Re: [Qgis-user] vector point grid to raster grid -- pixel size does not work SOLVED

[Nicolas Cadieux]

Nice to know you got it!

Nicolas Cadieux
Ça va bien aller!

> Le 16 mai 2020 à 06:13, Priv.-Doz. Dr. Maria Shinoto 
>  a écrit :
> 
> Hi, 
> 
> I had some intensive learning during the last days, and thanks again for your 
> help. 
> 
> After all it turns out that it is something Nicolas wrote, it is a matter of 
> the projection. The Japanese software just exported to a projected format, 
> but the original data seem to be in lat long. I found a way to get the 
> unprojected data and now can create a beautiful hillshade in an unprojected 
> lat long layer. And it even looks good in a projected project (EPSG:6670) 
> with on the fly projection. 
> 
> For hydrological analyses I need to use the projected data, but the artifacts 
> do not matter here. While binge-watching YouTube videos I realized that these 
> artifacts occur with the pros as well when they use the projected layers for 
> their analyses. Now everything much better and "in place".
> 
> Best, 
> Maria
> 
> 
>> Am 15.05.2020 um 13:21 schrieb Nicolas Cadieux 
>> :
>> 
>> 
>> 
>> Nicolas Cadieux
>> Ça va bien aller!
>> 
 Le 14 mai 2020 à 23:12, Nicolas Cadieux  a 
 écrit :
>>> 
>>> Hi,
>>> 
>>> 
>>> See below for comments.
>>> 
>>> Nicolas Cadieux
>>> Ça va bien aller!
>>> 
 Le 14 mai 2020 à 22:21, Priv.-Doz. Dr. Maria Shinoto 
  a écrit :
 
 Hi again, 
 
 and sorry for the ongoing discussion.
 
 Today I exported a selection of the DEM data to a shapefile, just 9MB for 
 the main file, and this makes testing very fast.
 
 (A) TINs did not work. 
>>> 
>>> TIn interpolation has memory problems with large data sets.  Same problem 
>>> since QGIS 2x at least.  It was cool features but is not made to handle 
>>> today’s data sets.
 
 (B) I tried all steps carefully again, but even the GDAL raster is 
 horrible now. 
 
 Here are some screenshots with my explanation and the protocol for 
 rasterization and filling nodata. 
 
 It seems that the artifacts are due to no data fields that evolve during 
 rasterization as a pattern. These nodata fields may be due to a slight 
 inclination of the grid from the export of the data with the Japanese 
 software. 
 
 1) The point grid, one can see the inclination
 
>>> <01.jpeg>
 
 
 2) The raster of the same area, one can see the points of the vector point 
 grid along the white empty space; this is NODATA.
 
>>> <02.jpeg>
 
 
>>> I would use gdal_grid not rasterize. Use Gdal grid with a larger search 
>>> circle will solve this problem.  Use nearest neighborhood with a search 
>>> radius larger than the pixel (like 7m).  That will reduce the no data. 
>>> Click on the help or go to the gdal website. That will help you add the 
>>> missing parameters like the -txe and -tye. (The extent) and the -outsize 
>>> for the number of pixels. 
>>> 
 I add the protocol
>>> <2020-05-15-rasterize-protocol-for-selection.txt>
 
 
 
 3) Using the Fill NODATA from the Raster menu makes a beautiful looking 
 raster, there seem to be no flaws.
 
>>> <03.jpeg>
 
 
>>> 
>>> That fixes things but adds new data to the raster. This may be unwanted.
>>> 
 I add the protocol.
 
>>> <2020-05-15-fill-nodata-protocol-for-selection.txt>
 
 
 4) This is the same area as in (3), but instead of a pseudocolor ramp 
 shown as hillshade.
 
>>> <04.jpeg>
 
 
>>> This is normal if you select a bad z factor (probably not the case here).  
>>> You will have the same thing if you zoom in and have nearest neighbour in 
>>> the “zoomed in” under “resampling“ in the hillshade symbology window.
 
 5) This is the impression from a larger area.
 
>>> <05.jpeg>
 
 
 
 6) This is the same small area hillshaded with the GDAL tools. Looks good, 
 but suffers from the same artifacts. 
 
>>> 
>>> No this is way it should look like (Image under).  You can see the pixels 
>>> because you are zoomed in.  Again, select the correct z factor (if x,y are 
>>> in long -lat and z is in meters or feet.) (probably ok here).
>>> 
>>> <06.jpeg>
 
 
 
>>> Play with the resampling zoomed out parameters in symbology 
>>> 
>>> 
 7) The larger area from hillshade in GDAL tools. 
 
>>> <07.jpeg>
 
 
 
 
 
 I sorry to be so insisting on the problem, I think it is not the problem 
 of QGIS, but perhaps there are solutions to such a case. -- The projection 
 is OK, and the base map fits perfectly. 
 
 Best and Thanks to anyone trying to help, 
 Maria
 
 
 
 
> 
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[Qgis-user] QGIS with Garmin Glo

[Martin Valiquette]

Hi
I need help to get my garmin GLO working with QGIS 3.10.5 and windows 10 on
a Windows surface pro

Windows detects the GLO and associate it to COM3, COM4, COM5 and COM6. Why
4?

In QGIS i try all four com port but the blue led on the GLO keeps flashing.

At no time it asks a 4 digit code.

The com port seems to be at 9600 baud. Is that normal?

Am I skipping a configuration step in windows,

Martin
Magog, QC
819-212-2190
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Re: [QGIS-it-user] WMS minambioente down e conseguenze su un progetto qgis

[Andrea Giudiceandrea]

Andrea Giudiceandrea wrote
> Ho fatto il test con la versione 3.10.1, che è l'attuale LTR.

...nel senso che QGIS 3.10 è l'attuale LTR.

A presto.

Andrea



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Re: [QGIS-it-user] WMS minambioente down e conseguenze su un progetto qgis

[Andrea Giudiceandrea]

Aldo Piombino wrote
> ottimo, grazie
> ma su quale versione? 
> perchè non vorrei che fosse una implementazione dopo la 3.4 LTS…

Ho fatto il test con la versione 3.10.1, che è l'attuale LTR.

La versione 3.4 non è più supportata da circa 6 mesi.

Mi sa che la funzionalità è stata introdotta dalla versione 3.6 un paio di
anni fa.

A presto.

Andrea



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Re: [Qgis-user] Export GeoPDF Mac

[Thayer Young]

 To expand on what John said about when Mac OS users will be getting QGIS 
installers with GDAL3 and Proj6:
>From this blog post, they are aiming for QGIS 3.14:  
>https://www.lutraconsulting.co.uk/blog/2020/04/22/qgis-macos-development/
and from the QGIS roadmap 3.14.0 is due to be released on June 19th 2020, the 
final 3.14 point release is on September 11th 2020: 
https://www.qgis.org/en/site/getinvolved/development/roadmap.html#qgis-release-schedule
but failing that you can watch their Twitter feed: 
https://twitter.com/lutraconsulting
But if you can't wait they explain how to compile from code in the blog post 
link.
-Thayer



>Date: Sat, 16 May 2020 15:34:05 +0100
>From: John Layt 
>To: qgis-user ML 
>Subject: Re: [Qgis-user] Export GeoPDF Mac
>Message-ID:
>    
>Content-Type: text/plain; charset="utf-8"
>>The Mac installer is currently packaged with the older version of GDAL
>which doesn't support GeoPDF (your colleague will have the newer version of
>GDAL installed automatically as packaged with the Windows installer). My
>understanding is the Mac package developers (Lutra Consulting) are
>currently working on an update to the Mac package to include the latest
>version of GDAL, so we should have that soon.
>>John.
>>>On Sat, 16 May 2020 at 00:02, Adam Sneath  wrote:
>>> Hello there. I want to export a georeferenced PDF from my QGIS project,
>> and I am unable to tick the box as I need GDAL 3.0. However, my colleague
>> is using windows (I am using a mac) and he is able to export as a GeoPDF
>> without any issue, despite him not having GDAL. I hoped you could help me
>> towards a solution. Thanks

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[Qgis-user] problem with chapter 9.4.20 of the exercises

[jordi badia]

Hi QGIS, I'm performing the 
https://docs.qgis.org/3.10/es/docs/training_manual/complete_analysis/analysis_exercise.html

in specifically in chapter 9.4.20 of rendering a vector layer.
I have installed version 3.10.5-A Coruña, and I do not get to perform 
the rendering, I do not understand where the process is failing after 
trying several methods. I believe that steps 1 to 15 set out in chapter 
9.4.20 currently the website are out of the box for version 3.10.5.
Could someone update them? or give me some help to prove that I'm doing 
wrong?

Thank you


Jordi Badia

jordibadia@gmail.com

-55 41 997418319



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[Qgis-user] Install Python packages on Mac with other Python installations

[Bill Farrand]

I am trying to install a QGIS plug-in (Enmap Box) to QGIS3.12 on my Mac running 
Mojave and it requires several additional Python packages. My default Python 
now is an anaconda version. I can disable that and it goes to the native OSX 
Python 2.7. I’m not sure how to set the Mac terminal window to something where 
I can install Python packages to the version of Python that QGIS 3.12 goes to 
by default. Alternatively, perhaps there is a way to change an environment 
variable in QGIS to one of my already existing Python installations?

Thanks…
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Re: [QGIS-it-user] WMS minambioente down e conseguenze su un progetto qgis

[casper-rw]

Il 18/05/2020 12:49, Andrea Giudiceandrea ha scritto:

Aldo Piombino wrote

purtroppo niente da fare…
e continua a volermi eliminare il layer..


che versione di Qgis stai utilizzando  ?

l'altra questione Quando tornerà online ? any news ?

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[Qgis-user] Geometry Generator - Generating buffered points from polys

[David Fawcett]

Hi,

I am working through an exercise to figure out the best way to represent
some wooded areas in a map that I am making.

The current iteration uses geometry generators to create slightly
randomized points to fill the polygons that represent wooded areas. I based
it off of the great examples at
https://impermanent.io/2017/05/05/generative-pseudo-random-polygon-fill-patterns-in-qgis/
And, it works great!

After looking at it a while, I want to introduce some variability in the
size of the point symbols too.

I have two ideas on how to do that:

The first one is to create and populate an attribute for each point
feature, and then apply symbology rules based on that value. The challenge
is that right now, my custom function is returning multi-point features, so
all of the points within a forest poly would have the same attribute.

I am currently pursuing the second one. That strategy is to use the same
altered grid of points, and then buffer each point. I am having a hard time
figuring out how to return a layer with several multi-polygon features
created by buffering the points.

In this example, "buffer" is not defined, so the expression is invalid.

  for xOff in range(countX+1):
for yOff in range(countY+1):
  ptX = xMin + xOff*(xInterval) + rand * random.uniform(0,xInterval)
  ptY = yMin + yOff*(yInterval) + rand * random.uniform(0,xInterval)

  pt = QgsPointXY(ptX,ptY)
  point = QgsGeometry.fromPointXY(pt)


  if feature.geometry().contains(point):
  sym = buffer(point,200.0,10)
  #points.append(pt)
  bufs.append(sym)

  return collect_geometries(bufs)
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Re: [QGIS-it-user] WMS minambioente down e conseguenze su un progetto qgis

[Aldo Piombino]

ottimo, grazie
ma su quale versione? 
perchè non vorrei che fosse una implementazione dopo la 3.4 LTS…
saluti
aldo

Dr. Aldo Piombino
Scienzeedintorni: www.aldopiombino.blogspot.it 
Skype: aldo.piombino



> Il giorno 18 mag 2020, alle ore 12:49, Andrea Giudiceandrea 
>  ha scritto:
> 
> Aldo Piombino wrote
>> purtroppo niente da fare…
>> e continua a volermi eliminare il layer..
> 
> Ciao Aldo,
> io ho provato a settare l'impostazione a 1000 ms (1 secondo) e ad aprire un
> progetto che conteneva un layer del PCN.
> Dopo 1 secondo e mi è apparsa la finestra relativa ai layer non disponibili.
> Era elencato solo il layer del PCN.
> Ho cliccato su Keep Unavailable Layers e il progetto si è aperto mantenendo
> il layer del PCN.
> 
> A presto.
> 
> Andrea
> 
> 
> 
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Re: [Qgis-user] Export GeoPDF Mac

[Matthew Peters]

Hi Adam,

I was also interested in this capability, but hit the following roadblock - 
which I would be grateful if anyone can help resolve:

The GDAL version (2.4.1) that comes packaged with the all-in-one installer for 
Mac (for QGIS 3.12, 3.10. 3.4) apparently can’t support GeoPDF creation, yet I 
could find no source for the more current GDAL  version (3.0+) that is needed. 
It appears this newer version is available for non-Mac installs, but not yet 
for Mac. Anyone know differently? This effectively seems to mean that in fact 
GeoPDF creation is not  currently supported for Mac installs. 

Depending on your needs you may find exporting to Geotiff (which does work on 
Mac) as a viable alternative, though it creates larger files. For instance, if 
you want the GeoPDF (geospatial PDF=not the same thing) for use in a mobile 
mapping app like Avenza, then the Geotiff is a workable alternative - just make 
sure to check the box to export the associated world file and then bundle this 
with the tiff in a Zip before importing to Avenza.

Here are a couple related threads, but unfortunately there seems to be no 
resolution yet:
https://gis.stackexchange.com/questions/345761/export-geospatial-pdf-from-qgis-on-mac
 

https://gis.stackexchange.com/questions/354383/updating-gdal-to-3-0-from-2-4-1-on-mac-to-create-geopdfs-in-qgis-3-10
 


Hope this gets resolved in coming versions, it sure would be nice for Mac users 
to have access this functionality.

Best,
Matt Peters



> 
> Message: 1
> Date: Sat, 16 May 2020 00:02:27 +0100
> From: Adam Sneath 
> To: qgis-user@lists.osgeo.org
> Subject: [Qgis-user] Export GeoPDF Mac
> Message-ID: <97c62762-16f4-441d-ae58-271d78033...@gmail.com>
> Content-Type: text/plain; charset="utf-8"
> 
> Hello there. I want to export a georeferenced PDF from my QGIS project, and I 
> am unable to tick the box as I need GDAL 3.0. However, my colleague is using 
> windows (I am using a mac) and he is able to export as a GeoPDF without any 
> issue, despite him not having GDAL. I hoped you could help me towards a 
> solution. Thanks
> -- next part --
> An HTML attachment was scrubbed...
> URL: 
> 
> 
> --
> 
> Message: 2
> Date: Sat, 16 May 2020 11:07:46 +0200
> From: Andreas Neumann 
> To: qgis-user@lists.osgeo.org
> Subject: Re: [Qgis-user] Export GeoPDF Mac
> Message-ID: <421d2695-e6be-6ec4-86c8-212b5fb41...@carto.net>
> Content-Type: text/plain; charset="windows-1252"; Format="flowed"
> 
> Hi Adam,
> 
> GDAL is an integral part of QGIS. QGIS doesn't work without GDAL. So I'm 
> 100% sure that your colleague on Windows also has GDAL. Maybe you just 
> aren't aware of it. If you go to the about screen in the help menu. What 
> does it say there about GDAL? On your Mac and on the Windows 
> installation of your colleague?
> 
> Also: what QGIS version do you use on the Mac? GeoPDF is relatively new 
> and you need both a new GDAL and a new QGIS. But normally you don't have 
> to worry about GDAL. If you use the new MacOS all in one installer, GDAL 
> should be installed automatically with it. With the older way of 
> installing QGIS on the Mac you still had to install it separately. Both 
> approaches have advantages/disadvantages.
> 
> Greetings,
> 
> Andreas
> 

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Re: [Qgis-user] Map contest: mapping Pi for the 3.14 splash screen

[Anita Graser]

Dear Gert-Jan,

Yes, the broad statement was intentional. Please only submit maps if
you're fine with it.

The design will certainly be cropped because we have to design graphics
of different shape and size. Other changes may be applied as well to
ensure that the graphics go well with our overall design.

Regards,

Anita


On 18.05.2020 17:01, gee...@dds.nl wrote:

Hi Anita,

Sorry to be a hair-splitter, but the "Both grayscale and color designs
can be submitted. We reserve the right to decide how to eventually use
them" could be interpreted very broad ;-)

I do suppose that the design will be used as designed, and NOT
cropped, rotated, skewed or otherwise adjusted by any graphic filter?


Regards,

Gert-Jan




Anita Graser schreef op 17-05-2020 10:36:

Hi Rayond,

Thank you for the questions! I meant to include image size requirements
in the instructions but it seems like I didn't. I've now added minimum
resolution requirements (3000x2000px) and further clarifications to the
submission form.

Please DON'T submit finished splash screens. We need the raw map /
graphics to create all the graphics that are needed for a release
design.

Both grayscale and color designs can be submitted. We reserve the right
to decide how to eventually use them.

The form now states "By uploading your map you grant QGIS.ORG unlimited
rights to use the map. Please do NOT submit graphics which are protected
be somebody else's copyright!". If a checkbox is needed for legal
reasons, please let me know.

I'd stick with "Pi" rather than the greek character for simplicity

Regards,

Anita


On 17.05.2020 10:21, Raymond Nijssen wrote:

Hi Anita,

Great challenge for the (boring!) weekend. :)

Could you provide some guidelines for submissions?

I tried to find the image dimensions and came to 600x300 px, but that
is the splash screen size for the dev version. The 3.12 splash screen
is 1977x946 px.

Can colours be used or should it be gray scale and made green in the
style of the other 3.x splash screens?

In the announcement of the 3.12 splash screen you refer to the GIMP
file in the "QGIS graphics folder on Google Drive" but I don't have a
link. Could you share it, or share the GIMP file in another way?

Shouldn't the submission form contain a checkbox for sharing the image
as GPL2 or something else to make sure it does not contain copyrighted
material and QGIS can use it?


And wondering, will we go for "Pi" or "π" (the Greek character, I'm
not even sure the email software will show this correctly...) :)

Thanks and have a nice weekend!

Raymond



On 14-05-2020 13:44, Anita Graser wrote:

Dear QGIS mappers,

As you may have noticed, the next release version will be 3.14 and
therefore, we will call it 'Pi'.

Usually our versions are named for community meeting locations and the
splash screen shows a map related to this location.

For 3.14 we are looking for creative maps that capture the essence of
Pi.

All submissions will receive an honorable mention in the release blog
post.

The winner will see their map on the release splash screen and
banner on
qgis.org.

To participate, please submit your maps at
https://forms.gle/DbLL3BfvwYw33qfJ8

The deadline is 31st May 2020.

Regards,

Anita






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Re: [Qgis-user] qgis on IPAD PRO

[Saber Razmjooei]

You can use https://inputapp.io which is based on QGIS and optimised for
touch devices (https://github.com/lutraconsulting/input).

For more tutorial, see:
https://www.lutraconsulting.co.uk/blog/2020/02/14/survey-qgis-input/
https://www.lutraconsulting.co.uk/blog/2020/03/26/recording-tracks-input/

Kind regards
Saber


On Mon, 18 May 2020 at 16:33, Christoph Jung  wrote:

> Hi Giovanni,
>
> There is no iOS-/iPad-App of QGIS. The only possibility to „run QGIS on an
> iPad“ would be Sidecar. But this will only be a mirroring to the iPad.
>
> Sincerely,
> Christoph
>
> > Am 18.05.2020 um 16:29 schrieb Giovanni Rinaldi <
> giovannirinaldi_...@fastwebnet.it>:
> >
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Re: [Qgis-user] qgis on IPAD PRO

[Christoph Jung]

Hi Giovanni,

There is no iOS-/iPad-App of QGIS. The only possibility to „run QGIS on an 
iPad“ would be Sidecar. But this will only be a mirroring to the iPad. 

Sincerely,
Christoph

> Am 18.05.2020 um 16:29 schrieb Giovanni Rinaldi 
> :
> 
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Re: [QGIS-it-user] WMS minambioente down e conseguenze su un progetto qgis

[Andrea Giudiceandrea]

Aldo Piombino wrote
> purtroppo niente da fare…
> e continua a volermi eliminare il layer..

Ciao Aldo,
io ho provato a settare l'impostazione a 1000 ms (1 secondo) e ad aprire un
progetto che conteneva un layer del PCN.
Dopo 1 secondo e mi è apparsa la finestra relativa ai layer non disponibili.
Era elencato solo il layer del PCN.
Ho cliccato su Keep Unavailable Layers e il progetto si è aperto mantenendo
il layer del PCN.

A presto.

Andrea



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Re: [Qgis-user] Export GeoPDF Mac

[Andreas Neumann]

Hi all,

Seems like you just have to be patient until the MacOS packager finds 
time to upgrade all the dependencies to newer library versions.


This is also dependent on efforts to move the Mac build system from 
homebrew to an independent build system - so it is not just the simple 
upgrading, but the whole Mac build system needs a lot of work.


See also https://github.com/qgis/QGIS-Enhancement-Proposals/issues/177

which was just prepared today to be submitted as a QGIS grant proposal. 
Don't expect this to happen before summer.


Greetings,

Andreas

Am 18.05.20 um 15:53 schrieb Matthew Peters:

Hi Adam,

I was also interested in this capability, but hit the following 
roadblock - which I would be grateful if anyone can help resolve:


The GDAL version (2.4.1) that comes packaged with the all-in-one 
installer for Mac (for QGIS 3.12, 3.10. 3.4) apparently can’t support 
GeoPDF creation, yet I could find no source for the more current GDAL 
 version (3.0+) that is needed. It appears this newer version is 
available for non-Mac installs, but not yet for Mac. Anyone know 
differently? This effectively seems to mean that in fact GeoPDF 
creation is not  currently supported for Mac installs.


Depending on your needs you may find exporting to Geotiff (which does 
work on Mac) as a viable alternative, though it creates larger files. 
For instance, if you want the GeoPDF (geospatial PDF=not the same 
thing) for use in a mobile mapping app like Avenza, then the Geotiff 
is a workable alternative - just make sure to check the box to export 
the associated world file and then bundle this with the tiff in a Zip 
before importing to Avenza.


Here are a couple related threads, but unfortunately there seems to be 
no resolution yet:

https://gis.stackexchange.com/questions/345761/export-geospatial-pdf-from-qgis-on-mac
https://gis.stackexchange.com/questions/354383/updating-gdal-to-3-0-from-2-4-1-on-mac-to-create-geopdfs-in-qgis-3-10

Hope this gets resolved in coming versions, it sure would be nice for 
Mac users to have access this functionality.


Best,
Matt Peters





Message: 1
Date: Sat, 16 May 2020 00:02:27 +0100
From: Adam Sneath mailto:adamsnea...@gmail.com>>
To: qgis-user@lists.osgeo.org 
Subject: [Qgis-user] Export GeoPDF Mac
Message-ID: <97c62762-16f4-441d-ae58-271d78033...@gmail.com 
>

Content-Type: text/plain; charset="utf-8"

Hello there. I want to export a georeferenced PDF from my QGIS 
project, and I am unable to tick the box as I need GDAL 3.0. However, 
my colleague is using windows (I am using a mac) and he is able to 
export as a GeoPDF without any issue, despite him not having GDAL. I 
hoped you could help me towards a solution. Thanks

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Message: 2
Date: Sat, 16 May 2020 11:07:46 +0200
From: Andreas Neumann mailto:a.neum...@carto.net>>
To: qgis-user@lists.osgeo.org 
Subject: Re: [Qgis-user] Export GeoPDF Mac
Message-ID: <421d2695-e6be-6ec4-86c8-212b5fb41...@carto.net 
>

Content-Type: text/plain; charset="windows-1252"; Format="flowed"

Hi Adam,

GDAL is an integral part of QGIS. QGIS doesn't work without GDAL. So I'm
100% sure that your colleague on Windows also has GDAL. Maybe you just
aren't aware of it. If you go to the about screen in the help menu. What
does it say there about GDAL? On your Mac and on the Windows
installation of your colleague?

Also: what QGIS version do you use on the Mac? GeoPDF is relatively new
and you need both a new GDAL and a new QGIS. But normally you don't have
to worry about GDAL. If you use the new MacOS all in one installer, GDAL
should be installed automatically with it. With the older way of
installing QGIS on the Mac you still had to install it separately. Both
approaches have advantages/disadvantages.

Greetings,

Andreas




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[Qgis-user] qgis on IPAD PRO

[Giovanni Rinaldi]

Hello here. Does anyone know if qgis works with Ipad Pro 2020 or if there
are issues?
Thanks
 
Giovanni
 
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Re: [QGIS-it-user] Gestione file vettoriali catasto

[Sergio Gollino]

Concordo a pieno, aggiungo una sola precisazione sotto.

Il giorno mer 13 mag 2020 alle ore 10:16  ha scritto:

> Scusate se mi intrometto ma la regione FVG ha una convenzione con AdT e la
> georefernziazione è stata fatta all’interno di quella convenzione.
>
> Il WMS dell’AdT è una riproiezione che ha gli stessi difetti del catasto
> riproiettato. (Non credo che di fronte ad un giudice questo dato possa
> essere utilizzato come prova)  Solo con la trasformazione dei cxf in ETRS89
> /2000 o eventualmente nei vecchio Gauss Boaga potrà essere definito
> ufficiale. Per me l’AdT può in un secondo trasformare tutti i cxf in n
> nuovo sistema di riferimento. Non lo fa; perché?
>

Io sospetto che non lo faccia sia perchè non vuole (e questo è grave), sia
perchè visto come distribuiscono i dati penso pure non ne siano molto
capaci... poi mi sbaglierò...


> Semplicemente perché non sa se è corretto. Pertanto ben venga un lavoro di
> gereferenziazione come è stato fatto dalla reg FVG.
>
> L’agenzia del territorio che si tenga i file come vuole e questi sono di
> per se ufficiali. La regione ha i suoi file georiferiti, bene e permette a
> tutti di lavorare meglio.
>
> Se vogliamo possiamo dibattere su tipo di trasformazione da applicare. La
> regione FVG a mio parere ha sbagliato nel proporre un trasformazione affine
> che non permette di avere una perfetta sovrapposizione tra le due basi ( in
> locale ).
>
>
>
> I 10 metri di differenza sono gravissimi ma pe il WMS che è georiferito ma
> non si sa come (segreto di stato?) . *Che l’AdT abbia il coraggio di
> apporre la trasformazione al file cxf* (ci voglio secondi non decenni)
>
> Saluti
>
>
>
> P.S.
>
> Il CXF è un file dell’agenzia
>
> Nessun professionista si prenderebbe cura di produrre ex novo un file CXF
> (eventualmente di riproiettare lo stesso).
>
> Edifici di Carta tecnica e del catasto non sono congrui sia per la
> sgrondatura che non c’è in CTRN e neanche per precisione catastale (a volte
> li trovi addirittura specchiati).
>


> Per il PRGC il catasto non serve da supporto cartografico (del quale
> faremmo decisamente a meno) ma solo come definizione dell’assetto
> proprietario (fondamentale).
>

Non in regione FVG, dove il PRGC è previsto in scala 1:2.000 su base
catastale per i centri abitati... immagino che nelle regioni a statuto
ordinario sia diverso.


Il catasto non è probatorio.
>

Già... assurdo ma vero. Prego rivolgersi all'altro sportello per il
lasciapasser A38.


>
> *Da:* QGIS-it-user [mailto:qgis-it-user-boun...@lists.osgeo.org] *Per
> conto di *Sergio Gollino
> *Inviato:* mercoledì 13 maggio 2020 09:21
> *A:* Massimo Figaroli 
> *Cc:* Utenti QGIS it 
> *Oggetto:* Re: [QGIS-it-user] Gestione file vettoriali catasto
>
>
>
> Vediamo se riesco a fare un po' di chiarezza o più probabilmente a
> complicare le cose...
>
>
>
> Il giorno mar 12 mag 2020 alle ore 17:53 Massimo Figaroli <
> massimo.figar...@gmail.com> ha scritto:
>
> Buongiorno,
>
> scrivere per chiedere cortesemente un aiuto in relazione alla "gestione"
> dei file vettoriali CXF del catasto, nell'ambito dei lavori attinenti la
> redazione dello strumento urbanistico comunale.
>
> L'obiettivo è di poter utilizzare il plugin CDU Creator sviluppato da Gter
> srl.
>
>
>
> Contestualizzo qui di seguito:
>
> - file cxf del catasto, *comune lombardo* (al momento dispongo di una
> fornitura parziale)
>
> - al caricamento in QGIS il sistema di riferimento che assegno ai
> vettoriali è EPSG 3003
>
> - tramite il software VERTO online, riproietto i dati in EPSG 25832
>
>
>
> Dopo aver verificato la corrispondenza dei vettoriali confrontandoli con
> il wms dell'Agenzia delle Entrate, procedo caricando i shapefile degli
> edifici comunali, in modo da confrontarli con il vettore dei fabbricati.
>
> I shapefile degli edifici comunali (come quelli dello strumento
> urbanistico), sono in EPSG 32632.
>
> La sovrapposizione tra edifici comunali e fabbricati però non c'è: le
> differenze sono variabili tra 1 e 7 metri (dipende dai punti) ed inoltre in
> molti casi si ha una roto-traslazione.
>
> Fermo restando che la forma dei poligoni (edifici e fabbricati) è
> differente, noto che vi sono anche forme diverse nei poligoni delle
> particelle (confronto tra vettore e wms) e in alcuni casi il wms mostra
> delle particelle non presenti nel vettoriale (vettoriali richiesti una
> decina di giorni fa... com'è possibile?).
>
>
>
> Il file Cxf arriva dal comune? O dal precedente professionista? o dal
> precedente PRGC? molto spesso il comune e i professionisti non aggiornano
> il dato e ti mandano sempre quello. Questo è il motivo per cui trovi
> particelle in più rispetto al wms che dovrebbe essere quello corretto e
> aggiornato.
>
>
>
> Gli edifici da cosa derivano? carta tecnica? PRGC (che a sua volta
> probabilmente li ha presi dalla CTRN)? I criteri di digitalizzazione fra
> ctr e catasto sono diversi (detta in parole povere la ctrn rappresenta il
> tetto dell'edificio mentre il catasto i muri) questo 

[QGIS-it-user] Fwd: [QGIS-Developer] QGIS and spatialite

[matteo]

FYI su Sptalialite


 Forwarded Message 
Subject:Re: [QGIS-Developer] QGIS and spatialite
Date:   Mon, 18 May 2020 14:38:05 +0200
From:   Even Rouault 
To: qgis-develo...@lists.osgeo.org



Andreas,

 

> I am struggling with libspatialite. What libspatialite versions are you

> guys using?  I am trying to compile libspatialite-4.3.0a, but it

> complains about not finding "proj_api.h" (although this file is

> available at /usr/local/include). I tried both with proj-6.3.2 and

> proj-7.0.1. libspatialite-4.3.0a isn't happy with either proj version.

 

For 4.3.0a:

 

CFLAGS="-DACCEPT_USE_OF_DEPRECATED_PROJ_API_H -O2 should help:

https://github.com/OSGeo/gdal/blob/master/gdal/docker/alpine-normal/Dockerfile#L248

 

You can also build against the development repository of Spatialite:

https://github.com/OSGeo/gdal/blob/master/gdal/ci/travis/ubuntu_1804/install.sh#L27

(you could probably drop the "fossil update 90180e065d" which must have
been a

workaround against a regression, and the other peculiarities), so mostly:

 

fossil clone https://www.gaia-gis.it/fossil/libspatialite
libspatialite.fossil

mkdir sl

cd sl

fossil open ../libspatialite.fossil

./configure [...]

 

> I noticed that there

> hadn't been a lot of activity with this library in the past months/years.

 

Yes, I've tried to maintain a communication channel with the developper,
but with

moderate success only. The development is not abandoned, but only at a
rather slow

pace.

 

> On a related question: could I build QGIS without libspatialite? I

> failed to do so, but maybe there are some tricks.

 

I don't think you can without some surgery in the code base.

FWIW, the WFS provider depends on it for caching (could potentially be
replaced by

something else)

 

Even

 

-- 

Spatialys - Geospatial professional services

http://www.spatialys.com

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