Re: [Qgis-user] Square Buffer

2023-09-30 Per discussione Michael Jabot via QGIS-User 
Hugh

THANK YOU so much!!  You were correct about the distortion. When I checked
the length of sides with the measure tool (which I didn't do before) it was
a square

I also switched the coordinate system which also helped

THANK YOU again!!

Mike

*
Michael Jabot, Ph.D.
SUNY Distinguished Professor, Science Education
US Partner - *NASA GLOBE Program*

*NASA Earth Ambassador*Director, *Institute for Research in Science
Teaching*

*Chancellor's Award Recipient for Excellence in Research*The State
University of New York at Fredonia



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ja...@fredonia.edu
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*






On Sat, Sep 30, 2023 at 2:58 PM Hugh Kelley  wrote:

> Oops, including the list.
>
> Also, having now written the response and re-read your question, I would
> guess that the coordinate system you are using is causing the distortion
> you see in the result.
>
> I'd be curious to see what others on the list might suggest as the best
> option for crs as I think even state plane would be distorted at least a
> little.
>
> ---‐--
>
> Hi, not in front of my computer so I can't test but I would recommend
> first, creating a round buffer with a diameter equal to the square side you
> are looking for, and then second, using the "extent" tool that's in one of
> the vector tools subcategories to extract the layer extent, creating the
> square you need.
>
> That should create a "square" although, importantly, the idea of a square
> in the gis world is a little fraught as the coordinate system you are using
> can sometimes produce odd results.
>
> I would, at a minimum, use the measure tool to double check that what
> looks like a square truly has a height equal to its width.
>
> On Sat, Sep 30, 2023, 2:39 PM Michael Jabot via QGIS-User <
> qgis-user@lists.osgeo.org> wrote:
>
>> I apologize for posting what I think should be a simple task but I am
>> stumped.
>>
>> I would like to create a 15 km square Buffer around a point for
>> establishing a study site.
>>
>> I have used the buffer tool and set it to square and used 7.5 km as the
>> distance. The buffer that is created is not square but instead is a longer
>> on one set of sides.
>>
>> Again I apologize for bothering people with this ... thank you in advance
>> for your help
>>
>> Mike
>>
>>
>> *
>>
>> Michael Jabot, Ph.D.
>> SUNY Distinguished Professor, Science Education
>>
>> US Partner - NASA GLOBE Program
>>
>> NASA Earth Ambassador
>> Director, Institute for Research in Science Teaching
>>
>> Chancellor's Award Recipient for Excellence in Research
>> The State University of New York at Fredonia
>>
>>
>> 716.320-0189 (Google Voice)
>>
>> ja...@fredonia.edu
>>
>> E250 Thompson Hall
>> 280 Central Avenue
>>
>> Fredonia, NY  14063
>> *
>>
>>
>> ___
>> QGIS-User mailing list
>> 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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Re: [Qgis-user] Square Buffer

2023-09-30 Per discussione Hugh Kelley via QGIS-User 
Oops, including the list.

Also, having now written the response and re-read your question, I would
guess that the coordinate system you are using is causing the distortion
you see in the result.

I'd be curious to see what others on the list might suggest as the best
option for crs as I think even state plane would be distorted at least a
little.

---‐--

Hi, not in front of my computer so I can't test but I would recommend
first, creating a round buffer with a diameter equal to the square side you
are looking for, and then second, using the "extent" tool that's in one of
the vector tools subcategories to extract the layer extent, creating the
square you need.

That should create a "square" although, importantly, the idea of a square
in the gis world is a little fraught as the coordinate system you are using
can sometimes produce odd results.

I would, at a minimum, use the measure tool to double check that what looks
like a square truly has a height equal to its width.

On Sat, Sep 30, 2023, 2:39 PM Michael Jabot via QGIS-User <
qgis-user@lists.osgeo.org> wrote:

> I apologize for posting what I think should be a simple task but I am
> stumped.
>
> I would like to create a 15 km square Buffer around a point for
> establishing a study site.
>
> I have used the buffer tool and set it to square and used 7.5 km as the
> distance. The buffer that is created is not square but instead is a longer
> on one set of sides.
>
> Again I apologize for bothering people with this ... thank you in advance
> for your help
>
> Mike
>
>
> *
>
> Michael Jabot, Ph.D.
> SUNY Distinguished Professor, Science Education
>
> US Partner - NASA GLOBE Program
>
> NASA Earth Ambassador
> Director, Institute for Research in Science Teaching
>
> Chancellor's Award Recipient for Excellence in Research
> The State University of New York at Fredonia
>
>
> 716.320-0189 (Google Voice)
>
> ja...@fredonia.edu
>
> E250 Thompson Hall
> 280 Central Avenue
>
> Fredonia, NY  14063
> *
>
>
> ___
> QGIS-User mailing list
> 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] Square Buffer

2023-09-30 Per discussione Michael Jabot via QGIS-User 
I apologize for posting what I think should be a simple task but I am
stumped.

I would like to create a 15 km square Buffer around a point for
establishing a study site.

I have used the buffer tool and set it to square and used 7.5 km as the
distance. The buffer that is created is not square but instead is a longer
on one set of sides.

Again I apologize for bothering people with this ... thank you in advance
for your help

Mike


*

Michael Jabot, Ph.D.
SUNY Distinguished Professor, Science Education

US Partner - NASA GLOBE Program

NASA Earth Ambassador
Director, Institute for Research in Science Teaching

Chancellor's Award Recipient for Excellence in Research
The State University of New York at Fredonia


716.320-0189 (Google Voice)

ja...@fredonia.edu

E250 Thompson Hall
280 Central Avenue

Fredonia, NY  14063
*
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[QGIS-it-user] Si possono eliminare le cartelle di programma di vecchie versioni disinstallate di QGIS ?

2023-09-30 Per discussione Marco Masciarelli via QGIS-it-user 
Salve, lavoro  con Windows 10 e ho verificato che quando aggiorno la
versione installata di QGIS con quella più nuova disponibile (lavoro con le
versioni più stabili LTR) dopo la disinstallazione  della versione
precedente rimangono alcune cartelle memorizzate. 

Ad esempio ho aggiornato la versione QGIS 3.28.6 con la versione  3.28.11. 

Quindi ho installato la nuova versione QGIS 3.28.11 e disinstallato quella
precedente (con la procedura prevista dal pannello di controllo di Windows
10 visto che non esiste un unistaller).

Della vecchia versione mi rimangono  in C:\Program Files\QGIS 3.28.6 le
seguenti sottocartelle:



E così per tutte le precedenti versioni disinstallate di cui sotto



 

Chiedo quindi se si posso cancellare manualmente le cartelle delle versioni
precedenti (con le relative sottocartelle) senza compromettere il
funzionamento dell’ultima versione installata con vecchi progetti di lavoro.

 

Grazie 

Marco

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[Qgis-user] how to trigger an "action" on a web map

2023-09-30 Per discussione Stephen Sacks via QGIS-User 
In my desktop QGIS project, I define an "action" that opens an HTML page 
and passes parameters to it.  I will use qgis2web to move the project to 
a web site and would like the web user to trigger that action by 
clicking on a feature.  Is there a way to do this?

   Steve

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[QGIS-it-user] Cesium 3D Tile per QGIS

2023-09-30 Per discussione Totò Fiandaca via QGIS-it-user 
Ciao a tutte e tutti,
ieri hanno presentato [1] la nuova caratteristica di QGIS (Cesium 3D Tile
per QGIS) che sarà disponibile a fine ottobre 2023 in QGIS 3.34,
qui [2] ho realizzato una piccola demo.

saluti


[1] https://www.youtube.com/watch?v=vazJlXTcLsw
[2] https://youtu.be/a1ACLOaKGg4

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