[Qgis-user] Where to install sklearn on Linux?

[Drew French via QGIS-User]

Hello there,
I learned how to do this last year but forgot - I would like to use the
SmartMap plugin for geostatistics, and I need to install the scikit-learn
python library on my Linux machine. I remember I solved this by installing
QGIS in a conda environment, but I would like to sidestep all that and
simply install sklearn in a QGIS folder and get back to work. Thanks for
any thoughts.

QGIS version

3.34.1-Prizren

QGIS code revision

133927424d9 

Qt version

5.15.3

Python version

3.10.12
on
Linux Mint 21 Cinnamon 5.4.12

Thanks!

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Re: [Qgis-user] Raster reverts to old Min/Max

[Drew French via QGIS-User]

Thanks Richard, I will check that out. On a relatively unrelated note, on a
raster, if I go to Symbology window, click on Transparency, and accidently
leave the Transparency Band option on Band 1, the raster will appear half
transparent regardless of what you do in the Symbology tab. I was flummoxed
for a while until I found that out.

On Tue, May 28, 2024 at 9:45 AM Richard McDonnell 
wrote:

> Hi Andrew,
>
> One probable solution is to save the new style as the default, for the
> Layer.
>
> Kind Regards,
>
>
>
> Richard
>
>
>
> ——
> Richard McDonnell MSc GIS, FME Certified Professional
> *Flood Risk Management - Data Management*
>
> ——
> Oifig na nOibreacha Poiblí
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>
> Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
> Jonathan Swift Street, Trim, Co Meath, C15 NX36
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>
> ——
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>
> *From:* QGIS-User  *On Behalf Of *Drew
> French via QGIS-User
> *Sent:* 28 May 2024 15:27
> *To:* QGIS List 
> *Subject:* [Qgis-user] Raster reverts to old Min/Max
>
>
>
> Hi all,
>
> I have two DEMs, one is the whole USA, the other is a watershed. They
> obviously have two different raster Min/Max levels, based on elevation.
> When I adjust the watershed DEM to my liking, I then right click, copy the
> style, and right click the USA DEM to paste the style. So far, so good, I
> did this a thousand times in the past without a problem. Now, though, when
> I adjust anything in the USA DEM, it reverts right back to the old Min/Max.
> Anybody else have this issue and what do you think is going on?
>
> Using 3.34.1 Prizren
>
>
> --
>
> Andrew French
>
> (715) 986-8088
>


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[Qgis-user] Raster reverts to old Min/Max

[Drew French via QGIS-User]

Hi all,
I have two DEMs, one is the whole USA, the other is a watershed. They
obviously have two different raster Min/Max levels, based on elevation.
When I adjust the watershed DEM to my liking, I then right click, copy the
style, and right click the USA DEM to paste the style. So far, so good, I
did this a thousand times in the past without a problem. Now, though, when
I adjust anything in the USA DEM, it reverts right back to the old Min/Max.
Anybody else have this issue and what do you think is going on?
Using 3.34.1 Prizren

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Re: [Qgis-user] 3.20.1 fails on Linux Mint

[Drew French]

Same here, same fix. Thanks!

On Thu, Jul 22, 2021 at 1:32 PM  wrote:

> Hi,
>
> same problem here on Fedora 34 (no GUI, no error, qgis process at 100% on
> one core), same fix.
>
> Thanks!
> Jochen
>
> Am 21.07.21 um 22:29 schrieb Richard Greenwood:
>
> Same here -
> removing ~/.local/share/QGIS/QGIS3/profiles/default/symbology-style.db
> fixes the issue.
>
> Many thanks!
> Rich
>
> On Wed, Jul 21, 2021 at 11:47 AM Fernando M. Roxo da Motta 
> wrote:
>
>> On Wed, 21 Jul 2021 13:05:14 -0400, Randal Hale
>>  wrote:
>>
>>
>> > Removing the
>> > ~/.local/share/QGIS/QGIS3/profiles/default/symbology-style.db worked
>> > for me - it was recreated upon startup.
>>
>>   Just tried and it worked.
>>
>>   Sdls.
>>
>> >
>> > Randy
>> >
>> >
>> > On 7/21/21 12:56 PM, Andrea Giudiceandrea wrote:
>> > > Il 21/07/2021 18:42, Andrea Giudiceandrea ha scritto:
>> > >
>> > >> See https://github.com/qgis/QGIS/issues/44299 for some
>> > >> workarounds: it seems the isse is related to the
>> > >> "symbology-style.db" file in the profile folder.
>> > >
>> > > The correct link to the Issue on GitHub is
>> > > https://github.com/qgis/QGIS/issues/44293.
>> > >
>> > > Regards.
>> > >
>> > > Andrea
>> > > ___
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>> > > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>> >
>>
>>
>>
>>
>>
>>
>>
>>
>>   Roxo
>>
>> --
>>  Non luctari, ludare ---+ WYSIWYG
>> Fernando M. Roxo da Motta   | Editor?
>> Except where explicitly stated I speak on my own behalf.|  VI !!
>> PU5RXO | PX5Q6048   | I see text,
>>  Quis custodiet ipsos custodes?-+ I get text!
>>
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>
>
> --
> Richard W. Greenwood, PLS
> www.greenwoodmap.com
>
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Drew French
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Re: [Qgis-user] Clip Tool query

[Drew French]

I  think clipping as a batch process is one step.

On Sat, Jul 17, 2021 at 5:33 AM shrawan tripathi <
shrawantripathi1...@gmail.com> wrote:

> Dear All,
> I have one query that I have a contour file for a whole District and have
> a village boundary of all the villages within the district. So I want to
> create a contour file separately  for all villages from a single process .
> So could anyone give me an idea about what tool I should use other than
> Clipping in the batch process?
>
> --
> Warm regards
> Shrawan Kumar Tripathi
> GIS Consultant
>
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Re: [Qgis-user] Rasters in print layout are not aligned 3.20

[Drew French]

Will do.

On Thu, Jul 15, 2021 at 12:12 AM Nyall Dawson 
wrote:

> On Fri, 9 Jul 2021 at 08:24, Drew French  wrote:
> >
> > Thanks, I gave that I try, but it didn't work for me. It is possible I
> missed a mask, I'm working on a complicated project. I will try a simpler
> project and see if it works.
>
> If you can't track it down can you please open a bug report with a
> sample project which demonstrates this?
>
> Nyall
>
> >
> > On Thu, Jul 8, 2021, 5:05 PM Tony Shepherd (FarmMaps NZ) <
> t...@farmmaps.nz> wrote:
> >>
> >> Hi
> >>
> >>
> >>
> >> See my post from Wed 7th July.
> >>
> >>
> >>
> >> I have exactly the same problem since loading 3.20.  By chance do you
> have label masking enabled on any layers?  I discovered that if I disable
> the layer masking, then the rasters and vector data will then align
> correctly.  Re apply masking and then the error pops up again.
> >>
> >>
> >>
> >> It’s a bit of a pain as I have a template that I start new jobs with
> that has label masking enabled on several layers, so I have resorted to
> using 3.18 again, but 3.20 does have some cool features.
> >>
> >>
> >>
> >> Cheers
> >>
> >> Tony
> >>
> >>
> >>
> >> Tony Shepherd  |  GeoSpatial / Mapping Manager
> >>
> >> Ph 027 435 6193  |  E t...@farmmaps.nz
> >>
> >> FarmMaps NZ, 3 Kerwood Place, Gore 9740
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> From: Qgis-user  On Behalf Of Drew
> French
> >> Sent: Friday, 9 July 2021 6:10 am
> >> To: QGIS List 
> >> Subject: [Qgis-user] Rasters in print layout are not aligned 3.20
> >>
> >>
> >>
> >> I have noticed that all my rasters, as well as WMS layers, are not
> aligned in print layout. This tells me that there is a setting somewhere
> that is wrong. I am using 3.20 on Linux Mint. All the layers CRS are the
> same. If I could get help with this I would really appreciate it!
> >>
> >>
> >> --
> >>
> >> Drew French
> >>
> >> (715) 986-8088
> >>
> >> www.ecologicaldesign.land
> >
> > ___
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> > Qgis-user@lists.osgeo.org
> > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
> > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
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[Qgis-user] Print Layout Vertical Aligment

[Drew French]

Has anybody else noticed that in some text boxes in print layout the
vertical alignment is completely off? Center will go to top, top will go to
bottom and bottom will disappear for me occasionally, seemingly at random.
Sometimes it is random. Any thoughts?

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

[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] Rasters in print layout are not aligned 3.20

[Drew French]

Thanks, I gave that I try, but it didn't work for me. It is possible I
missed a mask, I'm working on a complicated project. I will try a simpler
project and see if it works.

On Thu, Jul 8, 2021, 5:05 PM Tony Shepherd (FarmMaps NZ) 
wrote:

> Hi
>
>
>
> See my post from Wed 7th July.
>
>
>
> I have exactly the same problem since loading 3.20.  By chance do you have
> label masking enabled on any layers?  I discovered that if I disable the
> layer masking, then the rasters and vector data will then align correctly.
> Re apply masking and then the error pops up again.
>
>
>
> It’s a bit of a pain as I have a template that I start new jobs with that
> has label masking enabled on several layers, so I have resorted to using
> 3.18 again, but 3.20 does have some cool features.
>
>
>
> Cheers
>
> Tony
>
>
>
> *Tony Shepherd*  *|*  GeoSpatial / Mapping Manager
>
> Ph 027 435 6193  *|*  E t...@farmmaps.nz
>
> FarmMaps NZ, 3 Kerwood Place, Gore 9740
>
>
>
> [image: FM_logo1_small (Custom)]
>
>
>
>
>
> <http://tonyshepherd8.wixsite.com/home>
> <https://www.wunderground.com/personal-weather-station/dashboard?ID=ISTLGORE2>
>
>
>
>
>
>
>
>
>
> *From:* Qgis-user  *On Behalf Of *Drew
> French
> *Sent:* Friday, 9 July 2021 6:10 am
> *To:* QGIS List 
> *Subject:* [Qgis-user] Rasters in print layout are not aligned 3.20
>
>
>
> I have noticed that all my rasters, as well as WMS layers, are not aligned
> in print layout. This tells me that there is a setting somewhere that is
> wrong. I am using 3.20 on Linux Mint. All the layers CRS are the same. If I
> could get help with this I would really appreciate it!
>
>
> --
>
> Drew French
>
> (715) 986-8088
>
> www.ecologicaldesign.land
>
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Re: [Qgis-user] Rasters in print layout are not aligned 3.20

[Drew French]

Yes they are the same CRS. The weird thing is everything is aligned
correctly in the map canvas, basemaps are where they should be etc...I
switched over to 3.16 and everything works fine there in print layout, but
then when I switch back to 3.20 the problem is still in print layout, using
the same files of course. Anither quirk is if I zoom in, my vector layers
will be correct, but the raster layers change size, ie resolution.

On Thu, Jul 8, 2021, 4:14 PM Alexandre Neto  wrote:

> Hi Drew,
>
> Check the project CRS and the map item CRS.
>
> Are those layers not aligned also in the main map canvas?
>
> Alexandre Neto
>
> A quinta, 8/07/2021, 19:10, Drew French  escreveu:
>
>> I have noticed that all my rasters, as well as WMS layers, are not
>> aligned in print layout. This tells me that there is a setting somewhere
>> that is wrong. I am using 3.20 on Linux Mint. All the layers CRS are the
>> same. If I could get help with this I would really appreciate it!
>>
>> --
>> Drew French
>> (715) 986-8088
>> www.ecologicaldesign.land
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>
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[Qgis-user] Rasters in print layout are not aligned 3.20

[Drew French]

I have noticed that all my rasters, as well as WMS layers, are not aligned
in print layout. This tells me that there is a setting somewhere that is
wrong. I am using 3.20 on Linux Mint. All the layers CRS are the same. If I
could get help with this I would really appreciate it!

-- 
Drew French
(715) 986-8088
www.ecologicaldesign.land
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Re: [Qgis-user] Missing plugins in version 3.20

[Drew French]

Using 3.20 on Linux Mint, no problems with any plugins or anything as of
now. I actually migrated over from Windows as well in the last month and
I've had to upload all my projects from disc- Worked remarkably well,
luckily I had them saved as relative paths.I had to change some file
locations as I had new file structure, but even print templates worked
well, except for some reason made many fonts bold. No plugin issues, but
then again I was starting from scratch and just downloaded the essential
plugins as needed.

On Wed, Jul 7, 2021 at 3:35 AM Pat Brown  wrote:

> Thank you. 3.18 still seems to be working perfectly (for my requirements
> anyway) so will just have to stick with that until I can upgrade my pc.
>
> On Wed, Jul 7, 2021, 09:57 Jürgen E. Fischer  wrote:
>
>> Hi Pat,
>>
>> > On Wed, 07 Jul 2021, 00:27 Pat Brown,  wrote:
>> > > I have always used the standalone installer. I see that there is a
>> note
>> > > saying that WIN 7 no longer works but as this is mentioned under the
>> > > OSGeo4W installer I thought it only applied to that. Am I wrong in
>> this
>> > > assumption? I am still using WIN 7 and all version 3.x have worked
>> fine so
>> > > far. Do think that WIN 7 could be my problem?
>>
>> The "Standalone installers (MSI) [are made] from OSGeo4W packages".  So it
>> applies to both.  Both have Python 3.9 and that gave up on Windows 7.
>>
>> The LTR however is also available from the old repo and that still works
>> on
>> Windows 7.
>>
>>
>> Jürgen
>>
>> --
>> Jürgen E. Fischer   norBIT GmbH Tel.
>> +49-4931-918175-31
>> Dipl.-Inf. (FH) Rheinstraße 13  Fax.
>> +49-4931-918175-50
>> Software Engineer   D-26506 Norden
>> https://www.norbit.de
>> QGIS release manager (PSC)  Germany IRC: jef on
>> Libera|OFTC
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Re: [Qgis-user] PDAL to the rescue

[Drew French]

Thanks Luigi - I am a beginner with json pipelines and python scripts, as
well as PDAL, but am learning how useful this workflow is. When you switch
from clicking buttons to understanding the code you get a much better grasp
of what is happening behind the scenes, as well as your actual work needs.

I did create a json pipeline and used PDAL command "pipeline" in the
terminal. I know I should be using Conda but I still haven't understood the
need for Conda quite yet, if anybody can explain that a little more. Is it
okay to simply use the terminal or should I be using Conda?

I am also trying to learn Julia in order to use Circuitscape and that is a
whole nother ball of wax. There really are no beginner tutorials on a lot
of these more specialized applications  one is expected to understand quite
a bit of code before even attempting to use some of them.

Thanks,

Andrew
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[Qgis-user] PDAL to the rescue

[Drew French]

I just wanted to share a quick story with you - I recently switched over to
Linux from Windows and it has been interesting - overall very positive but
a definite learning curve going on here. I was just beginning to work with
LIDAR data and I realized I hadn't set up LASTools and Fusion in QGIS 3.20
and I quickly learned this was not going to be an easy endeavor on a Linux
machine. As I use point clouds fairly often this was alarming. But then I
remembered that 3.20 has LIDAR support built in, and I quickly opened up a
las file and found it to be easy and intuitive to use if you know the QGIS
GUI. Styling and so on is a breeze, and I huge thank you from me to the
developers as I am sure this was a large amount of work to bring to
fruition.

But then I realized that I didn't have any of my old tools to create DEMs
and that was one of the most important things I do on a weekly basis with
point cloud data. I began to look into PDAL and was able to simply create a
quick DEM using PDAL in my terminal following a tutorial online. That was
actually easier and simpler than my other workflow, so now I will be
learning more about PDAL as I go forward.

Just wanted to note that it seems that if you are willing to learn how to
use PDAL, then it seems to me that LASTools and Fusion are kind of obsolete
with this new version of QGIS. Let me know if that seems accurate.

Thanks again to all the developers of QGIS,

Andrew French
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Re: [Qgis-user] QGIS - Vector layer with multiple entities

[Drew French]

If you just run Intersection with FIELD as input and TOWN as overlay you
will get the data you need. You could join the TOWN and results layer using
a key. Is there a reason you need to use an expression?

On Thu, Jun 24, 2021 at 9:43 AM Edouard Bourgine 
wrote:

> Hi,
>
>
>
> I’m running qgis 3.16 on w10.
>
>
>
> I have two vector layers with multiple entities :
>
> · One with each town borders (? I’m note sure if this is the
> right word) I mean the area for each zip code. (TOWN_LAYER) (polygon vector)
>
> · The second with cropfields and meadows (polygon vector)
> (FIELD_LAYER)
>
>
>
> I want the total area of cropfield and Meadows in each Town from the first
> layer. (Exemple : one town have 31 fields/meadows -> total town area is
> 55km² (i have that info) and cropfield/meadows area is 26km² (i need that
> one for each town)
>
>
>
> First i tried something like :
>
> · 
> Sum(area(intersection($geometry,geometry(‘FIELD_LAYER_ID’))),group_by :=FIELD
> WITH SAME VALUE EVERYWHERE)
>
>
>
> But it is not a valid expression (geometry(‘FIELD_LAYER_ID’) don’t work)
>
>
>
> Some meadows span over several town. Some juste inside one.
>
> I’ve « cut » the FIELD_LAYER with the TOWN_LAYER
>
>
>
> My first vector layer as a field specific and i’m looking for the formula
> that would give me the right answer.
>
>
>
> I’ve tried :
>
>
>
> · aggregate (layer :=’FIELD_LAYER_ID’,
> aggregate :=’sum’,expression :=$area, filter := intersects($geometry,
> geometry(@parent)))
>
>
>
> It doesn’t work because the borders are overlapping : each fields just
> touching the borders even if they belong to another town are included.
>
>
>
> « Contains » instead of « intersects » doesn’t work either because some
> borders of the field are overlapping and those are not included.
>
>
>
> Exemple with « count » instead of « sum »
>
>
>
> A town have 31 fields spanning over 26km² : Intersects give me a total
> count of 38 and 48km² and contains give me 12 and 4,7 km² because of
> borders overlap.
>
>
>
> I think the solution is with intersection, but i can’t reach a valid
> expression.
>
>
>
> Another solution may be splitting the FIELD_LAYER in as much layer as town
> (I did that) and batch process for each layer :
>
> · sum($area,group_by := FIELD WITH SAME VALUE EVERYWHERE)
>
>
>
> then get the result in the TOWN_LAYER.
>
>
>
> But i don’t know how to batch process it and get the result in the first
> layer.
>
>
>
> And for informations I’m talking hundreds of towns and thousands of
> fields/meadows entities so one by one calculation is not possible.
>
>
>
> I hope I make sense and that someone know how to deal with that.
>
>
>
> Thanks,
>
>
>
> *Edouard BOURGINE*
>
> *Ingénieur Environnement*
>
>
>
> Tél/Fax : 03.83.22.69.09
>
> Port : 06.63.12.99.63
>
>
>
> ACOSOL
>
> 26 rue de l’Ornain
>
> 54520 LAXOU
>
>
>
>
> <https://www.avast.com/sig-email?utm_medium=email_source=link_campaign=sig-email_content=emailclient>
>  Garanti
> sans virus. www.avast.com
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-- 
Drew French
(715) 986-8088
www.ecologicaldesign.land
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Re: [Qgis-user] Sum of field value within same cluster

[Drew French]

What if you create a class field based on areas defined by polygons and
then summed those classes? Then you can also use that field in your print
layout as well, which you cannot do using expressions.

On Tue, Jun 22, 2021 at 9:15 AM Charles Dixon-Paver 
wrote:

> I agree that I think there was a misunderstanding in the requirement,
> however I am unsure how you resolve this with expressions.
>
> In my view, an aggregate expression is what you need, but I am unsure how
> you would be able to retrieve the cluster geometry. The current expression
> is buffering each feature geometry so it's finding nearby neighbouring
> points, not identifying clusters.
>
> You could feasibly collect the geometries within each cluster and retrieve
> a centroid that is buffered using expressions, but identifying which points
> form a part of each cluster would be difficult.
>
> You could probably perform various K-means/ DBSCAN clustering operations
> to get this at the various scales that you need though, then use that
> attribute value with an expression similar to centroid(collect( $geometry,
>  "CLUSTER_ID" )). Once that is done though, you won't need to use the
> spatial intersection in the aggregate expression anymore anyway.
>
> Again, you'll be challenged to find the right buffer distance to make this
> effective, and be able to exclude individual points. This makes the effort
> and utility of the automatic clustering symbology less than ideal for your
> use case as you could generate these styles yourself. It may be easier to
> pay a developer to expose the cluster geometry to the QGIS expressions API.
>
> Hopefully that's helpful and not totally confusing.
>
> Regards
>
> On Tue, 22 Jun 2021 at 15:03, Dario C  wrote:
>
>> Hi Alexandre,
>> thank you for your reply, but I'm not sure I got it. I don't want to see
>> the @cluster_size (number of symbols within the cluster), but the sum of a
>> specific field.
>> I don't know what "@cluster_value" is. I see only @cluster_size
>> and @cluster_colour as options.
>>
>> Thanks
>>
>> Il giorno mar 22 giu 2021 alle ore 12:12 Alexandre Neto <
>> senhor.n...@gmail.com> ha scritto:
>>
>>> Hi Dario,
>>>
>>> You don't need such complicated expression. There's a cluster variable
>>> that returns the value for you. It's @cluster_value.
>>>
>>> This is well documented here:
>>>
>>>
>>> https://docs.qgis.org/3.16/en/docs/user_manual/working_with_vector/vector_properties.html#point-cluster-renderer
>>>
>>> Hope it helped.
>>>
>>> Alexandre Neto
>>> QGIS Support
>>> www.qcooperative.net
>>>
>>>
>>>
>>> A terça, 22/06/2021, 09:55, Dario C  escreveu:
>>>
>>>> Hi,
>>>> I think I'm on the right way using this expression:
>>>>
>>>> aggregate('LayerID','sum',"FIELD",filter:=intersects(buffer($geometry,60),geometry(@parent)))
>>>>
>>>> [image: image.png]
>>>> In point cluster I set 5 mm as distance (size of symbol is 4mm), so I
>>>> thought that the buffer of my expression needed to be 5. Actually 5 does
>>>> not work, so I changed to 5 multiply by the scale of the drawing
>>>> (1/12.000), so I set 60.
>>>> The point is that it works not so precise. In the screenshot you can
>>>> see that, when you have two cluster close each other, the total sum is
>>>> correct, but some parts are shifted to another cluster.
>>>>
>>>> Thanks for your help
>>>>
>>>>
>>>>
>>>> Il giorno dom 20 giu 2021 alle ore 15:15 Dario 
>>>> ha scritto:
>>>>
>>>>> Hi,
>>>>> I’m working on a big scale, so I need to see my points using point
>>>>> cluster.
>>>>> I’d like to see as label the sum of a specific field of the point of
>>>>> the same cluster.
>>>>>
>>>>> I started using aggregate expression and buffer intersection as
>>>>> filter, but nothing good...
>>>>>
>>>>> Thank you in advance.
>>>>>
>>>>> Cheers mm
>>>>>
>>>>> _
>>>>
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-- 
Drew French
(715) 986-8088
www.ecologicaldesign.land
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[Qgis-user] Unable to use Raster Calc in Modeller

[Drew French]

The native raster calculator does not seem to work in the Graphic Modeller
when you use an  algorithm result instead of an input. This is very
frustrating as I wanted to build a model that relies on the calculator for
the final output. I don't have an example but it is as simple as taking an
original DEM, running it through an algorithm to extract a category of
values, and then subtracting those values from the original. The formula is
good - I tested it out in the normal processing toolbox, it works great!
But I want to take that into a model so I can batch process. Thanks for any
thoughts

-- 
Drew French
(715) 986-8088
www.ecologicaldesign.land
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[Qgis-user] Keyframing layers

[Drew French]

Am I correct in understanding that saving a keyframe in a 3D View does not
keyframe the visible layers, i.e keyframing has no effect on visible
vector/raster/mesh layers? I ask because I would like to keyframe a
sequence that includes turning various layers off and on at different
times. Has anyone been able to do this within QGIS? Thank you for your
thoughts.

-- 
Drew French
(715) 986-8088
www.ecologicaldesign.land
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