[Qgis-user] Single lines for road network

[krishna Ayyala]

Hello,
I have a huge road network that has double lines such as below. We see such
roads mostly for express highways.
[image: image.png]
In the same road network, there are also some streets with single lines
such as below.

[image: image.png]

Is it possible to convert the entire road network such that we have only
single lines and not double lines such as above. Since the road network is
huge, it may not be possible to select manually each segment and run the
tools. Is there an automated tool that can do this for the entire network?

Regards.
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Re: [Qgis-user] Clipping WMS Layer for Export to Geo PDF

[David Strip]

  
  
On 7/30/2021 1:37 PM, Stewart Holt
  wrote:

I
  am working on a GeoPDF map to use in the Avenza map app.
A couple of warnings about GeoPDFs and Avenza:
1. Even if you upload your maps as GeoPDFs, Avenza will rasterize
the map on upload. 
2. At least as of about six months ago, Avenza's rasterizer did not
correctly rasterize line pattern fills. The color was changed and
the fill was a solid fill, not a line pattern. Avenza was aware of
the problem, but didn't have a fix at the time. 

  

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[Qgis-user] Clipping WMS Layer for Export to Geo PDF

[Stewart Holt]

I am working on a GeoPDF map to use in the Avenza map app. It is an 80 mile
hiking trail which stair steps from SW to NE. I am using a WMTS layer as a
background. I want to avoid having the PDF as large as a rectangle
containing this trail. I created a polygon and used it to select the extent
for the map, but it did not clip the map but instead it created a
rectangular extent containing the polygon.

Next I created a larger rectangular polygon covering the area and cut out a
ring for the trail and included this layer in the map. The result was the
inclusion of all of the WMTS  map layer as before with my mask layer able
to block unwanted areas. This does not reduce file size, ofcourse.

I think what that did is the correct behavior. What I need is a way to clip
the WMTS layer on the fly. I think having the export to PDF being able to
do this would be the best approach.

Can anyone think of how to accomplish this without exporting the WMTS layer
and then clipping it with a polygon?

Thanks,

Stewart
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[Qgis-user] Layer actions in one clic ?

[Didier Peeters]

Dear QGIS users,

I have been using actions in QGIS for years and I find them very useful and 
much easier to create than plugins. As a reminder, they can have 4 different 
scopes, which are 'Field', 'Feature', 'Layer' and 'Canvas'.

However, there is one thing I don't understand: when choosing 'Canvas', it is 
always necessary to click on an layer element after choosing the action to be 
used in the attributes toolbar (with the action button - the little wheel). Why 
is this? Wouldn't it be easier to immediately trigger an action by clicking on 
its name in the toolbar?
In particular, I have defined a Python action that fetches a file containing 
data to be imported into a database, with no specific link to a particular 
entity.

So, have I misunderstood the use of the action? Am I missing something?

Or maybe better, would it be possible to have actions not related to any layer ?

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Re: [QGIS-it-user] problema georeferenziatore QGIS 3.16

[Paolo Venturelli]

Grazie Totò, cambiando profilo ha funzionato.
Saluti
Paolo Venturelli

Il giorno gio 29 lug 2021 alle ore 14:45 Totò Fiandaca <
pigrecoinfin...@gmail.com> ha scritto:

> Ho appena fatto una prova su QGIS 3.16.9 OSGeo4W64 v2 win 10
>
> funziona come previsto.
>
> Se hai maggiori dettagli condividili.
>
> Prova a creare un nuovo profilo da Impostazioni.
>
> saluti
>
> Il giorno gio 29 lug 2021 alle ore 14:27 Paolo Venturelli <
> venturelli.pa...@gmail.com> ha scritto:
>
>> Uso la 3.16.9
>>
>> Il giorno gio 29 lug 2021 alle ore 14:16 Totò Fiandaca <
>> pigrecoinfin...@gmail.com> ha scritto:
>>
>>> buongiorno,
>>> che versione di QGIS utilizzi?
>>> ci sono delle versioni in cui il georeferenziatore non va, quindi scrivi
>>> la versione con tutte le cifre es: 3.16.9
>>>
>>> saluti
>>>
>>> Il giorno gio 29 lug 2021 alle ore 12:37 Paolo Venturelli <
>>> venturelli.pa...@gmail.com> ha scritto:
>>>
 Buongiorno a tutti, grazie per avermi iscritto alla lista.
 Ho un problema con il georeferenziatore, non viene effettuata  la
 trasformazione del file, il sistema si blocca subito ad appena 1% di
 avanzamento, il file viene creato, ma non completato.
 win10pro
 qualcuno ha qualche idea per aiutarmi?
 Grazie
 Paolo Venturelli
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>>>
>>>
>>> --
>>> *Ing. Salvatore Fiandaca*
>>> *mobile*.:+39 327.493.8955
>>> *m*: *pigrecoinfin...@gmail.com *
>>> *C.F*.: FNDSVT71E29Z103G
>>> *P.IVA*: 06597870820
>>> *membro QGIS Italia - http://qgis.it/ *
>>> *socio GFOSS.it - *http://gfoss.it/
>>> *blog:*
>>> * https://pigrecoinfinito.com/  FB:
>>> Co-admin - https://www.facebook.com/qgis.it/
>>> **
>>>  *
>>> *TW:  **https://twitter.com/totofiandaca
>>> *
>>>
>>> 43°51'0.54"N  10°34'27.62"E - EPSG:4326
>>>
>>> “Se la conoscenza deve essere aperta a tutti,
>>> perchè mai limitarne l’accesso?”
>>> R. Stallman
>>>
>>> Questo documento, allegati inclusi, contiene informazioni di proprietà
>>> di FIANDACA SALVATORE e deve essere utilizzato esclusivamente dal
>>> destinatario in relazione alle finalità per le quali è stato ricevuto. E'
>>> vietata qualsiasi forma di riproduzione o divulgazione senza l'esplicito
>>> consenso di FIANDACA SALVATORE. Qualora fosse stato ricevuto per errore
>>> si prega di informare tempestivamente il mittente e distruggere la copia in
>>> proprio possesso.
>>>
>>>
>>>
>
> --
> *Ing. Salvatore Fiandaca*
> *mobile*.:+39 327.493.8955
> *m*: *pigrecoinfin...@gmail.com *
> *C.F*.: FNDSVT71E29Z103G
> *P.IVA*: 06597870820
> *membro QGIS Italia - http://qgis.it/ *
> *socio GFOSS.it - *http://gfoss.it/
> *blog:*
> * https://pigrecoinfinito.com/  FB: Co-admin
> - https://www.facebook.com/qgis.it/ **
>  *
> *TW:  **https://twitter.com/totofiandaca
> *
>
> 43°51'0.54"N  10°34'27.62"E - EPSG:4326
>
> “Se la conoscenza deve essere aperta a tutti,
> perchè mai limitarne l’accesso?”
> R. Stallman
>
> Questo documento, allegati inclusi, contiene informazioni di proprietà di
> FIANDACA SALVATORE e deve essere utilizzato esclusivamente dal destinatario
> in relazione alle finalità per le quali è stato ricevuto. E' vietata
> qualsiasi forma di riproduzione o divulgazione senza l'esplicito consenso
> di FIANDACA SALVATORE. Qualora fosse stato ricevuto per errore si prega
> di informare tempestivamente il mittente e distruggere la copia in proprio
> possesso.
>
>
>
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