Re: [Qgis-user] failed to add WMS layer

2019-08-02 Thread Andrea Peri 
Great.

However for me is also curious why in my tests this not happened when the
wms was qgis server
:)
A.


Il ven 2 ago 2019, 16:48 Richard Duivenvoorde  ha
scritto:

> On 02/08/2019 14.30, Andrea Peri wrote:
> > The bug is due to the wms provider that when you click on "add to map"
> > button try to read from the cache the capability info.
> >
> > If te cache is to zero , in old qgis 2.18 the wms provider do another
> > request getcapabilities to the wms server to have it.
> > Instead in the qgis 3, if the cache if to zero, the request is not saved
> > and the read for add to map fail.
>
> Ok, NOW I can reproduce it :-)
> Found another service which had this.
> But only on Windows (several QGIS versions).
>
> Created an issue:
> https://github.com/qgis/QGIS/issues/31056
>
> Thanks for letting us know.
>
> Regards,
>
> Richard Duivenvoorde
>
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Re: [QGIS-it-user] metodi per individuare piscine con qgis

2019-08-02 Thread SC 

ho trovato per la verità anche questo
https://www.youtube.com/watch?v=UYYW2KTVXOs

solo che fondamentalmente non so una mazza ne cosa serve inizialmente, 
ne quale satellite usare,  ne cosa fare, fondamentalmente la 
documentazione è estremamente complessa


ho i dem di un territorio ma come usarli?
boh vedremo, grazie


Il 02/08/2019 09:39, Studio Multiservice s.s. ha scritto:

ciao SC

prova con questo tutorial per SCP

https://www.hatarilabs.com/ih-en/land-cover-spectral-signatures-determination-with-qgis-3-and-semi-automatic-classification-plugin-scp-6-tutorial 



Poi raccontaci come è andata

Buon lavoro

Alberto


Il giorno gio 1 ago 2019 alle ore 14:03 SC > ha scritto:


salve sarei curioso ti sapere se c'è un metodo semplice per usare
qgis per individuare  piscine tramite qgis su una mappa
satellitare o ortofoto


ho trovato questa procedura per arcigis


https://developers.arcgis.com/python/sample-notebooks/detecting-swimming-pools-using-satellite-image-and-deep-learning/


mi chiedevo se è possibile la stessa cosa su qgis non conosco le
api similari che potrebbero essere usate , magari per fare un
plugin specifico.


leggendo in rete ho letto che potrebbe essere utile il
Semi-Automatic Classification Plugin(SCP) tra l'altro fatto da un
ricercatore italiano

ma il suo uso è piuttosto complesso e onestamente vorrei capire se
esiste una procedura semplificata per fare la cosa in oggetto

c'è qualcuno che fatto/letto qualcosa del genere ?

saluti

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Re: [QGIS-it-user] metodi per individuare piscine con qgis

2019-08-02 Thread SC 

ho trovato per la verità anche questo
https://www.youtube.com/watch?v=UYYW2KTVXOs

solo che fondamentalmente non so una mazza ne cosa serve inizialmente, 
ne quale satellite usare,  ne cosa fare, fondamentalmente la 
documentazione è estremamente complessa


ho i dem di un territorio ma come usarli?
boh vedremo


Il 02/08/2019 09:39, Studio Multiservice s.s. ha scritto:

ciao SC

prova con questo tutorial per SCP

https://www.hatarilabs.com/ih-en/land-cover-spectral-signatures-determination-with-qgis-3-and-semi-automatic-classification-plugin-scp-6-tutorial 



Poi raccontaci come è andata

Buon lavoro

Alberto


Il giorno gio 1 ago 2019 alle ore 14:03 SC > ha scritto:


salve sarei curioso ti sapere se c'è un metodo semplice per usare
qgis per individuare  piscine tramite qgis su una mappa
satellitare o ortofoto


ho trovato questa procedura per arcigis


https://developers.arcgis.com/python/sample-notebooks/detecting-swimming-pools-using-satellite-image-and-deep-learning/


mi chiedevo se è possibile la stessa cosa su qgis non conosco le
api similari che potrebbero essere usate , magari per fare un
plugin specifico.


leggendo in rete ho letto che potrebbe essere utile il
Semi-Automatic Classification Plugin(SCP) tra l'altro fatto da un
ricercatore italiano

ma il suo uso è piuttosto complesso e onestamente vorrei capire se
esiste una procedura semplificata per fare la cosa in oggetto

c'è qualcuno che fatto/letto qualcosa del genere ?

saluti

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[Qgis-user] 3D Map View: Issue with Terrain altitude clamping

2019-08-02 Thread Guilhem Vellut 
>
> Hello,

I am on QGIS 3.8 and I try to setup a 3D visualization. I am on MacBook Pro
13'' 2018 with an Intel Iris Plus Graphics 655 graphic card.

As data, I have a SHP layer with building footprints (polygons) and a
building height attribute (no absolute altitude though), as well as a DEM
raster (SRTM).


I am trying to setup a 3D Map View: In the "3D View" layer properties for
the building layer, I use the height attribute as extrusion and leave the
height at 0. Then for the altitude clamping, I choose Terrain.

My expectation is that the altitude of the buildings will be taken from the
terrain layer configured in the 3D map view and then the extrusion will
happen on top of that.

However, what I get instead in the 3D map view is all my buildings floating
at the same altitude and well above the terrain (see the screenshot at
https://ibb.co/mzPVC1w ). The extrusion seems to work fine. I have tried
with a smaller DEM (cut to the extent of the building layer) but this time
the buildings get below the DEM (see https://ibb.co/FKrJynd ).

Is my expectation about the Terrain altitude clamping wrong ? And it is
supposed to do something completely different ? If it is right, has anyone
managed to make it work (maybe using a different graphic card) ?

Also what is the difference between Terrain altitude clamping and Relative
altitude clamping ?

Thank you for your help.

Guilhem
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Re: [Qgis-user] failed to add WMS layer

2019-08-02 Thread Richard Duivenvoorde 
On 02/08/2019 14.30, Andrea Peri wrote:
> The bug is due to the wms provider that when you click on "add to map"
> button try to read from the cache the capability info.
> 
> If te cache is to zero , in old qgis 2.18 the wms provider do another
> request getcapabilities to the wms server to have it.
> Instead in the qgis 3, if the cache if to zero, the request is not saved
> and the read for add to map fail.

Ok, NOW I can reproduce it :-)
Found another service which had this.
But only on Windows (several QGIS versions).

Created an issue:
https://github.com/qgis/QGIS/issues/31056

Thanks for letting us know.

Regards,

Richard Duivenvoorde
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Re: [Qgis-user] failed to add WMS layer

2019-08-02 Thread Bo Victor Thomsen 

Stewart..

It's the wms server that doesn't work. It has (probably) nothing to to 
with QGIS. I've tried the activate the wms address directly in a Firefox 
browser and it does not return a getcapabilities document (it doesn't 
return anything) .


The wmts adress works though.

Both the WMS and the WMTS addresses are correct according to this http 
page: 
https://basemap.nationalmap.gov/arcgis/rest/services/USGSTopo/MapServer


So I conclude, the USGS has a server/network problem. Since others on 
the list can get a list of layers using the same http address with QGIS 
it's probably a routing problem in the internal network of USGS.


Regards

Bo Victor Thomsen
AestasGIS, Denmark


Den 01-08-2019 kl. 20:08 skrev Stewart Holt:
I use USGS WMS and WMTS layers. At some point in the recent past the 
WMS layers stopped working. I am almost sure they have worked in QGIS 
V3. I usually use WMTS because of the speed, but for final publishing, 
I have seen some cases where a corresponding WMS layer is higher 
definition, so I would like to be able to use it. Also the long 
timeout while starting the project is unfortunate and I don't want to 
delete the WMS layer. Here is a WMS layer which fails:


https://basemap.nationalmap.gov/arcgis/services/USGSTopo/MapServer/WMSServer?request=GetCapabilities=WMS

And a corresponding WMTS layer which works:

https://basemap.nationalmap.gov/arcgis/rest/services/USGSTopo/MapServer/WMTS/1.0.0/WMTSCapabilities.xml

On the failing WMS layer, I have removed it and added it back. When I 
test it I get a message saying that a get capabilities request has 
failed. I hope someone who might be able to figure out what is going 
on can give this URL a try.


Thanks,

Stewart

On Thu, Jul 25, 2019 at 12:20 PM Alessandro Pasotti 
mailto:apaso...@gmail.com>> wrote:




On Thu, Jul 25, 2019 at 12:34 PM Manuel Fernandez
mailto:mfc652...@gmail.com>> wrote:

Hi, everyone. I have a problem
When adding a WMS layer, I get this error:
Capabilities could not be downloaded: Capabilities download
failed: Connection closed.
It used to work.


Can you provide the WMS address?

BTW, I've recently hit a similar issues and it ended up being an
upstream QT issue: https://bugreports.qt.io/browse/QTBUG-76821


Thanks in advance
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-- 
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w3: www.itopen.it 
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--
Med venlig hilsen / Kind regards

Bo Victor Thomsen

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Re: [Qgis-user] failed to add WMS layer

2019-08-02 Thread Alessandro Pasotti 
On Fri, Aug 2, 2019 at 2:31 PM Andrea Peri  wrote:

> Hi,
>
> I know the network plugin. It help me to understand this bug.
>
> The bug is due to the wms provider that when you click on "add to map"
> button try to read from the cache the capability info.
>
> If te cache is to zero , in old qgis 2.18 the wms provider do another
> request getcapabilities to the wms server to have it.
> Instead in the qgis 3, if the cache if to zero, the request is not saved
> and the read for add to map fail.
>
> I notice this happen with mapserver and geosevrver, instead with
> qgis-server don'.
>
> The only explanation I can do is that for qgis-server it used a differente
> code for provider wms.
>

Which is not the case.

-- 
Alessandro Pasotti
w3:   www.itopen.it
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Re: [Qgis-user] failed to add WMS layer

2019-08-02 Thread Andrea Peri 
Hi,

I know the network plugin. It help me to understand this bug.

The bug is due to the wms provider that when you click on "add to map"
button try to read from the cache the capability info.

If te cache is to zero , in old qgis 2.18 the wms provider do another
request getcapabilities to the wms server to have it.
Instead in the qgis 3, if the cache if to zero, the request is not saved
and the read for add to map fail.

I notice this happen with mapserver and geosevrver, instead with
qgis-server don'.

The only explanation I can do is that for qgis-server it used a differente
code for provider wms.

A.


Il giorno ven 2 ago 2019 alle ore 13:31 Richard Duivenvoorde <
rdmaili...@duif.net> ha scritto:

> On 02/08/2019 12.26, Andrea Peri wrote:
> > Are trying to Connect to qgis server?
> > I see the qgis dont have any issues to connect to qgis server.
> >
> > Instead trying to connect to a  wms mapserver or to a wms geoserver.
> > I see the issue.
> >
> > To reply
> > Cache setting size yo zero in
> > Qgis and try to add a map wms to canvas from a mapserver or geoserver
> >
> > Please note that
> > The issue is when click on add to canvas not when connect to retrieve
> > the list of layers.
>
> So it is not the capabilities request that is failing?
> I just tried to reproduce this both on Linux and Windows, setting the
> cache  to 0 and connect to a geoserver instance, and all goes well.
> Both capabilities and getmap requests.
>
> Can you maybe install the 'QGIS Network Logger' plugin? And see what
> requests QGIS is firing to the server?
> And maybe try to replay those requests in a browsers?
>
> Others can reproduce this?
>
> Regards,
>
> Richard Duivenvoorde
>


-- 
-
Andrea Peri
. . . . . . . . .
qwerty àèìòù
-
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Re: [Qgis-user] Informação.

2019-08-02 Thread Fernando M. Roxo da Motta 
On Thu, 1 Aug 2019 15:49:31 -0300, Paulo Brandao
 wrote:


> Boa tarde...
> 
> Onde posso baixar shapefiles dos EUA (divisão dos estados) e da África
> (divisão dos estados) ?
> 
> Pois não estou localizando onde baixar estes arquivos.

  Oi Paulo,


  You can try Natural Earth site:

  http://www.naturalearthdata.com/

  Besides the shapefile format they provide lots of data in geopackage
format.  Depending on the application this format can be even better.

=8<  pt_br  ---

  Oi Paulo,

  Você pode tentar o site do Natural Earth:

  http://www.naturalearthdata.com/

  Além do formato shapefile eles fornecem um monte de dados no formato
geopackage.  Dependendo da aplicação esse formato pode ser melhor.


  HTH


> 
> Obrigado.
> 
> Paulo Brandão.








  Roxo

-- 
 Non luctari, ludare ---+ WYSIWYG
Fernando M. Roxo da Motta   | Editor?
Except where explicitly stated I speak on my own behalf.|  VI !!
PU5RXO  | I see text,
 Quis custodiet ipsos custodes?-+ I get text!
 
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Re: [Qgis-user] Installation of QGIS 3.4 continually crashes

2019-08-02 Thread Yury 
An update, and this is really really weird.


So a colleague of mine save a QGIS3 project on our work network.  If I
double click on it, then I manage to open QGIS 3.4.  I copied it on my PC
and I managed again to open the project in QGIS3 by double clicking.  Then
if I close, and try to open QGIS via the Start menu, it crashes. Why?


Would really like to solve this.

On Tue, 2 Jul 2019 at 13:38, Yury  wrote:

> Yes it is in a separate directory. Tried 3.8 via osgeo and same thing
> happened.
>
> On Tue, 2 Jul 2019, 13:22 Phil Wyatt,  wrote:
>
>> Hi Yury,
>>
>> Are they installed in seperate directories? Maybe try another download in
>> case there was some issue with the download of 3.4.x
>>
>>
>> Cheers - Phil,
>> On the road with his iPad
>>
>> On 2 Jul 2019, at 7:44 pm, Yury  wrote:
>>
>> I cannot get QGIS 3.4 LTR to work on my PC.  I have QGIS 2.18 installed
>> and it works fine.  But after I installed 3.4 and started  the program, it
>> crashes on the splash screen, just after *Starting Python *shows up.
>>
>> Help me please!
>>
>> Yury Zammit
>>
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>>
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Re: [Qgis-user] Raster analysis , Proximity (raster distance)

2019-08-02 Thread Richard McDonnell 
Dimitris,
Thanks for the update, great to hear you got sorted.
Regards,

Richard

From: Dimitris sal 
Sent: 02 August 2019 12:24
To: Richard McDonnell 
Cc: qgis-user@lists.osgeo.org
Subject: Re: [Qgis-user] Raster analysis , Proximity (raster distance)

Hello

Thanks for your help, i found a different way. I used the GRASS tool 
r.grow.distance with the geodesic  metric and I got the desired result.

Regards
Dimitris

Στις Πέμ, 1 Αυγ 2019 στις 4:17 μ.μ., ο/η Richard McDonnell 
mailto:richard.mcdonn...@opw.ie>> έγραψε:
Hi Dimitris,

Best tool available is GDAL. You can use this from within QGIS, by going to, 
Processing Toolbox and typing in repro select Warp (reproject), select your 
Input layer, set your Source CRS and then select the Target CRS.
This should be able to do what you want.
Hope it helps,

Regards,

Richard.


From: Dimitris sal mailto:jimmaras...@gmail.com>>
Sent: 01 August 2019 13:32
To: Richard McDonnell 
mailto:richard.mcdonn...@opw.ie>>
Cc: qgis-user@lists.osgeo.org
Subject: Re: [Qgis-user] Raster analysis , Proximity (raster distance)

I tried to change the CRS to a meter one , i create a new distance analysis 
with it and when i try to convert it back to EPSG 4326 the data in the raster 
was destroyed.

Richard my image is at 700x700 at specific coordinates in degrees. Is there any 
tool i can use to convert the data from my raster from degrees to meters?

Στις Πέμ, 1 Αυγ 2019 στις 2:41 μ.μ., ο/η Richard McDonnell 
mailto:richard.mcdonn...@opw.ie>> έγραψε:
Hi Dimitris,
Welcome!!

To answer your question, use the Georeferenced coordinates and run, the 
distances will be based on the resolution of your image, so 5m resolution will 
result in a proximity raster of 5m intervals.
You might want to set the Maximum distance, as this will help to minimise 
processing and Image size.
Reagrds,

Richard.


From: Qgis-user 
mailto:qgis-user-boun...@lists.osgeo.org>> 
On Behalf Of Dimitris sal
Sent: 01 August 2019 12:13
To: qgis-user@lists.osgeo.org
Subject: [Qgis-user] Raster analysis , Proximity (raster distance)

Hello to all ,

This is my first message here. I am trying to create a proximity map with the 
Raster analysis tool. My problem is that I only get two options for distance 
units , pixels coordinates and georeferenced coordinates while I want to get 
them in meters.

I also used the grass tool , r.grow.distance that provides in advanced 
parameters the option "Output distances in meters instead of map units" If i 
check this option i get the following error ERROR: Raster map or group not 
found.

Does any of you know any workaround for this?

I am using QGiS 3.8.1 with GRASS 7.6.1

Kind regards
Dimitris


Email Disclaimer: http://www.opw.ie/en/disclaimer/
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Re: [Qgis-user] failed to add WMS layer

2019-08-02 Thread Richard Duivenvoorde 
On 02/08/2019 12.26, Andrea Peri wrote:
> Are trying to Connect to qgis server?
> I see the qgis dont have any issues to connect to qgis server.
> 
> Instead trying to connect to a  wms mapserver or to a wms geoserver.
> I see the issue.
> 
> To reply
> Cache setting size yo zero in
> Qgis and try to add a map wms to canvas from a mapserver or geoserver
> 
> Please note that
> The issue is when click on add to canvas not when connect to retrieve
> the list of layers.

So it is not the capabilities request that is failing?
I just tried to reproduce this both on Linux and Windows, setting the
cache  to 0 and connect to a geoserver instance, and all goes well.
Both capabilities and getmap requests.

Can you maybe install the 'QGIS Network Logger' plugin? And see what
requests QGIS is firing to the server?
And maybe try to replay those requests in a browsers?

Others can reproduce this?

Regards,

Richard Duivenvoorde
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Re: [Qgis-user] Raster analysis , Proximity (raster distance)

2019-08-02 Thread Dimitris sal 
Hello

Thanks for your help, i found a different way. I used the GRASS tool
r.grow.distance with the geodesic  metric and I got the desired result.

Regards
Dimitris

Στις Πέμ, 1 Αυγ 2019 στις 4:17 μ.μ., ο/η Richard McDonnell <
richard.mcdonn...@opw.ie> έγραψε:

> Hi Dimitris,
>
>
>
> Best tool available is GDAL. You can use this from within QGIS, by going
> to, *Processing Toolbox* and typing in *repro *select *Warp (reproject)*,
> select your *Input layer*, set your *Source CRS* and then select the *Target
> CRS*.
>
> This should be able to do what you want.
>
> Hope it helps,
>
>
>
> Regards,
>
>
>
> Richard.
>
>
>
>
>
> *From:* Dimitris sal 
> *Sent:* 01 August 2019 13:32
> *To:* Richard McDonnell 
> *Cc:* qgis-user@lists.osgeo.org
> *Subject:* Re: [Qgis-user] Raster analysis , Proximity (raster distance)
>
>
>
> I tried to change the CRS to a meter one , i create a new distance
> analysis with it and when i try to convert it back to EPSG 4326 the data in
> the raster was destroyed.
>
>
>
> Richard my image is at 700x700 at specific coordinates in degrees. Is
> there any tool i can use to convert the data from my raster from degrees to
> meters?
>
>
>
> Στις Πέμ, 1 Αυγ 2019 στις 2:41 μ.μ., ο/η Richard McDonnell <
> richard.mcdonn...@opw.ie> έγραψε:
>
> Hi Dimitris,
>
> Welcome!!
>
>
>
> To answer your question, use the Georeferenced coordinates and run, the
> distances will be based on the resolution of your image, so 5m resolution
> will result in a proximity raster of 5m intervals.
>
> You might want to set the Maximum distance, as this will help to minimise
> processing and Image size.
>
> Reagrds,
>
>
>
> Richard.
>
>
>
>
>
> *From:* Qgis-user  *On Behalf Of *Dimitris
> sal
> *Sent:* 01 August 2019 12:13
> *To:* qgis-user@lists.osgeo.org
> *Subject:* [Qgis-user] Raster analysis , Proximity (raster distance)
>
>
>
> Hello to all ,
>
>
>
> This is my first message here. I am trying to create a proximity map with
> the Raster analysis tool. My problem is that I only get two options for
> distance units , pixels coordinates and georeferenced coordinates while I
> want to get them in meters.
>
>
>
> I also used the grass tool , r.grow.distance that provides in advanced
> parameters the option "Output distances in meters instead of map units" If
> i check this option i get the following error ERROR: Raster map or group
> not found.
>
>
>
> Does any of you know any workaround for this?
>
>
>
> I am using QGiS 3.8.1 with GRASS 7.6.1
>
>
>
> Kind regards
>
> Dimitris
>
>
>
> Email Disclaimer: http://www.opw.ie/en/disclaimer/
>
>
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Re: [Qgis-user] failed to add WMS layer

2019-08-02 Thread Andrea Peri 
Are trying to Connect to qgis server?
I see the qgis dont have any issues to connect to qgis server.

Instead trying to connect to a  wms mapserver or to a wms geoserver.
I see the issue.

To reply
Cache setting size yo zero in
Qgis and try to add a map wms to canvas from a mapserver or geoserver

Please note that
The issue is when click on add to canvas not when connect to retrieve the
list of layers.

I have this issue on qgis 3.8.0 for windows 64 bit.


A.


Il ven 2 ago 2019, 10:57 Richard Duivenvoorde  ha
scritto:

> On 01/08/2019 21.35, Andrea Peri wrote:
> > Have you the cache to zero size?
> > I discovered this kind of strangenissue some weeks ago
> >
> > If the qgis cache size is turn to zero the capabilities fail when go to
> > add the map to the Canvas.
> > This issue is on only with some wms (mapserver, geoserver) do not with
> > qgisserver.
> >
> > I dont know with arcgis rest services.
>
> Hi Andrea,
>
> Can you provide a situation I can reproduce (OS, QGS version, service,
> how you load the caps etc) ? Because this would be a proper issue!
>
> But I cannot reproduce it with 3.4, 3.8 or master that I have running
> here on Debian.
>
> So if you have a good reproducable case, it sounds like it should be fixed.
>
> Thanks,
>
> Richard Duivenvoorde
>
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Re: [Qgis-user] failed to add WMS layer

2019-08-02 Thread Richard Duivenvoorde 
On 01/08/2019 21.35, Andrea Peri wrote:
> Have you the cache to zero size?
> I discovered this kind of strangenissue some weeks ago
> 
> If the qgis cache size is turn to zero the capabilities fail when go to
> add the map to the Canvas.
> This issue is on only with some wms (mapserver, geoserver) do not with
> qgisserver.
> 
> I dont know with arcgis rest services.

Hi Andrea,

Can you provide a situation I can reproduce (OS, QGS version, service,
how you load the caps etc) ? Because this would be a proper issue!

But I cannot reproduce it with 3.4, 3.8 or master that I have running
here on Debian.

So if you have a good reproducable case, it sounds like it should be fixed.

Thanks,

Richard Duivenvoorde
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Re: [QGIS-it-user] metodi per individuare piscine con qgis

2019-08-02 Thread Studio Multiservice s.s. 
ciao SC

prova con questo tutorial per SCP

https://www.hatarilabs.com/ih-en/land-cover-spectral-signatures-determination-with-qgis-3-and-semi-automatic-classification-plugin-scp-6-tutorial


Poi raccontaci come è andata

Buon lavoro

Alberto


Il giorno gio 1 ago 2019 alle ore 14:03 SC  ha
scritto:

> salve sarei curioso ti sapere se c'è un metodo semplice per usare qgis per
> individuare  piscine tramite qgis su una mappa satellitare o ortofoto
>
>
> ho trovato questa procedura per arcigis
>
>
> https://developers.arcgis.com/python/sample-notebooks/detecting-swimming-pools-using-satellite-image-and-deep-learning/
>
>
> mi chiedevo se è possibile la stessa cosa su qgis non conosco le api
> similari che potrebbero essere usate , magari per fare un plugin specifico.
>
>
> leggendo in rete ho letto che potrebbe essere utile il
> Semi-Automatic Classification Plugin (SCP) tra l'altro fatto da un
> ricercatore italiano
> ma il suo uso è piuttosto complesso e onestamente vorrei capire se esiste
> una procedura semplificata per fare la cosa in oggetto
>
> c'è qualcuno che fatto/letto qualcosa del genere ?
>
> saluti
>
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