:09 schrieb sam via Qgis-user:


Hello !

I’m about to buy a new computer for my next year of university. I’ll 
have some Qgis lessons and I would like to know if all the Qgis 
versions are compatibles with Windows 11 (espacially the 3.4.9 ones).


Thanks for your help !

Samuel


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Re: [Qgis-user] Fwd: Creating a polygon around vertices

[Stefan Giese (WhereGroup) via Qgis-user]

search for concavehull or see this one https://youtu.be/24H_MyXohL4

Am 12.04.2022 um 14:36 schrieb Yamen Tekaji via Qgis-user:



Dears,

I have a layer containing 700K points. please check attachment.
I want to create a polygon that passes through the outer points only. 
an outline polygon.

Can you please help me in achieving this?
If you know a web page that teaches this in details, it will 
be helpful and appreciated.


Thanks
Yamen



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Re: [Qgis-user] Atlas Map book - Display only one feature on each page.

[Stefan Giese (WhereGroup) via Qgis-user]

This is a bit tricky but can be done with rule based renderer:

In my example I have an attibute "name" and with the following rule:

/name=attributes(@atlas_feature)['name']/

you can set the visible features to the atlas feature and then only the 
atlas feature will be displayed in your atlas


Am 08.03.2022 um 04:24 schrieb krishna Ayyala via Qgis-user:

Hello,
I am reposting this question. Can anyone help me?This is the map on my 
Print composer window. In my attribute table, I have a field called 
Line_ID. There are three lines in this field; LINE 1, LINE 2 AND LINE 
3..I wish to export this to mapbook. My mapbook will have 3 pages. I 
wish to export such that, each page has only one line. i.e. Page1 
should have LINE 1, Page2 should have LINE 2 AND Page3 should have 
LINE 3. What should be the setting in my Atlas window to accomplish 
this task?

image.png
image.png



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Re: [Qgis-user] Windows 11

[Stefan Giese (WhereGroup) via Qgis-user]

yes, QGIS 3.18, 3.22 and 3.24 without any problems so far

best regards

stefan

Am 04.03.2022 um 06:03 schrieb Grant Boxer via Qgis-user:


I have a client who is running QGIS under Windows 11 and is having all 
sorts of stability problems and has gone back to version 3.4. Has 
anyone used QGIS with Windows 11?


Grant Boxer, Perth WA


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Re: [Qgis-user] Is it possible to import Arcgis Pro map to QGIS?

[Stefan Giese (WhereGroup)]

Krishna,

as you see in the error message, there is no module "comtypes" which 
must be installed on your computer: https://pypi.org/project/comtypes/


Best regards

Stefan

Am 02.03.2022 um 19:48 schrieb krishna Ayyala:

Stefan,
Thanks for the reply. I have added the "Mapqonverter.tbx" to the 
arcmap tool box. In the tool box there are two script files. 1.ArcMap 
Project to QGIS Project and 2. Style Gallery Export. The script file 
"ArcMap Project to QGIS Project " is blank i.e. there is no script in 
it. So, I copied the script from "mapqonverter.py" from github link 
and pasted. When I ran the tool, I get the following error message.

image.png


On Wed, Mar 2, 2022 at 12:19 AM Stefan Giese (WhereGroup) 
 wrote:


Hello,

we have provided a free open source Tool "MapQonverter" which can
write QGIS project files from ArcMap project files. The only thing
is, the tool is an ArcMap Toolbox, so ArcMap will be needed to use
it 😮 - that is the main difference to SLYR from NorthRoad which
can read mxd files - and ArcGis Pro files - directly into QGIS.

Our tool is available here: https://github.com/WhereGroup/mapqonverter

Best regards

Stefan

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Am 02.03.2022 um 01:35 schrieb krishna Ayyala:

An extension to this question. SLYR is not free. By any chance,
are you aware of any open source plugin or tool to accomplish
this task?

Regards.

On Tue, Mar 1, 2022 at 4:27 PM krishna Ayyala
 wrote:

Nyall,
Thanks a lot for the information.
Regards.

On Tue, Mar 1, 2022 at 3:19 PM Nyall Dawson
 wrote:

On Wed, 2 Mar 2022 at 08:13, Alexandre Neto
 wrote:
>
> ArcGIS pro map is a binary (non-human-readable)
proprietary format. Which means that, apart from ESRI, no
one knows how to read and write those files.
>
>  So, no. You can't.

Actually -- just to clarify. SLYR
(https://north-road.com/slyr/)
currently has support for reading ArcMap documents (including
lyr/mxd/etc) and converting to QGIS, and is shortly to
receive support
for conversion of ArcGIS Pro lyrx/aprx documents too!

Nyall

>
> A terça, 1/03/2022, 21:49, krishna Ayyala
 escreveu:
>>
>> Hello,
>> I have a Arcgis pro map saved with (.mapx )
extension.Is it possible to bring this map into QGIS
without losing the symbology?
>>
>> Regards.
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Re: [Qgis-user] Is it possible to import Arcgis Pro map to QGIS?

[Stefan Giese (WhereGroup)]

Hello,

we have provided a free open source Tool "MapQonverter" which can write 
QGIS project files from ArcMap project files. The only thing is, the 
tool is an ArcMap Toolbox, so ArcMap will be needed to use it 😮 - that 
is the main difference to SLYR from NorthRoad which can read mxd files - 
and ArcGis Pro files - directly into QGIS.


Our tool is available here: https://github.com/WhereGroup/mapqonverter

Best regards

Stefan

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Am 02.03.2022 um 01:35 schrieb krishna Ayyala:
An extension to this question. SLYR is not free. By any chance, are 
you aware of any open source plugin or tool to accomplish this task?


Regards.

On Tue, Mar 1, 2022 at 4:27 PM krishna Ayyala 
 wrote:


Nyall,
Thanks a lot for the information.
Regards.

On Tue, Mar 1, 2022 at 3:19 PM Nyall Dawson
 wrote:

On Wed, 2 Mar 2022 at 08:13, Alexandre Neto
 wrote:
>
> ArcGIS pro map is a binary (non-human-readable) proprietary
format. Which means that, apart from ESRI, no one knows how to
read and write those files.
>
>  So, no. You can't.

Actually -- just to clarify. SLYR (https://north-road.com/slyr/)
currently has support for reading ArcMap documents (including
lyr/mxd/etc) and converting to QGIS, and is shortly to receive
support
for conversion of ArcGIS Pro lyrx/aprx documents too!

Nyall

>
> A terça, 1/03/2022, 21:49, krishna Ayyala
 escreveu:
>>
>> Hello,
>> I have a Arcgis pro map saved with (.mapx ) extension.Is it
possible to bring this map into QGIS without losing the symbology?
>>
>> Regards.
>> ___
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Re: [Qgis-user] Newby question on mapping information

[Stefan Giese (WhereGroup)]

Miro,

may be you have a look to that and other tutorials from Ujaval, where 
some steps mentioned by Bernd are explained: 
http://www.qgistutorials.com/en/docs/3/performing_table_joins.html


Best regards

Stefan

Am 09.12.2021 um 18:51 schrieb Bernd Vogelgesang:

Hi,

from what I read and understand:

1. "with separate layers for boundaries of each plot and unique" If I
understand this correctly, every polygon has a unique layer?
Then Processing -> Toolbox -> Merge vector layers

If I understood this wrong, skip this step.

2. Toolbox -> Join attributes by field value -> Pick your boundaries
layer and the csv and set the common field

3. Layer properties -> Symbology -> Change from Single Symbol to
Categorized -> pick a field from which you can distinct the ownership ->
Classify


Good luck

Am 09.12.21 um 17:57 schrieb Miro Lucassen:
Hi, this is probably easy for experienced users, but I am stuck in 
the interface as this is my first project in QGIS.
Aim of project: map of a part of an Dutch municipal authority, marked 
areas that are owned by the local authorities.
Input 1: KML-file of all registered property (kadaster) in the 
relevant area plus a bit more, with separate layers for boundaries of 
each plot and unique ID, including geo-information
Input 2: CSV-file of all property owned by the Municipality in the 
relevant area plus a bit more, with same ID as the general KML-file, 
no geo-information


I see the map of all property, I have imported the municipality-plots 
as a separate layer, but now what? How do I connect the relevant 
property to the map, and how do I create a visualisation that shows 
the plots owned by the Municipality?


Any help is greatly appreciated.

Miro Lucassen,
The Netherlands
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Re: [Qgis-user] is there a way to clip a shapefile without changing it from point to multipoints?

[Stefan Giese (WhereGroup)]

Hi Katrin,

what algorithm do you use for that? For example native:clip produces no 
multipoints from a point origin vectorlayer.


Best regards

Stefan

Am 07.12.2021 um 16:03 schrieb Katrin Schneider:


Hi,

(QGIS 3.20.3)

is there a way to clip a shapefile without changing it from point to 
multipoints?


Work-Process:

1.I had to clip my layer A(points) with shapefile B (polygon). The 
resulting layer C is multipoint despite consisting only of points.


2.I tried several methods to edit the layer C

a)Export it as point-shapefile -> error

b)Multipoint to point -> umlauts/mutated vowels are not readable anymore

Kind regards,

Katrin

*Katrin Schneider*

FG Naturschutz & Umweltkommunikation / Fachgebietsleiterin

Unabhängiges Institut für Umweltfragen - UfU -

Büro Halle

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Schutzgebieten Sachsen-Anhalts beim UfU e.V.

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Re: [Qgis-user] startup.py on network folder

[Stefan Giese (WhereGroup)]

Hi Wolfgang,

you can start QGIS with a command line option *--code *followed by the 
path and scriptname, for example in a BAT file


Best regards

stefan
**

Am 06.12.2021 um 17:31 schrieb Wolfgang Meinolf:


Hi,

I like to implement a centrally controlled QGIS environment for our 
workforce using startup.py. Is there any trick, to put startup.py on a 
network folder instead the user’s QGIS folder i.e. under Windows 
%user%\AppData\Roaming\QGIS\QGIS3?


PYQGIS_STARTUP environment variable to change the location does 
unfortunately not work.


Thanks

Wolfgang


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Re: [Qgis-user] Does DWG work in 3.22? - RE: importing dwg/dxf

[Stefan Giese (WhereGroup)]

An other python based possibility would be to use ezdxf which gives you 
access to all or only special DWG/DXF entities and convert them directly 
into GIS vector data: https://ezdxf.readthedocs.io/en/stable/


Am 29.11.2021 um 18:36 schrieb Wolfgang Meinolf:


Hi,

I gave up to import DWG directly. I always convert them with ODA File 
Converter 20.8.0 to 2018 ASCII DXF, which I then import using QGIS 
DWG/DXF import feature. Only problem ism that large DXF i.e. including 
ALKIS Layers take ages for the import. In this case I drag&drop the 
DXF into qgis and filter the required Layers manually. In this case 
unfortunately the symbology is gone. All DWG are customer provided, I 
have no ACAD available.


Best regards

Wolfgang

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

*Gesendet:* Montag, 22. November 2021 18:55
*An:* Jeff Sonnentag ; Bernd Vogelgesang 
; Greg Troxel ; Boaz Bar 
Ilan 

*Cc:* qgis-user 
*Betreff:* Re: [Qgis-user] Does DWG work in 3.22? - RE: importing dwg/dxf

Hi,

The GDAL/ORG library works with Open Design Alliance Teigha library. 
They have a support for R13-15, R2004, R2007, R2010, R2013 and R2018 
but since Autocad is a closed format, then all of this is basically 
the result of reversed engineering.  DXF is an open format so that is 
easier to deal with.


I believe that the drag and drop functions for DWG and DXF uses the 
libopencad drivers (and that is limited to r2000 or ACAD1015)) (at 
least in QGIS 3.20) so if you did drag and drop a correct file format, 
then the DWG worked.


It's my personal experience that anything past R15 (2000) will be 
buggy in QGIS but you can also open those files using the project > 
import/export > import layer from DWG/DXF. For some reasons, some DWG 
files cannot be dragged and dropped but can be imported via the 
project import function. This has the advantage of keeping the Autocad 
styling. I guess this function probably uses the Open Design Alliance 
Teigha library and not the libopencad drivers as it will open files 
that I cannot drag and drop???  Looks like those functions are not 
available via the python API nor the Processing toolbox either:(


Anyways, when that fails (about 50% of the time on very big files), I 
save the DWG to DXF and that either fixes the file or makes it more 
compatible with the driver.  IMHO, Exporting dwg to shp file is the 
only real interesting feature of AutoCAD Map3D.  The last version I 
regularily worked with has probably 2013-15 so maybe they have updated 
the product since.


https://knowledge.autodesk.com/support/autocad/learn-explore/caas/sfdcarticles/sfdcarticles/AutoCAD-drawing-file-format.html

https://docs.qgis.org/3.22/en/docs/user_manual/managing_data_source/opening_data.html?highlight=dwg#importing-a-dxf-or-dwg-file

Nicolas

On 2021-11-21 11:06 p.m., Jeff Sonnentag wrote:

Somebody must get the same quality of “engineering” that we do
here.  :D

The last item received was in feet and aligns with California
State Plane Zone 6, but they chopped off the first digit of both
“X” and “Y” for everything.  Who knows why.  Maybe things run
faster for them with 6 digit coordinates rather than 7 digit ones
like you mentioned. (???)

Anyway, when I tried the simple drag and drop into QGIS 3.22 it
never worked.  Always an error message about invalid data, even
after I used DWG Trueview to convert it to the oldest possible
versions (97/98 and 2000).  I did manage to get it in AFTER
converting the DWG to a DXF with an online conversion site.  That
DXF could be drug (I hate the word “dragged” – seems along the
lines of “runned”) into QGIS and appeared OK.  Export to a
shapefile and then do some affine adjustment magic and things can
be worked with.

Is there a reason that a DWG can’t be dropped into QGIS 3.22 but a
DXF can?  Are there some DWG versions that just don’t work?  I
thought I got a DWG to appear OK in 3.16, but maybe I just
imagined it and used a DXF before too. . . .

*From:* Qgis-user 
 *On Behalf Of *Bernd
Vogelgesang
*Sent:* Sunday, November 21, 2021 10:53 AM
*To:* Nicolas Cadieux 
; Greg Troxel 
; Boaz Bar Ilan 

*Cc:* qgis-user 

*Subject:* Re: [Qgis-user] importing dwg/dxf

On 21.11.21 15:35, Nicolas Cadieux wrote:

Hi,

.dwg or dxf have no CRS.  They can be in inches, feet, mm, cm,
m... Usually meter in a local CRS like a local WGS84 UTM ZONE
is used.  You can usually find this in the metadata if available.

Nicolas

I have no deep technical insight into dwg or dxf, but I am pretty
sure that those  CAD-"products" are able to be produced with valid
coordinates, fitting to a common CRS. Most people using
CAD-systems simply seem to be either to

Re: [Qgis-user] Windows 11 - QGIS and or ODM?

[Stefan Giese (WhereGroup)]

Hi Tony,

yes I did upgrade to 11 on one of my Notebooks. So far, no problems 
identified with QGIS (3.18).


Best regrads

Stefan

Am 01.11.2021 um 23:11 schrieb Tony Shepherd (FarmMaps NZ):


HI All

I am being pestered by Windows to upgrade to Win 11.  Has anybody done 
that already and if so were there any issues with QGIS (or ODM if you 
use it?)?


Cheers

Tony

*Tony Shepherd**|*GeoSpatial / Mapping Manager

Ph 027 435 6193 *|*  E t...@farmmaps.nz 

FarmMaps NZ, 3 Kerwood Place, Gore 9740

FM_logo1_small (Custom)

**

** ** 
**



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Re: [Qgis-user] Dynamic SVGs

[Stefan Giese (WhereGroup)]

perfect, thank you

Am 28.10.2021 um 11:21 schrieb DelazJ:

Hi,
Maybe some starting point at 
https://docs.qgis.org/testing/en/docs/user_manual/style_library/symbol_selector.html#parametrizable-svg?


Regards,
Harrissou

Le jeu. 28 oct. 2021 à 11:18, Stefan Giese (WhereGroup) 
 a écrit :


Hi all,

does anybody can give me are starting point how to place the
parameters
inside the SVG xml  that they are usable with dynamic SVG Feature
coming
up with QGIS 3.18

(https://qgis.org/en/site/forusers/visualchangelog318/#feature-gui-for-dynamic-svgs)?

An examlple svg would be greatfully appreciated .

thanks in advance

Stefan

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[Qgis-user] Dynamic SVGs

[Stefan Giese (WhereGroup)]

Hi all,

does anybody can give me are starting point how to place the parameters 
inside the SVG xml  that they are usable with dynamic SVG Feature coming 
up with QGIS 3.18 
(https://qgis.org/en/site/forusers/visualchangelog318/#feature-gui-for-dynamic-svgs)? 
An examlple svg would be greatfully appreciated .


thanks in advance

Stefan

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Re: [Qgis-user] extracting vertices from a multipolygon using Field Calculator Function Editor

[Stefan Giese (WhereGroup)]

as a starting point:

/from qgis.core import *//
//from qgis.gui import *//
//
//@qgsfunction(args='auto', group='Custom', referenced_columns=[])//
//def zCutBox(feature, parent)://
//    """//
//    Calculates vertices and return the x coordinate of the first as 
string//

//    """//
//    geom = feature.geometry()//
//    vertices = []//
//    for v in geom.vertices()://
//    vertices.append(v)//
//    return str(vertices[0].x())/

Am 18.10.2021 um 13:42 schrieb Zoltan:

Hi Listers,
I can't for the life of me work out the syntax/commands to use in the 
FieldCalculator->FunctionEditor for extracting vertices.


I have a Polygon layer with Multipolygon rectangles at various rotations.
I need to extract the 4 corner points so that I can calculate (and 
save in a virtual layer) lines that I can later use with 
"Processing->Split with lines".


I will google for opening a new virtual layer and saving lines to it, 
but if that is quick and easy then some help there would also be welcome.


Please can someone point me to a sample functions covering these 
requirements, or just fill in the gaps below.

No, I'm not asking for someone to just write it for me.

Thanks in advance,
Zoltan
[Having a brain-dead day :-(  ]


from qgis.core import *
from qgis.gui import *

@qgsfunction(args='auto', group='Custom', referenced_columns=[])
def zCutBox(feature, parent):
    vertices =

    blah blah
    return vertices[0][0]


--

=
Zoltan Szecsei GPrGISc 0031
Geograph (Pty) Ltd.
GIS and Photogrammetric Services

Cape Town, South Africa.

Mobile: +27-83-6004028 (Signal, not WhatsApp)
www.geograph.co.za
=

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Re: [Qgis-user] QGIS 3.20 Crash

[Stefan Giese (WhereGroup)]

the profile manager is now available in QGIS flagged as experimental 
Plugin. My colleague Dominik will also present it on the next QGIS Open 
Day (2021-10-29)


with the following features:

 * Create a new profile
 o Creates and initiates a new QGIS profile
 * Removing profile
 o Removes the currently marked profile
 * Copy profile
 o Copies profile into a new one with a name provided by the user
 * Rename profile
 o Renames the profile with a name provided by the user
 * Importing Datasources from one profile to another (Datasources are
   chosen by checking them in a TreeView where each source is displayed)
 * Removing Datasources from a profile
 o Removes the datasources from the chosen SOURCE profile
 * Importing bookmarks
 * Importing favourites
 * Importing plugins
 * Importing functions
 * Importing models & scripts
 * Importing style & label settings
 * Importing QGIS UI settings (f.e. hidden toolbar items)

code: https://github.com/dszillWG/profile-manager

Am 06.10.2021 um 17:52 schrieb Raymond Nijssen:


On 06-10-2021 17:26, Etienne Trimaille wrote:

Hi Raymond and others,

A plugin is very often the culprit, which is installed by the user :) 



Hi Etienne and others,

QGIS itself is also installed by the user :)
But it doesn't mean the user is to blame for bugs in it, or can be 
expected to fix them. Same counts for plugins.


Maybe instead of making new profiles, we can have functions for fixing 
an existing profile?


- Turn off all plugins
- Remove all plugins
- Remove all custom expressions
- Remove startup script
- ...

In a usual suspect kind of order?

Maybe Stefan's Profile Manager will do it?

Cheers,
Raymond
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Re: [Qgis-user] Python error upon loading and in every project

[Stefan Giese (WhereGroup)]

I suppose that your profile is corrupted by a plugin obviously by 
qgis_resource_sharing
You can start with a new profile or you can try to delete the plugin 
directly from your profile path:


Go to the folder: 
C:\Users\daves\AppData\Roaming\QGIS\QGIS3\profiles\default\python\plugins 
and delete the subfolder

qgis_resource_sharing

Am 10.10.2021 um 10:49 schrieb David Addy:


I have not needed to consult the QGIS users Mailing List for some 
time, but after changing my computer I had an issue with loading 
3.16.11 to the new machine. Upon opening an existing project QGIS 
omitted to display the thumbnails of recent projects and flagged an 
issue with Python. If anyone can throw any light on how to fix this I 
would be very grateful.


Python Error an error has occurred while executing Python Code. See 
message log for details.


==

STACK LIST

*IndexError: list index out of range *

Traceback (most recent call last):
  File 
"C:\PROGRA~1/QGIS31~1.11/apps/qgis-ltr/./python/plugins\processing\script\ScriptAlgorithmProvider.py", 
line 112, in loadAlgorithms

    folder = ScriptUtils.resetScriptFolder(folder)
  File 
"C:\PROGRA~1/QGIS31~1.11/apps/qgis-ltr/./python/plugins\processing\script\ScriptUtils.py", 
line 114, in resetScriptFolder

    commonSettingPath = os.path.join(paths[appIndex], paths[profileIndex])
IndexError: list index out of range


*Python version:* 3.9.5 (tags/v3.9.5:0a7dcbd, May  3 2021, 17:27:52) 
[MSC v.1928 64 bit (AMD64)]

*QGIS version:* 3.16.11-Hannover Hannover, 26cc1c76

*Python Path:***

·C:\Users/daves/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\TomBio

·C:/PROGRA~1/QGIS31~1.11/apps/qgis-ltr/./python

·C:/Users/daves/AppData/Roaming/QGIS/QGIS3\profiles\default/python

·C:/Users/daves/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins

·C:/PROGRA~1/QGIS31~1.11/apps/qgis-ltr/./python/plugins

·C:\Program Files\QGIS 3.16.11\bin\python39.zip

·C:\PROGRA~1\QGIS31~1.11\apps\Python39\DLLs

·C:\PROGRA~1\QGIS31~1.11\apps\Python39\lib

·C:\Program Files\QGIS 3.16.11\bin

·C:\PROGRA~1\QGIS31~1.11\apps\Python39

·C:\PROGRA~1\QGIS31~1.11\apps\Python39\lib\site-packages

·C:\PROGRA~1\QGIS31~1.11\apps\Python39\lib\site-packages\win32

·C:\PROGRA~1\QGIS31~1.11\apps\Python39\lib\site-packages\win32\lib

·C:\PROGRA~1\QGIS31~1.11\apps\Python39\lib\site-packages\Pythonwin

·C:/Users/daves/AppData/Roaming/QGIS/QGIS3\profiles\default/python

·C:\Users\daves\AppData\Roaming\QGIS\QGIS3\profiles\default\python\plugins\DigitizingTools\tools

·C:\Users\daves\AppData\Roaming\QGIS\QGIS3\profiles\default\python\plugins\DigitizingTools

·C:\Users/daves/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\qgis_resource_sharing

·C:\Users\daves\AppData\Roaming\QGIS\QGIS3\profiles\default\python\plugins\qgis_resource_sharing

C:\Users\daves\AppData\Roaming\QGIS\QGIS3\profiles\default\python\plugins\qgis_resource_sharing\ext_libs

==

LOG

2021-09-28T16:15:33 WARNING dir = 
C:/Users/daves/AppData/Roaming/QGIS/QGIS3/profiles/default/python/plugins/DigitizingTools


2021-09-28T16:15:40     INFO Application state:
             QGIS_PREFIX_PATH env var: 
C:/PROGRA~1/QGIS31~1.11/apps/qgis-ltr

             Prefix: C:/PROGRA~1/QGIS31~1.11/apps/qgis-ltr
             Plugin Path: C:/PROGRA~1/QGIS31~1.11/apps/qgis-ltr/plugins
             Package Data Path: C:/PROGRA~1/QGIS31~1.11/apps/qgis-ltr/.
             Active Theme Name: default
             Active Theme Path: 
C:/PROGRA~1/QGIS31~1.11/apps/qgis-ltr/./resources/themes\default\icons/

             Default Theme Path: :/images/themes/default/
             SVG Search Paths:
C:/Users/DJAddy/AppData/Roaming/QGIS/QGIS3\profiles\default/svg/
              D:/My Pictures/QGIS Projects/Mapbox svg 
icons/mapbox-maki-6.2.0-0-ga6d16d4

              C:/PROGRA~1/QGIS3~1.10/apps/qgis/./svg/
              C:/PROGRA~1/QGIS3~1.10/apps/qgis-ltr/./svg/
              C:/PROGRA~1/QGIS3~1.16/apps/qgis/./svg/
              C:/PROGRA~1/QGIS3~1.16/apps/qgis-ltr/./svg/
              C:/PROGRA~1/QGIS31~1.11/apps/qgis-ltr/./svg/
C:/Users/daves/AppData/Roaming/QGIS/QGIS3\profiles\default/svg/
             User DB Path: 
C:/PROGRA~1/QGIS31~1.11/apps/qgis-ltr/./resources/qgis.db
             Auth DB Path: 
C:/Users/daves/AppData/Roaming/QGIS/QGIS3\profiles\default/qgis-auth.db



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Re: [Qgis-user] QGIS 3.20 Crash

[Stefan Giese (WhereGroup)]

Hi Raymond,

thank's for sharing your thoughts on that!

At the moment we are working on a Profile Mananger Plugin which allows 
you to get things from one to another profile like database connections, 
plugins, expressions and so on. But a more generic solution would be 
great anyway!!


Best

Stefan

Am 06.10.2021 um 16:33 schrieb Raymond Nijssen:

Good question!

I'm seeing this 'try a new profile' solution more and more often. And 
it's a great way to figure out if QGIS is really broken, or that it's 
just a corrupt profile for some reason.


But profiles don't get broken by the users, they get broken by (bugs 
in) the software. And working with a new profile can be very 
inconvenient, cause plugins, configurations and links to recent 
projects/crs's/expressions/etc are missing.


Could we think of ways to:
- gather corrupt profiles and find bugs in it?
- identify plugins that (often) corrupt profiles?
- fix corrupt profiles?
- anything else?

Kind regards,
Raymond


On 06-10-2021 16:05, Martin Bittens wrote:

Yes, it worked. Using the new profile QGIS did not crash. But...

1.) How do I get all my settings and plug-ins from the previous 
profile into the new one?


2.) How do I get QGIS running always with the new profile when I 
start-up?  Do I need to delete the old profile?



Regards


Martin


Am 10/6/2021 um 10:36 AM schrieb Stefan Giese (WhereGroup):


Did you try it also with a new profile?

Just make a new prrofile and test it again: Menu->Settings->User 
Profiles->New Profile


If QGIS don't chrashes again, then your user profile is corrupt...

Am 06.10.2021 um 15:28 schrieb Martin Bittens:


Hello QGIS users.

Since a couple of days QGIS 3.20 crashes when I am closing the 
program. The following crash report appears:



Crash ID: 2bba35ac54ec3f66db08369439704d5a7beb5523 
<https://github.com/qgis/QGIS/search?q=2bba35ac54ec3f66db08369439704d5a7beb5523&type=Issues>



Stack Trace

GDALDestroyDriver : dal::GDALRasterDriver::deregisterGDALDrivers : 
dal::Client::~Client : calc::DataStorageId::setId : ::operator() : 
__crt_seh_guarded_call::operator(), &, > : execute_onexit_table : 
calc::vs2CsfVs : calc::vs2CsfVs : LdrpCallInitRoutine : 
LdrShutdownProcess : RtlExitUserProcess : ExitProcessImplementation 
: exit_or_terminate_process : common_exit : BaseThreadInitThunk : 
RtlUserThreadStart :





QGIS Info
QGIS Version: 3.20.3-Odense
QGIS code revision: 495fbaec
Compiled against Qt: 5.15.2
Running against Qt: 5.15.2
Compiled against GDAL: 3.3.1
Running against GDAL: 3.3.1



System Info
CPU Type: x86_64
Kernel Type: winnt
Kernel Version: 10.0.19043



Any idea what is going wrong?


Regards


Martin




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Re: [Qgis-user] QGIS 3.20 Crash

[Stefan Giese (WhereGroup)]

first go to Menu->Settings->User Profiles->open active profile folder

then go one folder up...you will see all the profiles. The profile.ini 
shows your default profile which you can change


a profile folder looks like this one:

now you can copy things from one folder to the other...at the moment I 
don't know a better way. We are working on a Profile manager plugin to 
make this easier, which should be ready soon


Am 06.10.2021 um 16:05 schrieb Martin Bittens:


Yes, it worked. Using the new profile QGIS did not crash. But...

1.) How do I get all my settings and plug-ins from the previous 
profile into the new one?


2.) How do I get QGIS running always with the new profile when I 
start-up?  Do I need to delete the old profile?



Regards


Martin


Am 10/6/2021 um 10:36 AM schrieb Stefan Giese (WhereGroup):


Did you try it also with a new profile?

Just make a new prrofile and test it again: Menu->Settings->User 
Profiles->New Profile


If QGIS don't chrashes again, then your user profile is corrupt...

Am 06.10.2021 um 15:28 schrieb Martin Bittens:


Hello QGIS users.

Since a couple of days QGIS 3.20 crashes when I am closing the 
program. The following crash report appears:



Crash ID: 2bba35ac54ec3f66db08369439704d5a7beb5523 
<https://github.com/qgis/QGIS/search?q=2bba35ac54ec3f66db08369439704d5a7beb5523&type=Issues>



Stack Trace

GDALDestroyDriver : dal::GDALRasterDriver::deregisterGDALDrivers : 
dal::Client::~Client : calc::DataStorageId::setId : ::operator() : 
__crt_seh_guarded_call::operator(), &, > : execute_onexit_table : 
calc::vs2CsfVs : calc::vs2CsfVs : LdrpCallInitRoutine : 
LdrShutdownProcess : RtlExitUserProcess : ExitProcessImplementation 
: exit_or_terminate_process : common_exit : BaseThreadInitThunk : 
RtlUserThreadStart :





QGIS Info
QGIS Version: 3.20.3-Odense
QGIS code revision: 495fbaec
Compiled against Qt: 5.15.2
Running against Qt: 5.15.2
Compiled against GDAL: 3.3.1
Running against GDAL: 3.3.1



System Info
CPU Type: x86_64
Kernel Type: winnt
Kernel Version: 10.0.19043



Any idea what is going wrong?


Regards


Martin




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Re: [Qgis-user] QGIS 3.20 Crash

[Stefan Giese (WhereGroup)]

Did you try it also with a new profile?

Just make a new prrofile and test it again: Menu->Settings->User 
Profiles->New Profile


If QGIS don't chrashes again, then your user profile is corrupt...

Am 06.10.2021 um 15:28 schrieb Martin Bittens:


Hello QGIS users.

Since a couple of days QGIS 3.20 crashes when I am closing the 
program. The following crash report appears:



Crash ID: 2bba35ac54ec3f66db08369439704d5a7beb5523 




Stack Trace

GDALDestroyDriver : dal::GDALRasterDriver::deregisterGDALDrivers : 
dal::Client::~Client : calc::DataStorageId::setId : ::operator() : 
__crt_seh_guarded_call::operator(), &, > : execute_onexit_table : 
calc::vs2CsfVs : calc::vs2CsfVs : LdrpCallInitRoutine : 
LdrShutdownProcess : RtlExitUserProcess : ExitProcessImplementation : 
exit_or_terminate_process : common_exit : BaseThreadInitThunk : 
RtlUserThreadStart :





QGIS Info
QGIS Version: 3.20.3-Odense
QGIS code revision: 495fbaec
Compiled against Qt: 5.15.2
Running against Qt: 5.15.2
Compiled against GDAL: 3.3.1
Running against GDAL: 3.3.1



System Info
CPU Type: x86_64
Kernel Type: winnt
Kernel Version: 10.0.19043



Any idea what is going wrong?


Regards


Martin




 
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Re: [Qgis-user] Rule-based symbol for point within polygon in QGIS

[Stefan Giese (WhereGroup)]

yes sure...I can post it on your question.

Am 31.08.2021 um 07:25 schrieb Jeanneret Cédric:


Thank you very much Stefan, it works !

I couldn’t find the correct syntax, and didn’t know the difference 
between the expression parameter and the filter parameter.


I posted that question on stack.exchange earlier : I wanted to use 
your answer to respond to my initial post. Tell me please if you mind.


Here’s the link

https://gis.stackexchange.com/questions/409455/rule-based-symbol-for-point-within-polygon-in-qgis 



Cédric Jeanneret


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Re: [Qgis-user] Rule-based symbol for point within polygon in QGIS

[Stefan Giese (WhereGroup)]

Depends on your QGIS version, from 3.16 onwards you can use the 
overlay-functions to proof if the point and polygonlayer are in a 
spatial relation like intersects or touches and so on. The expression 
for your first rule will be like this one:


/"VAL_PROTECTION_EP3" = '1' AND  "TYPE"  = 1 AND overlay_intersects( 
layer:='pol', filter := ("TYPE" in ('P','E') AND "CAT_CANTON" = 2) OR 
("TYPE" in ('P','E') AND "CAT_CANTON" = 3))/


In the overlay_intersects-part you have to change the layername to your 
polygon layer.


If you have an older QGIS Version you can achieve the more or less same 
result with the refFunctions Plugin.


Hope this helps

Best regards

Stefan

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Am 30.08.2021 um 16:36 schrieb Jeanneret Cédric:


I would like to use a set of rules to draw features from a point_layer 
that are within a polygon_layer.


Points that answer true to

("VAL_PROTECTION_EP3" = '1' AND  "TYPE"  = 1)

and that are within polygons that answer true to

("TYPE" in ('P','E') AND "CAT_CANTON" = 2) OR ("TYPE" in ('P','E') AND 
"CAT_CANTON" = 3)


should be displayed as red dots

Points that answer true to

("VAL_PROTECTION_EP3" = '2' AND  "TYPE"  = 1)

and that are within polygons that answer true to

("TYPE" in ('P','E') AND "CAT_CANTON" = 2) OR ("TYPE" in ('P','E') AND 
"CAT_CANTON" = 3)


should be displayed as orange dots

Points that answer true to

("VAL_PROTECTION_EP3" = '3' AND  "TYPE"  = 1)

and that are within polygons that answer true to

("TYPE" in ('P','E') AND "CAT_CANTON" = 1)

should be displayed as yellow dots

I cannot find the right combination of expressions for the rule to work.

Any help would be appreciated: what would a working syntax be for such 
a rule to work in QGIS Layer Styling panel ?


Cédric Jeanneret


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Re: [Qgis-user] Python for qgis

[Stefan Giese (WhereGroup)]

and very helpful for beginners is Anita Graser's Blog on PyQGIS. 
https://anitagraser.com/pyqgis-101-introduction-to-qgis-python-programming-for-non-programmers/


Am 21.08.2021 um 17:51 schrieb Alexandre Neto:

Check QGIS documentation. Mainly the PyQGIS Cookbook:

https://docs.qgis.org/3.16/en/docs/pyqgis_developer_cookbook/index.html 



PyQGIS Api:

https://qgis.org/pyqgis/3.16/ 

And there's a dedicated book:

https://locatepress.com/book/ppg3 

Alexandre Neto
User Support
www.qcooperative.net 






A sábado, 21/08/2021, 16:18, Alexandru Munteanu 
mailto:aldru.munte...@gmail.com>> escreveu:


Hi community!

I am wondering if you can help me with information / resources
where i learn using Python for qgis. I have taken a basic course
on Python, but i am sure I need to extend my knowledge on how to
apply it in qgis.

Thank you in advance for any help you can provide and sources
where I can find more information on that.

Best,
Alex
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Re: [Qgis-user] Expression to read field value from composer layout?

[Stefan Giese (WhereGroup)]

here is a function which does the job. It's a bit more generic, you have 
to pass the layoutname and the itemID to get the text:


/from qgis.core import *//
//from qgis.gui import *//
//
//@qgsfunction(args='auto', group='Custom')//
//def get_layout_textitem(layoutTitle, itemId, feature, parent)://
//    """//
//    Gets the text from a labelitem in the layout with the name 
layoutTitle.//

//    Example usage://
//    //
//  get_layout_textitem('Layout 1', 'text1') -> 'lorem ipsum//
//    //
//    """//
//
//    project = QgsProject.instance()//
//    projectLayoutManager = project.layoutManager()//
//    layout = projectLayoutManager.layoutByName(layoutTitle)//
//
//    fileNameLabel = layout.itemById(itemId)//
//    fileNameText = fileNameLabel.text() //
//    return fileNameText/

//

Am 04.08.2021 um 14:06 schrieb Patrick Dunford:

layoutTitle = "Landscape 16:9 Header Nav Copyright Filename 2021"

project = QgsProject.instance()
projectLayoutManager = project.layoutManager()
layout = projectLayoutManager.layoutByName(layoutTitle)

fileNameLabel = layout.itemById('Filename')
fileNameText = fileNameLabel.text() 


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Re: [Qgis-user] Expression to read field value from composer layout?

[Stefan Giese (WhereGroup)]

Hi Patrick,

I think that you can not get the text from the label with the 
item_variables function. The keys are limited to the predefinded 
variables like:


_project_transform_context,item_id,item_uuid,layer_ids,layers,layout_dpi,layout_name,layout_numpages,layout_page,layout_pageheight,layout_pageoffsets,layout_pagewidth,miles_km,project_abstract,project_area_units,project_author,project_basename,project_creation_date,project_crs,project_crs_acronym,project_crs_definition,project_crs_description,project_crs_ellipsoid,project_crs_proj4,project_crs_wkt,project_distance_units,project_ellipsoid,project_filename,project_folder,project_home,project_identifier,project_keywords,project_last_saved,project_path,project_title,project_units,qgis_locale,qgis_os_name,qgis_platform,qgis_release_name,qgis_short_version,qgis_version,qgis_version_no,test,user_account_name,user_full_name

But you can use your own variable like filename and access it from anywhere:



Am 04.08.2021 um 13:27 schrieb Patrick Dunford:


I'm looking through the documentation and there is this example:


  14.2.2.13. Layout Functions
  


This group contains functions to manipulate print layout items properties.

Function



Description

item_variables



Returns a map of variables from a layout item inside this print layout

*An example:*

 *

Get the scale of the ‘Map 0’ in the current print layout:

map_get(  item_variables('Map 0'),  'map_scale')


How do I find out how to get the text value of the layout item 
"Filename" on the current print layout?



On 4/08/21 2:40 pm, Patrick Dunford wrote:
It is just an ordinary text field on a composer layout I think. I 
don't use the atlas functionality.


On 4/08/21 10:19 am, Nyall Dawson wrote:
On Wed, 4 Aug 2021 at 06:17, Patrick Dunford 
 wrote:

Good day

I am wishing to create a value in a field on a composer layout that
reads the value of another field on the layout and calculates a 
value to

be displayed.

For example, I have an existing field called Filename on the layout 
and
in a python script running in the main window console, I have this 
code

that reads the value of the Filename field as follows:

layoutTitle = "Landscape 16:9 Header Nav Copyright Filename 2021"

project = QgsProject.instance()
projectLayoutManager = project.layoutManager()
layout = projectLayoutManager.layoutByName(layoutTitle)

fileNameLabel = layout.itemById('Filename')
fileNameText = fileNameLabel.text()


Obviously I am hoping that doing this from a field within the layout
that reads another field on the same layout will be much simpler than
the above. How exactly would I achieve that?

Just to clarify -- by "field" do you mean "a field value from the
atlas layer", or "a text label item"?

Nyall


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Re: [Qgis-user] Scalebar segments always go to 2 displayed on units change

[Stefan Giese (WhereGroup)]

in QGIS 3.20.1 the behaviour is still the same.

Didn't found anything on 
https://github.com/qgis/QGIS/issues?q=is%3Aissue+is%3Aopen+label%3ABug+label%3A%22Print+Layouts%22+scalebar


so the best is to make a new issue on https://github.com/qgis/QGIS/issues

Am 03.08.2021 um 01:56 schrieb Jeff Sonnentag:


I don’t know what a person would search for in the “issues” or 
“commits” to see if this is already known or fixed, but it is an 
annoyance (nothing particularly critical).


Anyway, in a Layout once you have Units set and Segments set to 4 (or 
anything other than 2) and then you change the Units to something else 
the number of Segments still says 4 in that option but the displayed 
Scalebar only shows 2 Segments.  To get things right you just have to 
increment up or down and then back to what you want for number of 
segments and the displayed Scalebar switches to what is actually in 
the Segments option.


Does anybody know if it is already taken care of in something newer 
(using 3.16.9 here) or if it is already known/reported?



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Re: [Qgis-user] QGIS 3.20.xx Win x86 release

[Stefan Giese (WhereGroup)]

I don't think so - QGIS 3.18 and newer versions will not be supported by 
a x86 32bit Windows plattform, see: 
https://blog.qgis.org/2020/10/15/phasing-out-32-bit-support-in-qgis/


Am 02.08.2021 um 12:50 schrieb Yvan CALCAGNI:

Hi everyone,
I tried to find out on my own but without success... Does any QGIS 
3.20 installer exists on Win x86? I'm in need because I'm using 
datasources from old database system whose drivers only exist on that 
plateform.


Thank you guys!


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Re: [Qgis-user] Import Kmz without losing the symbology

[Stefan Giese (WhereGroup)]

unfortunally I didn't read the whole feature description in the 
changelog, it says  "...Currently only supports line symbol conversion, 
but point and polygon symbol support is under development" may be 
that is the reason...


Am 14.07.2021 um 11:21 schrieb krishna Ayyala:

Stefan,
Thanks a lot for your reply. I have upgraded my QGIS version to 3.20 
and added the kmz file on to my map. Still I am getting the plain 
rectangle. I am not getting the symbology as it is in the original 
Kmz.Actually my Kmz has circles with colors inside it.


Regards.

On Tue, Jul 13, 2021 at 11:48 PM Stefan Giese (WhereGroup) 
mailto:stefan.gi...@wheregroup.com>> wrote:


Hi,

depends on the QGIS Version. QGIS 3.20 can render embedded styles
from kml/kmz

(https://www.qgis.org/en/site/forusers/visualchangelog320/index.html#feature-new-embedded-styling-renderer-with-ogr-feature-styles-support

<https://www.qgis.org/en/site/forusers/visualchangelog320/index.html#feature-new-embedded-styling-renderer-with-ogr-feature-styles-support>).

regards

Stefan

Am 14.07.2021 um 04:52 schrieb krishna Ayyala:

Hello,
I have a kmz. The Kmz has circles with different colors in it.
When I add the kmz to QGIS map, I am getting a plain rectangle.
How to add this kmz to the map by preserving all the symbology
and the colors.

Regards

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Re: [Qgis-user] Import Kmz without losing the symbology

[Stefan Giese (WhereGroup)]

Hi,

depends on the QGIS Version. QGIS 3.20 can render embedded styles from 
kml/kmz 
(https://www.qgis.org/en/site/forusers/visualchangelog320/index.html#feature-new-embedded-styling-renderer-with-ogr-feature-styles-support).


regards

Stefan

Am 14.07.2021 um 04:52 schrieb krishna Ayyala:

Hello,
I have a kmz. The Kmz has circles with different colors in it. When I 
add the kmz to QGIS map, I am getting a plain rectangle. How to add 
this kmz to the map by preserving all the symbology and the colors.


Regards

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Re: [Qgis-user] Did you know this about GeoPackage layers?

[Stefan Giese (WhereGroup)]

Thanks for sharing this...didn't know this feature, but it works!

Best regards

Stefan

Am 12.07.2021 um 19:53 schrieb Drew French:
Did you know that you can copy polygons in a geopackage polygon layer 
and paste those polygons as lines in geopackage line layer? I did not 
know you could do that, but just found out that you can! Very handy, 
simply Ctrl C, Ctr V.


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Re: [Qgis-user] question on advanced digitizing

[Stefan Giese (WhereGroup)]

For perfect squares better use the "Shape Digitizing Toolbar"

Am 05.05.2021 um 20:38 schrieb Gabriel Cotlier:

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] convex and concave areas

[Stefan Giese (WhereGroup)]

one process could be:

 * smooth the DTM by a neigbourhood analysis. The width depends on the
   size of your convex and concave areas. you can use a mean filter or
   lowpass for example
 * substract the filtered from the original
 * select values > or < your cutoff
 * convert this into polygons

see 
https://www.researchgate.net/profile/Hazen-Russell/publication/277324326_A_semi-automated_esker_detection_method_EDM_for_improved_quantification_of_glaciated_landscapes/links/5567b6ca08aeab77721eac23/A-semi-automated-esker-detection-method-EDM-for-improved-quantification-of-glaciated-landscapes.pdf 
for further reading


Hope this helps

Stefan

Am 05.05.2021 um 10:02 schrieb Azzurra Lentini:

Hi list,
I need to find the convex and concave areas from a dtm raster file. Do 
you have any suggestions?

Thanks

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Re: [Qgis-user] Folder .qgis2 - not used any more by QGIS 3 ?

[Stefan Giese (WhereGroup)]

Hi Christine,

yes that is moved to the profile folder you've found. It has similar 
functions but also much more possibilities. You can work with different 
profiles (English, German and so on) and if you want to start with a 
complete new QGIS - just make a new profile. There is stored nearly 
everything, data connections, styles DB, ini file and so on. Start here 
for more information: 
https://docs.qgis.org/3.10/en/docs/user_manual/introduction/qgis_configuration.html#working-with-user-profiles 
or see this blog: 
https://www.northrivergeographic.com/archives/qgis-profiles


Best regards

Stefan

Am 13.04.2021 um 16:20 schrieb Christine:

Dear QGIS community,

recently I was surprised in QGIS 3.16 and QGIS 3.18 by missing some menu
items. Solved this.

But while searching for the reason and a solution of the QGIS GUI behaviour
I checked for the folder '.qgis2' as a matter of routine - and couldn't 

find

it any more on my system. Compared this to other installations of QGIS 3.x
under Windows, where I still found this folder in the expected path, but
maybe these are leftovers from earlier versions.

Does QGIS 3 doesn't use this folder any more for saving GUI settings under
Windows?
Have found a file 'qgis.ini' in the path
'C:\Users\\AppData\Roaming\QGIS\QGIS3\profiles\default\QGIS', that I
suspect to have a similar function.

Thanks for a feedback of someone who knows more to lighten this up !
Regards, Christine



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Re: [Qgis-user] saving all temporary layers?

[Stefan Giese (WhereGroup)]

Hi David,

you should have a look to this one:

https://gis.stackexchange.com/a/323288/87346

the lower part of the script starting from /#write this layers into 
geoPackage/ will do the job.


Am 21.01.2021 um 19:41 schrieb David Strip:
Before I write my own, does anyone have a script to share (processing 
or otherwise) that saves all temporary layers in a project, preferably 
to a geopackage?

Thanks
David

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Re: [Qgis-user] Public vector tile servers

[Stefan Giese (WhereGroup)]

Hi David,

we have setted up one OSM vector tile service (Germany) for testing or 
private use only:


https://wms.wheregroup.com/tileserver/tile/tileserver.php?/germany.json?/germany/{z}/{x}/{y}.pbf

Style: https://wms.wheregroup.com/tileserver/style/osm-bright.json

Best regards

Stefan

Am 23.12.2020 um 17:21 schrieb qgis-u...@stripfamily.net:
Is there a list somewhere of publicly available vector tile servers, 
esp. ones with free tiers of service? My Google skills don't see to be 
up to the task of finding one.

Thanks

David


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Re: [Qgis-user] Set variables by UI

[Stefan Giese (WhereGroup)]

you can use one of the signals emitted by a QgsVectorLayer, for example 
|attributeAdded| 
 
or |afterCommitChanges| 
 
(see https://qgis.org/pyqgis/3.14/core/QgsVectorLayer.html) for the 
whole list of signals. Then you will need a python script to connect a 
slot (function) to that signal doing what you wanted to be done with 
your layer(s). at least you will need a place where to put your function 
in and connect it to the signal, this can be done manual from the 
console or you can put in the open project macro or in a 
startup.py...this depends what you want to achieve. I described  a bit 
different example in this post on stackexchange: 
https://gis.stackexchange.com/questions/379781/forcing-choice-for-default-value-during-data-entry/379827#379827 
but it will show you, how you can start with signals and slots.


hope this helps a bit

Stefan

Am 25.11.2020 um 22:43 schrieb L.W.:


That's what I want to use, but how to set the "default value" - no, 
not per propertier and form builder.


I want to set the DV by input in "UI A" (add feature to layer A) and 
then add new feature to B, and in UI B the DV is set to value from form A.



Am 25.11.2020 um 21:19 schrieb Harrissou:

Hi,
Something like setting default values for field: 
https://docs.qgis.org/3.16/en/docs/user_manual/working_with_vector/vector_properties.html#default-values 
 
?


Regards,
Harrissou

Le 25 novembre 2020 20:49:17 GMT+01:00, "L.W."  a 
écrit :


Hello,

I have a question again, I know the possibility of the project
variables, which can be queried from all layers.
I have to insert several points and lines or polygons in different layers.
All inserted features have in common that they have certain attributes
that are the same for all.
It would be nice if I only have to enter these common attributes for the
first feature and the values ​​are then automatically inserted as
default values ​​for each new feature.
One possible way would of course be a link to a shared data table, but I
don't necessarily want to go this way for reasons.
I know the option of giving a UI a Python script when it is opened (even
if I can't Python), but I haven't found anything to execute a script
after closing, for example.
Obviously logical, you can of course set the variables beforehand, but
that would be another step that you have to take beforehand and you
cannot get to these variables without a whole series of mouse clicks.

Any ideas?

Regards

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Re: [Qgis-user] How to get the thickness of a geol. layer from elevation isoline features

[Stefan Giese (WhereGroup)]

Hi Eva,

welcome to the list. You asked a plenty of questions, so it would be
easier to start with some links on the web:

  * Stackoverflow discussion on that:

https://gis.stackexchange.com/questions/60228/generating-dem-from-contour-shapefile-using-qgis
  * a GRASS Tutorial: https://grasswiki.osgeo.org/wiki/Contour_lines_to_DEM
  * and a short youtube tutorial:
https://www.youtube.com/watch?v=PhJ77uHlTJA

Hope this helps

Stefan

Am 03.11.2020 um 14:39 schrieb fanty...@web.de:
>
> Hi all,
>
> I have the following task:
>
> I need to create a map with contour lines showing the thickness of one
> geological layer/horizon (actually not the true thickness, but the
> vertical extent is required, so if you drill down at one point, what
> is the distance between the upper and lower edge of the horizon).
>
> The only data I have are two line features (shape files) of isolines
> with elevation values (in m NHN) of each the upper edge and lower edge
> of the horizon.
>
> My approach would be something like this, but I can’t figure out how
> exactly to do it:
>
>   * Create a raster from each line feature (did that, but only the
> lines are rastered, so would need a polygon to get a plane? How do
> that? How can I include the elevation values of the lines into the
> polygon?)
>   * Interpolate the elevation values inbetween the isolines to receive
> a plane of elevation values (in my opinion would need a polygon to
> get a plane, but for interpolation input Points are needed? And
> which interpolation method? Also, some of the isolines are offset
> by faults, so need sharp edges in these areas, how to integrate
> that in the interpolation?)
>   * Then calculate the vertical distance at each point in the area
> between the two planes to get the thickness (how, which tool does
> that?)
>   * Create a raster showing the thickness throughout the area in
> colour range
>   * Add contour lines showing the thickness of the horizon
>
> Maybe there is even a better and probably much simpler way to do this.
> However, I am only a beginner in QGIS, python and statistics. So any
> help and easy to understand tips will be very much appreciated. I am
> using QGIS 3.10.11 by the way.
>
> Best regards,
>
> Eva
>
>
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Re: [Qgis-user] module 'qgis.processing' has no attribute 'run'

[Stefan Giese (WhereGroup)]

Miguel

or you can use also "processing.runAndLoadResults(...)" to load the
result directly into QGIS

regards

Stefan

Am 07.07.2020 um 06:25 schrieb Christoph Jung:
> Hi Miguel,
>
> You call the run-method on an variable called „general“. But using the
> processing framework will be realised by calling
> “processing.run(...)”. Maybe this is the problem?
>
> Sincerely,
> Christoph
>
>> Am 07.07.2020 um 00:18 schrieb Miguel Eduardo Rincon De Hoyos
>> :
>>
>> 
>>
>> Dears members
>>
>> I am using Python for my postgraduate studies and I am having trouble
>> running my code when I try to use processing in Qgis using the
>> command-line interface.
>>
>> I think the error is really easy to fix it but right now I do not
>> know how to fix it. When I run my code I have this
>>
>> |Traceback(most recent call last):File"urban_canopy_element.py",line
>> 100,inoutput=general.run('qgis:clip',{'INPUT':input_layer,\
>> NameError:name 'run'isnotdefined |
>> |Thanks for the help |
>> |Regards |
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Re: [Qgis-user] open street map data in QGIS 3.12

[Stefan Giese (WhereGroup)]

Hi Andre,

did you try the key:value: shop:supermarket instead

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Am 29.06.2020 um 20:44 schrieb Andre Ulrich:
> Dear community,
>
> I have to create a shape file containing all supermarkets in cologne.
> Therefore I want to use data from open street maps. I have already
> installed the (experimental) plugin "QuickOSM" for enabling queries on
> osm data directly in QGIS.
> For the query I have to pass a key and a value. According to
> https://wiki.openstreetmap.org/wiki/Key:building
> there should be a value "supermarket" belonging to the key "building".
> In the QuickOSM-window I can choose the key "building" - fine. But
> when it comes to the value, I can't choose "supermarket" - it's not
> even listed (and I can't type it too). There are other values like
> "commercial", "industrial" or "retail", which might also fit. But a
> query using these values yields way too many results. I really only
> want to have supermarkets like rewe or penny or lidl or aldi or
> something like those.
>
> I also have downloaded a shape containing all buildings in
> "Regierungsbezirk Köln" from
> http://download.geofabrik.de/europe/germany/nordrhein-westfalen.html
> as shp.zip.
> There are 2.5M objects in this shape. I have tried to filter them,
> using the attribute tabel -> select by expression. Everytime I try to
> filter these data my computer ends up crashing.
> I only see this loading symbol where my cursor is supposed to be. When
> I stop the programme manually I only get to see this error message
> (also in picture attached).
>
> Does anyone have a clue, where to get good data for my purposes
> (supermarkets in cologne)?
> Or should I simply wait longer for QGIS to filter these 2.5M objects
> (although I have waited for 30 minutes or so)?
>
> Thanks for your efforts in advance!
> many greetings!
> André
>
> *
> QGIS 3.12.3-Bucuresti
> installed with OSGeo4W
> Windows 10 Pro
> *
>
>
>
>
> -- 
> Andre Ulrich
> Email: andre.ulrich63...@gmail.com 
>
>
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Re: [Qgis-user] Graphical Modeler and point entry

[Stefan Giese (WhereGroup)]

Hi,

find a short explanation-animation how to proceed here:
https://files.wheregroup.com/index.php/s/GbD5Y4YZfjGzM6t

best

Stefan

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Am 05.06.2020 um 10:15 schrieb neus querol:
> Hi,
>
> I am using the Graphical modeler tool and I would like to use a Point
> entry to get the point coordinates in the map to add in the network
> analysis as a start point. 
>
> I have added the Point entry into Graphical Modeler, I can click on
> the map but I don't get any coordinates. 
>
> thanks in advance.
> Neus  
>
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Re: [Qgis-user] WRF-Hydro

[Stefan Giese (WhereGroup)]

Hi Marcelo,

if you have a look to the error message - python error messages should 
be read strating from the end, you will see the last message: 
/ModuleNotFoundError: No module named 'arcpy'/


This means, that the 'arcpy' module is not present in QGIS. Arcpy is the 
main module of ArcGis, which binds ArcGis to the Python ecosystem. So no 
chance to get this as it is into QGIS. The only thing you can do is, to 
have a look to the arcpy classes and functions in the script and replace 
them with QGIS classes and functions, which should be possible but will 
need some manual work to do. I've done this before with other tools and 
it is not that big thing to convert it towards QGIS


Good luck and best regards

Stefan

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//

Am 20.04.2020 um 22:13 schrieb Marcelo Romero de Moraes:

Hello Everybody,

I am trying to run WRF-Hydro scripts in QGIS. I got this error with 
Terminal Python:


/exec(open('C:/Users/Carla/Desktop/wrf_hydro_arcgis_preprocessor-5.1.1/wrf_hydro_functions.py'.encode('utf-8')).read())
Traceback (most recent call last):
  File "C:\PROGRA~1\QGIS3~1.12\apps\Python37\lib\code.py", line 90, in 
runcode

    exec(code, self.locals)
  File "", line 1, in 
  File "", line 26, in 
  File "C:/PROGRA~1/QGIS3~1.12/apps/qgis/./python\qgis\utils.py", line 
744, in _import

    mod = _builtin_import(name, globals, locals, fromlist, level)
ModuleNotFoundError: No module named 'arcpy'/


Anyone could help me ?

Thanks in advance!

Marcelo

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Re: [Qgis-user] Should be easy? Open csv in Graphical Modeller

[Stefan Giese (WhereGroup)]

Hi Morten,

I have made a python algorithm which does more or less exactly what you 
want. You only have to adjust the field definitions in the function def 
processAlgorithm. The script was original written to import ground 
penetrating radar data. If you import it into the processing toolbox, 
you can use it later also for a model step in the graphical modeller


you can download it from here: 
https://files.wheregroup.com/index.php/s/CM75A5W66zjqrw2


Hope this helps

Stefan

Am 31.03.2020 um 08:47 schrieb magerlin:

I am fighting with this simple task: I want to create a model that from a
completely blank project opens a csv point file (as a start for further
modelleing).

Following these instructions I can only make it work if csv file is already
added to the project as a table with no geometry:
https://gis.stackexchange.com/questions/280059/csv-list-as-input-parameter-in-qgis-3-0-processing-modeler

If I select an external csv file I get this error: Incorrect Parameter value
for shapetxtfile

The very simple model3 file is here:
Shapes.model3





-
Regards Morten

Currently using Qgis 3.10.0
Windows 10, 64bit
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Re: [Qgis-user] Editing a Layer Category

[Stefan Giese (WhereGroup)]

Hi Dave,
you can have a look to this animated gif, may be it answers your 
question...I'm not sure, if I understood it completly;-)

https://files.wheregroup.com/index.php/s/QnGBnTbptFrdzZB

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Am 2019-12-26 09:09, schrieb Dave Gardiner:
How do I add a new polygon feature to a categorized layer and assign 
its

pattern and attributes to be chosen from a categorical attribute field.
Every time I try to add a feature it classifies a new category. I don't 
know
how to "toggle edit" onto an existing category in the category list. 
Thank

you.




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Re: [Qgis-user] Advanced Digitizer tool

[Stefan Giese (WhereGroup)]

Hi Norm,
to complete the answer from Andreas: when you start editing - even when 
your layer is in UTM - the advanced tools will be greyed out until you 
select the "Add Line Feature" tool to digitize a new line...see attached 
animated gif


best
stefan

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Am 2019-12-10 20:39, schrieb Andreas Neumann:

Hi Norm,

Did you make your layer "active"? QGIS needs an active layer to make
the toolbars active. And they need read-write access permissions.

Greetings,

Andreas
Am 10.12.19 um 20:10 schrieb upl...@mcsnet.ca:


For some reason my Advanced digitizer tool is greyed out so I cannot
activate it.  My project is set to a UTM coordinate system and my
layer is a polyline shapefile.  Why can’t I get this tool to work?


Norm

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Re: [Qgis-user] How do I manually input lat. long. data into cvs format and convert to a vecter point file?

[Stefan Giese (WhereGroup)]

Hi Don,
can you provide more information on your problem like:
- what are the errors, what did fail exactly?
- can you provide some example data in your choosen format?
- how did you import the data?

best
Stefan

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Am 2019-12-10 04:20, schrieb Donald Meier:

We have been trying to enter lat. long. coordinates in order to
georeference some local survey points. When we manually enter either
degree, minute, second or decimal degree into Excel and convert to a
vector point file the conversion fails. Any recommendations?

Don
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Re: [Qgis-user] Printing labelled vector maps in QGIS 3

[Stefan Giese (WhereGroup)]

Hi Larissa,
sure you can, have a look to:
https://docs.qgis.org/3.4/en/docs/training_manual/vector_classification/label_tool.html
and
https://docs.qgis.org/3.4/en/docs/training_manual/map_composer/map_composer.html

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Am 2019-11-18 13:51, schrieb Larissa Junek:

Hello folks,

I'd like to know if there is a possibility to print a map with the
labels of a shapefile vector layer with the print composer.

Maybe I don't have the right procedure so far.

Cheers, Larissa


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Re: [Qgis-user] New QGIS windows packages

[Stefan Giese (WhereGroup)]

Hi Jürgen,
thanks a lot...just on point for our qgis school next week!!

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Am 2019-11-11 18:37, schrieb Jürgen E. Fischer:

Hi,

new OSGeo4W packages and standalone installers[0] with support for GDAL 
3,0.1,

PROJ 6.2.1 and GRASS 7.8.1 are out.

So the GeoPDF creation in 3.10 should now also be available to Windows 
users.



Jürgen

[0] as always from the OSGeo4W packages.

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Re: [Qgis-user] QGIS 3.10 GeoPDF creation greyed out

[Stefan Giese (WhereGroup)]

this subject was also today at gis.stackexchange: 
https://gis.stackexchange.com/questions/340030/create-geospatial-pdf-geopdf-is-greyed-out-in-pdf-export-options-in-qgis-3-10


best regards
Stefan

Am 2019-10-28 18:18, schrieb Jürgen E. Fischer:

Hi Bo,

On Mon, 28. Oct 2019 at 17:24:03 +0100, Bo Victor Thomsen wrote:
That begs the 100.000 $ questions (maybe not, but a significant amount 
of

Euro's) :


Who can tell us if the present version of GRASS works with GDAL3 and 
PROJ6 ?


GRASS people can and have.  As previously referenced:

In https://github.com/OSGeo/grass/pull/136#issuecomment-535176075 
Markus Metz
states: proj 6 and gdal 3 are not yet supported, waiting for PR #118 to 
be

merged and backported.



And who will activate it in Windows QGIS 3.10 ??


That should be obvious.



And when ???


GRASS is maintained by GRASS people in OSGeo4W (ie. Martin Landa and 
Helmut
Kudrnovsky).  Once they update it, the next QGIS point release will 
pick it up.


Looks pretty close.  And I'm not sure that putting work into 
workarounds will

get us there any earlier as a little patience would.


(Is this a dark, sinister and secret plot to get more QGIS users 
switching

to Linux ? ;-)


There cannot be a dark or sinister plot to get more users to switch to 
Linux -

so no.

And now it's not even secret anymore ;)


Jürgen

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Re: [Qgis-user] Geology / formation database structure

[Stefan Giese (WhereGroup)]

Hi Matt,
so your are talking about a lithostratigraphic database. On 
chronostratigraphic handling in GIS and databases there is an 
interesting article here: 
https://repositorio.segemar.gob.ar/bitstream/handle/308849217/2128/asato-IAMG-2001.pdf 
(Efficient Chrono-Stratigraphic Database Structure in GIS)


Stefan

Am 2019-10-25 00:07, schrieb Matt Boyd:

Hi Stefan,
I had another look at midvatten it's not quite what I need.
I'm not sure this is how to explain it but I'll try. The way you
describe it treats stratigraphy as just another property at a layer. I
need the stratigraphic relationships, groups at top level, then
formation, then member in a stratigraphic database, which is then
linked to the "base data" properties you've described.

The idea is to force an internal consistency and enable me to check
data thats been entered.

Thanks
Matt

On Thu, Oct 24, 2019 at 8:32 PM Stefan Giese
 wrote:


Hi Matt,

did you have a look to the midvatten plugin (1), there you can
create a project database for geology data from drilholes. I didn't
use it so far, but I think it's worth have a look on.

Normally the basic construct should be a one to many relation
between base data and horizon data

base data (position, name, ...)   1 - n horizons ( upper depth,
lower depth, lithology, colour, fabric, texture, genesis,
stratigraphy...)

(1) https://github.com/jkall/qgis-midvatten-plugin/wiki

Best regards

Stefan

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Am 24.10.2019 um 01:55 schrieb Matt Boyd:


Hi QGISers,
possibly a little OT but do any of the geologists on the list know
of a pre-built structure for formation tops in well data?

I'm thinking a relational DB structure that is able to be filtered
by group / formation / member and provides more functionality than
spreadsheets and with a smaller footprint than the monolithic
geology databases that seem to be around.

I've started building this myself but I'm more of a user than a
designer.

Thanks
Matt

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Re: [Qgis-user] open window internet in qgis

[Stefan Giese (WhereGroup)]

Hi,
should be something like this one:

#opens an URL with a QWebview
from PyQt5 import QtCore
from PyQt5.QtCore import *
from PyQt5.QtWebKit import *
from PyQt5.QtWebKitWidgets import *
web = QWebView()
web.load(QUrl('http://wikipedia.org/wiki/[%name%]'))
web.show()

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Am 2019-10-23 19:28, schrieb Jose Mercedes Venegas Acevedo:

Hello everyone in the QGIS manual until 2.18 you could create an
action that directly opens a page in qgis with this code
from PyQt4.QtCore import QUrl; from PyQt4.QtWebKit import QWebView;
myWV = QWebView (None); myWV.load (QUrl ('http://wikipedia.org/wiki/
[% "name"%]')); myWV.show ()

I took that from this manual

https://docs.qgis.org/2.8/es/docs/training_manual/create_vector_data/actions.html
does anyone know how to write this code within the actions of qgis but
for version 3 I currently use qgis 3.8
Thank you

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cel Mov RPC 964185205
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Re: [Qgis-user] Movement patterns

[Stefan Giese (WhereGroup)]

Hi Taimur,
you can use the processing Toolbox and then the "points to path" 
algorithm. You can choose your input point layer, a order field (the 
time in your case) and a format string (optional) for your time format.


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Am 2019-10-15 07:52, schrieb Taimur al said:

Hi all,

 I have a series of GPS coordinate points and i would like to connect
these points using a line creating a movement pattern. These points
will connect using time and date for sequencing.

 Can someone help me figure how to present this data on Qgis.

 Regards,
 Taimur

_WILDLIFE BIOLOGIST _
_OFFICE FOR CONSERVATION OF THE ENVIRONMENT _
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Re: [Qgis-user] time in Attribute

[Stefan Giese (WhereGroup)]

the problem is the missing leading zero in your time format, it should 
be:  '07:13:45' instead of  '7:13:45'

you can use a small function to fill the time string with leading zeros:

from qgis.core import *
from qgis.gui import *

@qgsfunction(args='auto', group='Custom')
def fill_time(timestring, feature, parent):
list = timestring.split(':')
newtime = 
str(list[0]).zfill(2)+':'+str(list[1]).zfill(2)+':'+str(list[2]).zfill(2)

return newtime

and then you can use it in the expression like this:
to_time(fill_time('7:13:45'))

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Am 2019-10-03 00:42, schrieb RMG:

Hello,

I am trying to figure out the duration between one day's survey begin
time (e.g., 7:13:45) and end time (e.g., 9:39:53) in an attribute
table of a line shape file. It has just two attributes begin and end.
But $lengh returns an error message and cannot figure out the
duration. I suspect that the fields are not in proper format. So, I
try to update the fields with

to_time("begin")

Then, it says Eval Error: Cannot convert '7:13:45' to Time.

What is a remedy? The “begin” and “end” are in string.

Best wishes,

Reiko Matsuda Goodwin
Comoé Monkey Project [1]

Guenon Conservation Community [2]



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Re: [Qgis-user] Snapping Tool (Fangtool) not found in QGIS 3.8

[Stefan Giese (WhereGroup)]

Hi Alissa,
just enable the snapping Toolbar (Einrast Toolbar).

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Am 2019-09-13 13:27, schrieb Bauer, Alissa:

Dear fellow QGIS users,

I encountered a problem with finding the snapping tool (Fangen) for
vector layers in QGIS 3.8 (Zanzibar) on Windows 10, 64bit. Not only is
the tab ‚snapping options‘ under settings missing, but also the
sub-menu (Settings>Options>Digitizing) does not show any settings for
snapping.

Maybe I did not install the necessary plugins or I have to change
something in the general settings, but any help/tips/ideas would be
highly appreciated as I am absolutely clueless. Also any alternatives
for this tool could be helpful!

Thank you all in advance!

Cheers,

Alissa
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Re: [Qgis-user] how to enable "Attachment" widget

[Stefan Giese (WhereGroup)]

the field datatype should be string. if the datatype of your field 
something else, the the attachment widget will be disabled.

hope this helps
stefan

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Am 2019-08-05 15:26, schrieb karsten:

Hi All,

I am trying to add a photo attribute field in QGIS 3.4 with
"Attachment" widget in the attribute form dialogue field. But it is
always greyed out so could not select "Attachment" widget so far. How
can I accomplish this ?

Cheers

Karsten
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Re: [Qgis-user] Can't print large QGIS file

[Stefan Giese (WhereGroup)]

Hi,
you can try to print it into a PDf document with a virtual PDf printer 
instead of exporting from QGIS to PDF, for example with some of the free 
pdf tools like https://tools.pdf24.org/en/creator


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Am 2019-07-18 07:47, schrieb Genene Schumacher:

I am using QGIS 3.4.1   I have a map of the water & sewer assets for
the authorities region.

I have a list of about 20 maps created and showing in Layout Manager.
Most maps print but the one with lots of data (pipes) showing won't
export to pdf. QGIS crashes every time.

Any ideas how to get it into a pdf ?

Regards,

GENENE

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Re: [Qgis-user] Export data as .txt file

[Stefan Giese (WhereGroup)]

Hi Finbar,
Layer Panel, right Click->export->save layer as-> comma seperated values 
-> choose the geometry option you desire like WKT, xyz...


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Am 2019-07-11 11:31, schrieb GILLEN Finbar:

Hi,

Does anyone know how to export a dataset from QGIS as a .txt file?

Regards

Finbar

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Re: [Qgis-user] Geolocated tweets

[Stefan Giese (WhereGroup)]

There is a plugin called "Qweetgis" available for QGIS 3.x: 
https://github.com/ale-cristofori/Qweetgis. you will need to register 
yourself at https://developer.twitter.com and get valid Keys and tokens. 
The plugin is based on tweepy a python library to access the twitter 
API.


best regards
stefan

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Am 2019-05-01 22:18, schrieb Luigi Pirelli:

not yet ported to qgis3 there is this plugin
https://plugins.qgis.org/plugins/geotweet/
that basically usae tweepy (that you should install before to use the
plugin)

Luigi Pirelli

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On Wed, 1 May 2019 at 21:16, Piotr Kania  wrote:


Hello,
can You point me out, how non-programmer can use geolocated tweets
in qgis? Is it possible? Is there some plugin to get "naked" data
(csv?) from publicly available tweets?

I asked because of that:

https://twitter.com/usfs_nrs/status/1123251412329205762?s=19

https://twitter.com/trajcomp/status/1103991854666797057?s=19

The idea of getting some geolocated data from "society media" is
thrilling ;)

Greetings
Piotr Kania
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Re: [Qgis-user] Processing: QGIS Crash with new processing script format, QGIS 3.6.1-SOLVED

[Stefan Giese (WhereGroup)]

Hi Harvard,
that's on the point - it works perfect now. Just in time, that I can use 
it next monday in my PYQGIS workshop. I think, that is tons easier to 
understand then the whole bunch of functions which you had to define 
before. Thank's again for the link and the work done on the manual. I 
have attached the changed script with the two processing algorithms


best regards
stefan

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Am 2019-04-12 08:50, schrieb Havard Tveite:

Hi Stefan,

We have recently updated the user manual to reflect this new
great feature.
Can you test the example that is given there (also includes
two processing algorithms)?

https://docs.qgis.org/testing/en/docs/user_manual/processing/scripts.html#the-alg-decorator

Håvard

On 12.04.2019 08:28, Stefan Giese wrote:

Hi everybody,

I've just played with the new (3.6.1) processing script format (see 
https://github.com/qgis/QGIS-Enhancement-Proposals/issues/134 or 
https://anitagraser.com/2019/03/02/easy-processing-scripts-comeback-in-qgis-3-6/) 
and tried to put 2 processing algorithmen in it (centroid and buffer), 
but without success. The script stopped with the ":( QGIS crashed" - 
so anything goes wrong I suppose. May be someone can help me to get 
the right idea to connect various processing steps within the new 
format. my script is attached, it should take a polygon layer, make 
the centroids and then buffer the points.


best regards

stefan


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from qgis.processing import alg
import processing
 
@alg(name="centroids_and_buffer", label=alg.tr("Centroids and buffer"), group="examplescripts", group_label=alg.tr("Example Scripts"))
@alg.input(type=alg.SOURCE, name="INPUT", label="Input layer")
@alg.input(type=alg.VECTOR_LAYER_DEST, name='BUFFER_OUTPUT', label='Buffer output')
def centroids_and_buffer(instance, parameters, context, feedback, inputs):
"""
Description goes here. (Don't delete this! Removing this comment will cause errors.)
"""
source = instance.parameterAsVectorLayer(parameters, "INPUT", context)
if feedback.isCanceled():
return {}

centroids = processing.run("native:centroids", 
{'INPUT': parameters['INPUT'],
'ALL_PARTS': True, 
'OUTPUT': 'memory:'},
is_child_algorithm=True,
context=context,
feedback=feedback)

if feedback.isCanceled():
return {}   

alg_params = {'DISSOLVE': False,
'DISTANCE': 0.01,
'END_CAP_STYLE': 0,
'INPUT': centroids['OUTPUT'],
'JOIN_STYLE': 0,
'MITER_LIMIT': 2,
'SEGMENTS': 5,
'OUTPUT': parameters['BUFFER_OUTPUT']}

buffer = processing.run("native:buffer", alg_params,
is_child_algorithm=True,
context=context,
feedback=feedback)

if feedback.isCanceled():
return {}

return {'BUFFER_OUTPUT': buffer['OUTPUT']}___
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Re: [Qgis-user] Processing: QGIS Crash with new processing script format, QGIS 3.6.1

[Stefan Giese (WhereGroup)]

Hi Havard,
thanks a lot, yes I will test it and send you my feedback within the 
next days.


stefan

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Am 2019-04-12 08:50, schrieb Havard Tveite:

Hi Stefan,

We have recently updated the user manual to reflect this new
great feature.
Can you test the example that is given there (also includes
two processing algorithms)?

https://docs.qgis.org/testing/en/docs/user_manual/processing/scripts.html#the-alg-decorator

Håvard

On 12.04.2019 08:28, Stefan Giese wrote:

Hi everybody,

I've just played with the new (3.6.1) processing script format (see 
https://github.com/qgis/QGIS-Enhancement-Proposals/issues/134 or 
https://anitagraser.com/2019/03/02/easy-processing-scripts-comeback-in-qgis-3-6/) 
and tried to put 2 processing algorithmen in it (centroid and buffer), 
but without success. The script stopped with the ":( QGIS crashed" - 
so anything goes wrong I suppose. May be someone can help me to get 
the right idea to connect various processing steps within the new 
format. my script is attached, it should take a polygon layer, make 
the centroids and then buffer the points.


best regards

stefan


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Re: [Qgis-user] Q-Gis for Android V7

[Stefan Giese (WhereGroup)]

Hi Moritz,
you should check out qfield from opengis.ch 
(https://www.qfield.org/docs/de/ or 
https://play.google.com/store/apps/details?id=ch.opengis.qfield)


or

input from LutraConsult 
(https://play.google.com/store/apps/details?id=uk.co.lutraconsulting)


both work with QGIS projects and on Android >=7

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Am 2019-04-10 10:09, schrieb Moritz Kranz:

So im Working in a small town in Germany right now and we are planing
on taking  Android-based tablets to controll several spots in our town
with Quantum-Gis .
Unfortunatly the new Tablet we just bought has the Android Version
7.1.1 on it and as you might know, the Quantum Gis application in the
playstore is only for Android V5 or Android V6.

So my question now is, if your company plans on getting the Android
version of Quamtum Gis updated to Android V7 , and how long you think
it might take your Company to do so.
Or is it easier for us on trying to downgrade those tablets to an
earlier Android version.

If you have any questions you can message me on the e-mail adresse
"m.kr...@treuenbrietzen.de".
I am glad to hear from you and answer your questions.

Yours faithfully,

Moritz Kranz
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Re: [Qgis-user] union tool

[Stefan Giese (WhereGroup)]

You can use virtual layers (one possibility) with a union statement, 
something like:


SELECT geometry, field1, field2 FROM layer1
UNION SELECT geometry, field1, field2 FROM layer2
UNION SELECT geometry, field1, field2 FROM layer3
...

---
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Am 2019-04-05 05:45, schrieb Boaz Bar Ilan:

hi

is there a way to union many polygons which belongs to different
layers all at once?

thanks

boaz
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Re: [Qgis-user] how to add a jpg figure near points

[Stefan Giese (WhereGroup)]

see this image: 
https://drive.google.com/file/d/1SnYigYmyG8458qbtGanWg5-rrNsv9o_T/view?usp=sharing


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Am 2019-03-25 14:18, schrieb Azzurra Lentini:

Dear Lene Fischer thank you for your answer but I dont find it.
So from the layer panel shape file points (click right): properties
and style? but there I dont find "raster image maker"..

Azzurra

Lene Fischer  a écrit :

Under Symbology - you can choose raster image marker. I use it for  
aerial images next to points.

Regards


Lene Fischer
Associate Professor

University of Copenhagen
Department of Geoscience and Natural Resource Management Forest and  
Landscape College Nødebovej 77a

3480 Fredensborg
Denmark

-Oprindelig meddelelse-
Fra: Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] På vegne  af 
Azzurra Lentini

Sendt: 24. marts 2019 20:44
Til: qgis-user@lists.osgeo.org
Emne: [Qgis-user] how to add a jpg figure near points

Hi to all,
I would like to add in my project some figures near my points.
I explain better,I have a shapefile of points  that represent some
springs and I would like to associate for every point a figure (jpg
extension for example) that I did with another software (is a  a
diagram used in hydrogeochemistry to show the water composition): so I
would like to see near every point a figure (I think it would be the
same if I wanted to associate a picture).

Thanks to all

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Re: [Qgis-user] Aggregation of adjacent polygons of the same type

[Stefan Giese (WhereGroup)]

Hi Sven,
can you specify your question: what is unclear and where exactly do you 
need support for?


best regards
stefan
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Am 2019-03-25 10:04, schrieb Sven Böhme - empirica:

Hi!

I'm trying to aggregate neighboring polygons based on additional
conditions. These are:

- the polygons must be adjacent

- the polygons must be of the same type (simple value from attribute)

- the polygons should only be combined if the values of an attribute x
are below a certain value AND

- the polygons shall be merged with other polygons until this value is
reached

The polygons are grids. Aggregation should not necessarily lead to new
squares (as in the Quadtree-method).

I use PostGIS to store the data and QGIS for visualization and further
processing. For performance reasons I suspect that a
database-supported procession makes sense, but if QGIS (GDAL,GRASS
etc.) offers a function, I would like to try it out.

I would be happy about support

Best regards

Sven



empirica ag

Sven Böhme

Kaiserstraße 29

53113 Bonn
Fon +49 (0)228 91489-90

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Re: [Qgis-user] Python Scripts (Boolean) in QGIS 3

[Stefan Giese (WhereGroup)]

Hi Herbert,
with processing scripts ist has defintitly changed a lot. The thing is, 
that in QGIS 2.18 it was python but mixed with some none python, like 
the parameter with the double pound sign...like ##my_parameter=boolean


so a good starting point is the blog from Anita Graser, since the 
documetation on qgis.org isn't that actual at the moment: 
https://anitagraser.com/2018/03/25/processing-script-template-for-qgis3/


you can also start with the template directly in QGIS selecting "New 
script from template.." in the processing toolbox top, where the python 
icon is...


Hope this helps a bit
Stefan

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Am 2019-03-12 13:48, schrieb Herbert Lincon:

Hello everyone,

 I have a script in QGIS 2.18 to receive the information from 4
boolean options as simple as that

 ##formula_1=boolean

##formula_2=boolean

##formula_3=boolean

##formula_4=boolean

##result=output string

if formula_1 == True:

result= 1

elif formula_2 == True:

result= 2

elif formula_3 == True:

result= 3

elif formula_4 == True:

result= 4

else:
 result= 5

 the problem is, this type of script doesn´t work in QGIS 3, and I´m
a newbie in Python,
 could someone translate that to the new method?

 it´ll help me even begin to understand python 3

 Thanks
 Herbert Lincon
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Re: [Qgis-user] geodin installation

[Stefan Giese (WhereGroup)]

I suppose that you have installed the Plugin GeODinQGIS, which will 
search for a GeoDin database when you start QGIS 2.x. Uninstall the 
plugin: Menu->Plugins->Manage and install Plugins...search for Geodin 
and deselect it


---
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Am 2019-01-24 21:17, schrieb Boaz Bar Ilan:

whenever im trying to open qgis appear error message that geodin
installation was not found
what to do ?
thanks
boaz
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Re: [Qgis-user] Using expression dialog to access attributes from a relation.

[Stefan Giese (WhereGroup)]

Hi Andrew,
you can use the relation_aggregate expression to concatenate the child 
items, something like:
relation_aggregate('my_relation','concatenate', "child_attribute", 
concatenator:=',')

just see the help for relation_aggregate in the expression builder.

bests regards
Stefan

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Am 2018-12-13 17:11, schrieb Andrew Bell:

I have spatial layer and non-spatial layer set up as a relation QGIS
3.4.  The non-spatial layer is the child.

I'm trying create a display pop-up for the spatial layer that sources
attributes and values from the relation layer.

I can see the relation is an option in the expression dialog but at
the moment I cannot see how I'm going to bring through field names and
values from this other table.

Has anyone done this and have any pointers they could share?

Many thanks

Andrew
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Re: [Qgis-user] looking for mapping program

[Stefan Giese (WhereGroup)]

Hi Diane,
some thoughts to your question: QGIS would be a very good choice (or the 
best!) and will be a substainable GIS for your company. You are writing 
that there is only a txt export option? A quick view on the user guide 
(http://static.garmin.com/pumac/XMap7Manual.pdf) shows, that xmap works 
(can work) with databases and has a bulk export option, at least it can 
export kml. So first, the migration process will depend on how your data 
infrastrucure is organized. In general a migration process from one GIS 
into an other can be a lot of work. as many GIS systems xmap distinguish 
between projects (how your data is organized and displayed in the map) 
and the spatial data itself. I suppose the export of the projects will 
not be possible, whereas the data should not be that problem. May be it 
will be worth to use the help from a GIS professional to manage the 
migration process. This depends on your workflows and as described 
before from the infrastructure of your data.


best regards
stefan

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Am 2018-08-29 17:33, schrieb Diane Green:

We currently use XMap 7 pro and are looking for a replacement package.
 I need some feedback to see if QGIS is a good replacement.  We also
need in the new package the ability to import the old projects from
XMap 7 pro which does not have an export option except txt format.  We
are a forestry based company.

Any comments are welcome.

Diane Green
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Re: [Qgis-user] Working with irregular magnetometry data points - converting them to an image

[Stefan Giese (WhereGroup)]

Hi Calvin,
I am working with magnetometry data for archaeology purposes since over 
20 years(http://en.ggh-online.de/geophysik): starting with geoscan FM36, 
then geometrics G858 with four caesium probes and FEREX from Foerster. 
usually we are processing the raw data with gis software: first started 
with ArcView 3, then ArcGis and since a couple of years we switched to 
QGIS3 which is a good choice to do it with. I have wrote a bunch of 
python scripts to
 * bring the raw data exported from the different magnetometers into a 
gis format (mainly shape)
 * then make some correction within the shapefile due to walking 
zick-zack-mode
 * interpolate a regular grid from the measured values (the are more or 
less spaced 0,1 x 0,5 meters). for that I use IDW (inverse distance 
weighted) with the following parameters: cell size 0.25 and search 
radius 0.5 and power 1). The results are good (see attached image with a 
roman fort). Just take the inbuild processing tools like SAGA inverse 
distance interpolation.
  * the last processing step is to make a line correction (heading 
effect) where I use a line media filter. That is a bit tricky, the best 
is to export your grid to numpy and use numpys power to do it.


Which magnetometer do you use to measure the data? If you send me a data 
file I can have a look at it. I have attached an example which is 
processed with qgis.


Best regards
stefan

Mit freundlichen Grüßen
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Am 2018-04-20 20:13, schrieb C Hamilton:

Thanks Ben,

I will give that a try. I am finding that the Interpolation algorithm
is taking forever on a small data set.

Doesn't the Postgres PDAL extension handle point data like this? Would
there be a benefit of putting the data in PostGIS?

Thanks,

Calvin

On Fri, Apr 20, 2018 at 1:10 PM, Benjamin Ducke 
wrote:


Hi Calvin,

On 20/04/18 18:46, Richard McDonnell wrote:

Calvin,

Under Processing Toolbox, Type interpolation into the search bar,

the

tool you want can be found there.


None of the typical GIS interpolation tools will be
of much help here, since they have all been optimized
to work with relatively sparse data. They will be
too inefficient for high-resolution geomagnetic data.

You data is already dense, with some gaps. So you need
something that is fast and efficient for small
interpolation radii, and will not produce too many
artefacts.

If you can use the GRASS7 plug-in from within QGIS,
than this is a good processing path:

1. Rasterize your data points, using a cell size
small enough so that you don't have too much information
loss (i.e. not too many occurrences of more than one data
point per cell). This might take a little trial and error
to find good settings. You should end up with a raster
where you have gaps of max. 1-3 empty cells between cells
with measurement data.

Now you need to fill these relatively small gaps.

2. Use r.fill.stats from current GRASS 7.4:

https://grass.osgeo.org/grass74/manuals/r.fill.stats.html [1]

... because that has been designed exactly for the
purpose. Set the interpolation radius as small as
possible, so that it just manages to fill the gaps.
With a small radius, r.fill.stats is very fast and
memory efficient, even on very large raster datasets.

Note that r.fill.stats is part of GRASS 7 only since
version 7.4. If your QGIS ships with an earlier
version, then you might have to update your GRASS 7
binaries manually.

Best,

Ben


Regards,

Richard.

On 20/04/2018 16:42, C Hamilton wrote:

I don't know how many of you have worked with archaeological
magnetormetry data, but I have been asked to help with

magnetometry

data of the ancient Mound Builders in North America. I am looking

for

some suggestion on how to best turn the irregular magnetic data

points

into an image.

I see an Interpolation plugin that perhaps is the solution, but I

also

see that it is not part of QGIS 3. Is this because it has not

been

ported yet, or is not going to be porter, or is there a better

solution?


I don't know if any of the Lidar tools would work for this or

not.

LASTools is a commercial product and the locked version only

works

with small data sets and adds noise unless you purchase a

license. At

least that is how it was the last time I used it.

Thanks for any suggestions.

Calvin


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Re: [Qgis-user] automatic recognition intersection

[Stefan Giese (WhereGroup)]

Hi Marcel,
may be this thread helps: 
https://stackoverflow.com/questions/12965090/get-list-of-all-intersections-in-a-city. 
The second answer with the overpass api will do the intersect for you. 
you can export it and load it into QGIS. But anyway, I thinks with a 
little bit of work, you can do it in QGIS too...


best regards
stefan

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Am 2018-04-04 16:07, schrieb Marcel Sieg:

Dear community,

is it possible to automatically recognize intersection in QGIS? So
lets say I just have a city map from openstreetmap with all the
streets, places and so on. What I am wanting to do is instead of set a
point on every intersection (which would take me weeks in a big city)
within a city I say to Qgis okay put on every intersection one dot
with the name of the streets. I am wondering if GIS can filter that
out from a regular openstreetmap file.

Mit freundlichen Grüßen

Marcel Sieg
Studentischer Mitarbeiter Bereitstellung Fahrradvermietung (P.PVB 3)

Deutsche Bahn Connect GmbH
Torgauer Straße 12-15, 10829 Berlin
Tel. n.b.
_
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Re: [Qgis-user] Using processing algorithms from the console in QGIS 3.0

[Stefan Giese (WhereGroup)]

Hi Stephen,
I asked a similar question at gis.stackexchange.com 
(https://gis.stackexchange.com/questions/274144/passing-input-output-parameters-to-processing-scripts-using-qgis-3) 
and I think we have to be patient. The documentation is work in 
progress. I am sure processing tools will work like a charm, when we 
will know how to use it;-)


Best
stefan

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Am 2018-03-21 17:46, schrieb Stephen Bosch:

Hello,

I am running QGIS 3.0.0 in Linux.

I'm trying to migrate some pyqgis code from 2.14 to 3.0 and
discovering the hard way that just about everything has changed :)

(Unfortunately, the docs haven't been updated yet and the API docs are
pretty sparse.)

Say I have this command, which worked in 2.x:

file_grid_r = processing.runalg("grass7:v.to.rast.value", grid_v, 0,
1, extent, 0.008333, -1, 0.000100, None)['output']

processing.runalg() doesn't exist anymore, apparently it was replaced
with processing.run(). However, this:

file_grid_r = processing.run("grass7:v.to.rast.value", grid_v, 0, 1,
extent, 0.008333, -1, 0.000100, None)['output']

does not work as expected. In the PyCharm debugger, I receive this
error message:

sys:1: ResourceWarning: unclosed 

(If the command syntax is in fact correct, then perhaps the algorithm
is not accessible?)

My questions:

* Is there up-to-date console documentation for the Processing
toolbox somewhere?
* How can I get a listing of the available algorithms in the same
format as in 2.x?
* How do I convert the algorithm calls (processing.runalg) from 2.x
to 3.x?

Thanks

Stephen
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Re: [Qgis-user] Drill hole section with QGIS 3

[Stefan Giese (WhereGroup)]

The gis representation of a drill hole is normaly a point with some 
stratigraphic or lithological information of the underground behind it 
(a 1:n relation, 1 drill = n strata). In qgis2 there was the midvatten 
plugin which does such drill hole sections (see attached image).


hope this makes the drill hole thing a bit more clear...;-)

best regards
stefan
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Am 2018-03-15 13:31, schrieb C Hamilton:

Pardon my ignorance on the matter, but what does a drill hole
capability mean? Is it simply making a hole in a polygon or is it much
more complex.

Thanks,

Calvin

On Wed, Mar 14, 2018 at 3:46 PM, John Harrop 
wrote:


It looks like no one has been answering this for you yet and I’m
just catching up on a few days emails after my computer was in the
shop.

There is active interest in developing a drill hole plugin for QGIS3
now that 3D is more fully supported.  I also work with drill holes
and have been running them in QGIS fairly easily in plan view where
I just calculate traces to a plan view (either in a spreadsheet or
using code) and apply theme patterns based on the attributes I kept
with the segments.  This has worked reasonable well with grade and
lithology which are two of the main things you want to see.

Cross sections have been harder, but those are still “maps” in
non-Earth coordinates.  Again I’ve tended to build those with
projections to a plane in either a spreadsheet or by code.  This is
not as easy to work with as plan view so I am very interested in
seeing the developing interest in getting a drill hole section
plugin for QGIS.  That will really finalize QGIS as the logical
choice for geological exploration work.

I’ve cc’ed the others I know using QGIS so I hope you can be
included in the list of interested users.

Regards,

John Harrop, PGeo, FGS
Senior Project Geologist
Coast Mountain Geological Ltd

PO Box 62
Suite 488 - 625 Howe St
Vancouver, BC   V6C 2T6

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Re: [Qgis-user] QGIS custom python function with zero or more args

[Stefan Giese (WhereGroup)]

Hi Benjamin,
you can do it like this example which only makes a sum of 2 values. Two 
aruments or only one...:

--
@qgsfunction(-1, 'Python')
def add_values( values, feature, parent):
if len(values) == 2:
return values[0]+values[1]
elif len(values) == 1:
return values[0]+5

@qgsfunction(-1, 'Python') says that you will pass a list of arguments 
and the function will be in the Python rider.
In the code, you can check the number of arguments with getting the 
length of the list, and then use your default values...


hope this helps
stefan


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Am 2018-03-09 09:18, schrieb fuenfer-koenigstein.benjam...@swm.de:

Hi all,

I would like to write a custom python function for QGIS 2.18 that
takes zero or one argument. The reason is that in most cases I can use
a default value in the function, in some cases I would like to enter
the value as argument. For python I know that you can prefix args in
functions to make them optional, e.g. def func(*arg). For QGIS
functions this will not work because there always have to be the args
feature and parent in last two positions. Has anyone experience with
QGIS functions that take zero or more arguments? Thanks for any help!

Regards
Benjamin
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Re: [Qgis-user] Qgis 3 where is 3D View?

[Stefan Giese (WhereGroup)]

Hi Alessio,
the Ubuntu QGIS3 is not compiled with 3D support due to an outdated Qt 
version (Ubuntu 16.04 comes with Qt version 5.5). I think you have to 
build QGIS by yourself and update the Qt version before. From Lutra 
Consulting there is a brief description how to do that: 
https://www.lutraconsulting.co.uk/blog/2017/08/06/qgis3d-build/


hope this helps
Stefan

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Am 2018-03-07 20:52, schrieb Alessio Degioannini:

Hello to all,

I can't find 3D view in Layer Style of Qgis 3  on Ubuntu 16.04 (see
attached image).

Someone can help me?

Thanks in advance.

Alessio



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Re: [Qgis-user] QGIS3: browse to path by text

[Stefan Giese (WhereGroup)]

Hi Tobias,
see attached image.

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Am 2018-01-19 19:30, schrieb Tobias Wendorff:

Hi there!

QGIS3's browser doesn't seem to have a simple input, where to
directly enter a path like "Z:\geodata\subdir\anywhere\else\"
in text, does it?

I tried fast scanning "Z:\" and using the filter on it - without
success.

Am I doing something wrong, is there a workaround or was it simply
not implemented?

Best regards,
Tobias

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Re: [Qgis-user] Shape file to xyz where z is label

[Stefan Giese (WhereGroup)]

Hi Chas,
you can use Vector-Menu->Geometry Tools->Polygon centroids
which will produce a pointlayer with all attributes. There you will find 
your label as one column like in the geology layer.


best
stefan

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Am 2018-01-19 06:07, schrieb Chas Sheen:

I have a shape file of geology where the label represents lithology.
Is there a way to export xyz where z is the label.
Then I could display result in other software.
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Re: [Qgis-user] Calculate age in years with expressionbuilder

[Stefan Giese (WhereGroup)]

Hi Reginald,
you should use Year(todate(now()) without the underscore in 
to_date...but don't ask me why...


best
stefan

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Am 2017-12-19 09:14, schrieb Reginald Carlier:

Thanks Stefan,

I finally got the age by using this code:

(2017 - year(to_date("GDate")))

Year(to_date(now()) seems to fail as there are missing brackets but I
can't figure out where.

Regards,

Reginald Carlier

Deskundige GIS

 [1]

Gemeente Ingelmunster
,
Oostrozebekestraat 4
,
8770

Ingelmunster

T
+32 51 33 74 39 [2]

WWW.INGELMUNSTER.BE [1]

 [3]
 [4]
 [5]
 [6]

RAADPLEEG ONZE DISCLAIMER  [7]

 -Oorspronkelijk bericht-
Van: Stefan Giese (WhereGroup) [mailto:stefan.gi...@wheregroup.com]
Verzonden: dinsdag 19 december 2017 8:58
Aan: Reginald Carlier
CC: qgis-user@lists.osgeo.org
Onderwerp: Re: [Qgis-user] Calculate age in years with
expressionbuilder

I forgot: and as a workaround you can use:
year(todate(now()) - year(todate("GDate")) which will produce correct
ages, or you can use your own python function (expression
builder->functions->new file):

from qgis.core import *
from qgis.gui import *

from datetime import datetime
from dateutil.relativedelta import relativedelta

@qgsfunction(args=2, group='Python')
def GetAge(values,feature,parent):
'''
call this function GetAge("fromdate","todate")
in years
'''
d1 =datetime.strptime(values[0],"%Y-%m-%d")
d2 =datetime.strptime(values[1],"%Y-%m-%d")
difference = relativedelta(d2, d1)
return difference

Am 2017-12-19 07:48, schrieb Stefan Giese (WhereGroup):

it seems, that this is a bug, see:
https://issues.qgis.org/issues/17681

best regards
Stefan


Am 2017-12-18 15:26, schrieb Reginald:

hello,

I am calculating the age of persons with the expression builder.
My formulae looks like this:
year(age( to_date(now()) , "GDate" )) The result looks alright for
people who are younger than 68 years.
People who are born in 1949 or before get negative ages and the age



goes from -68 to -31 (for someone born in 1913) What is wrong with

my

formulae?

Regards,






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Re: [Qgis-user] Calculate age in years with expressionbuilder

[Stefan Giese (WhereGroup)]

I forgot: and as a workaround you can use:
year(todate(now()) - year(todate("GDate"))
which will produce correct ages, or you can use your own python function 
(expression builder->functions->new file):


from qgis.core import *
from qgis.gui import *

from datetime import datetime
from dateutil.relativedelta import relativedelta

@qgsfunction(args=2, group='Python')
def GetAge(values,feature,parent):
'''
call this function GetAge("fromdate","todate")
in years
'''
d1 =datetime.strptime(values[0],"%Y-%m-%d")
d2 =datetime.strptime(values[1],"%Y-%m-%d")
    difference = relativedelta(d2, d1)
return difference


Am 2017-12-19 07:48, schrieb Stefan Giese (WhereGroup):

it seems, that this is a bug, see: https://issues.qgis.org/issues/17681

best regards
Stefan


Am 2017-12-18 15:26, schrieb Reginald:

hello,

I am calculating the age of persons with the expression builder.
My formulae looks like this:
year(age( to_date(now()) , "GDate" ))
The result looks alright for people who are younger than 68 years.
People who are born in 1949 or before get negative ages and the age 
goes

from -68 to -31 (for someone born in 1913)
What is wrong with my formulae?

Regards,






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Re: [Qgis-user] Calculate age in years with expressionbuilder

[Stefan Giese (WhereGroup)]

it seems, that this is a bug, see: https://issues.qgis.org/issues/17681

best regards
Stefan


Am 2017-12-18 15:26, schrieb Reginald:

hello,

I am calculating the age of persons with the expression builder.
My formulae looks like this:
year(age( to_date(now()) , "GDate" ))
The result looks alright for people who are younger than 68 years.
People who are born in 1949 or before get negative ages and the age 
goes

from -68 to -31 (for someone born in 1913)
What is wrong with my formulae?

Regards,






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Re: [Qgis-user] Clipping a Raster

[Stefan Giese (WhereGroup)]

You can use "Clip raster by extent" or "Clip raster by mask layer" from 
the proccessing toolbox


regards
stefan

Am 2017-12-13 17:09, schrieb Mark Polczynski:

Sorry for the simple question, but how do you clip a raster in 2.18? I
believe I used to use something like  Raster>Extraction>Clipper in
2.14, but I don't see that sequence on 2.18.  Here is what I see...

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Mark Polczynski
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