Re: [QGIS-it-user] Primo ritrovo QGIS-IT

[skampus]

Url corretto all'evento

https://github.com/qgis-it/qgis-it.github.io/wiki/QHF-IT1



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Re: [Qgis-user] Tiff with jpeg compression

[Randal Hale]

My big fear this weekend was I was doing something wrong. I used your 
example and now it's not crashing on me. I had it -co 'TILED=YES' - I 
just mistyped in the email. I need to update some notes on my end now to 
make sure I do this right from here on out.


Andreas and list - I thank you.

Randy


On 05/08/2017 09:46 AM, Neumann, Andreas wrote:


Hi Randal,

A crash is always a  bug, in my opinion, even if your file isn't 
optimized.


Note, that the correct parameter is "tiled=yes" not "tiles=yes". Not 
sure if this helps.


Fyi - here is one of my examples with gdal_warp:

gdalwarp -of GTiff -wm 500 --config GDAL_CACHEMAX 500 -multi -wo 
NUM_THREADS=2 -wo OPTIMIZE_SIZE=TRUE -srcnodata "255 255 255" 
-dstnodata '255 255 255' -t_srs 'EPSG:2056' -co 'BIGTIFF=YES' -co 
'TILED=YES' -co 'COMPRESS=JPEG' -co 'JPEG_QUALITY=85' -co 
'PHOTOMETRIC=YCBCR' -co 'SPARSE_OK=TRUE' Originaldaten/*.tif 
DOP2011_LV95.tif


the PHOTOMETRIC=YCBCR is specifically to be used for aerial images or 
satellite images.


Of course, for good performance, you also need the pyramids:

gdaladdo -r cubic --config BIGTIFF_OVERVIEW YES --config 
COMPRESS_OVERVIEW JPEG --config JPEG_QUALITY 85 --config 
PHOTOMETRIC_OVERVIEW YCBCR --config INTERLEAVE_OVERVIEW PIXEL 
DOP2016_LV95.tif 2 4 8 16 32 64 128 256


Hope this helps,

Andreas

On 2017-05-08 15:29, Randal Hale wrote:


  * QGIS: 2.18.7
  * GDAL 2.1.3

I have a tiff file. I decided to jpeg compress it for some help with 
the size.


I did: gdal_translate -co compress=jpeg -co tiles=yes oldfile.tif 
newfile_jpg.tif


When I open the file in QGIS (2.18.7) on linux it crashes immediately.

When opened on windows if the file is small it takes about a minute 
but displays. If I compress a larger tiff (compressed size is 1.1 gb) 
QGIS on windows crashes.


I checked for bugs and there seems to be a jpeg bug out there: 
https://issues.qgis.org/issues/16049


If I do this with compress=deflate,  QGIS is happy.

Anyway - file a bug report? or I'm doing the compression incorrectly?

Randy
--
-
Randal Hale
North River Geographic Systems, Inc
http://www.northrivergeographic.com
423.653.3611rjh...@northrivergeographic.com
twitter:rjhale

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Randal Hale
North River Geographic Systems, Inc
http://www.northrivergeographic.com
423.653.3611 rjh...@northrivergeographic.com
twitter:rjhale

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Re: [Qgis-user] Tiff with jpeg compression

[Neumann, Andreas]

Hi Randal, 

A crash is always a  bug, in my opinion, even if your file isn't
optimized. 

Note, that the correct parameter is "tiled=yes" not "tiles=yes". Not
sure if this helps. 

Fyi - here is one of my examples with gdal_warp: 

gdalwarp -of GTiff -wm 500 --config GDAL_CACHEMAX 500 -multi -wo
NUM_THREADS=2 -wo OPTIMIZE_SIZE=TRUE -srcnodata "255 255 255" -dstnodata
'255 255 255' -t_srs 'EPSG:2056' -co 'BIGTIFF=YES' -co 'TILED=YES' -co
'COMPRESS=JPEG' -co 'JPEG_QUALITY=85' -co 'PHOTOMETRIC=YCBCR' -co
'SPARSE_OK=TRUE' Originaldaten/*.tif DOP2011_LV95.tif 

the PHOTOMETRIC=YCBCR is specifically to be used for aerial images or
satellite images. 

Of course, for good performance, you also need the pyramids: 

gdaladdo -r cubic --config BIGTIFF_OVERVIEW YES --config
COMPRESS_OVERVIEW JPEG --config JPEG_QUALITY 85 --config
PHOTOMETRIC_OVERVIEW YCBCR --config INTERLEAVE_OVERVIEW PIXEL
DOP2016_LV95.tif 2 4 8 16 32 64 128 256 

Hope this helps, 

Andreas 

On 2017-05-08 15:29, Randal Hale wrote:

> * QGIS: 2.18.7 
> * GDAL 2.1.3
> 
> I have a tiff file. I decided to jpeg compress it for some help with the 
> size. 
> 
> I did: gdal_translate -co compress=jpeg -co tiles=yes oldfile.tif 
> newfile_jpg.tif 
> 
> When I open the file in QGIS (2.18.7) on linux it crashes immediately. 
> 
> When opened on windows if the file is small it takes about a minute but 
> displays. If I compress a larger tiff (compressed size is 1.1 gb) QGIS on 
> windows crashes. 
> 
> I checked for bugs and there seems to be a jpeg bug out there: 
> https://issues.qgis.org/issues/16049 
> 
> If I do this with compress=deflate,  QGIS is happy. 
> 
> Anyway - file a bug report? or I'm doing the compression incorrectly? Randy
> 
> -- 
> -
> Randal Hale
> North River Geographic Systems, Inc
> http://www.northrivergeographic.com
> 423.653.3611 rjh...@northrivergeographic.com
> twitter:rjhale
> 
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[Qgis-user] Tiff with jpeg compression

[Randal Hale]

 * QGIS: 2.18.7
 * GDAL 2.1.3

I have a tiff file. I decided to jpeg compress it for some help with the 
size.


I did: gdal_translate -co compress=jpeg -co tiles=yes oldfile.tif 
newfile_jpg.tif


When I open the file in QGIS (2.18.7) on linux it crashes immediately.

When opened on windows if the file is small it takes about a minute but 
displays. If I compress a larger tiff (compressed size is 1.1 gb) QGIS 
on windows crashes.


I checked for bugs and there seems to be a jpeg bug out there: 
https://issues.qgis.org/issues/16049


If I do this with compress=deflate,  QGIS is happy.

Anyway - file a bug report? or I'm doing the compression incorrectly?

Randy

--
-
Randal Hale
North River Geographic Systems, Inc
http://www.northrivergeographic.com
423.653.3611 rjh...@northrivergeographic.com
twitter:rjhale

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[Qgis-user] Keeping only POIs X kms from a trace?

[Winfried]

Hello 

Archie's Campings* offers a pretty thorough list of campsites in Europe. 

Problem is, files are only country-size, so the number of waypoints is
overwhelming (Here's the UK for instance**). 

To plan bike tours, I'd like to… 
1) import a trace from a GPX file, 
2) import Archie's list for a given country, 
3) filter that list to only keep campsites that are 5 kms from the route,
and 
4) export the output to a GPX file. 

This can be probably be done with QGIS, but I know nothing about GIS :-/

Thanks for any help.

* http://www.archiescampings.eu/ 
** https://s7.postimg.org/4mck58dbf/Archie.s.Campings.UK.png 



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Re: [Qgis-user] Virus detected in qgis.g.browser.7.exe: False positive?

[Winfried]

Will do. Thank you.



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Re: [Qgis-user] Virus detected in qgis.g.browser.7.exe: False positive?

[Winfried]

Correction: It's 2.18:

QGIS-OSGeo4W-2.18.7-1-Setup-x86.exe



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[Qgis-user] Virus detected in qgis.g.browser.7.exe: False positive?

[Winfried]

Hello

I installed QGIS 2.14 last night.

Today, without working with QGIS, Comodo AV says it detected a virus in
qgis.g.browser.7.exe:

https://s17.postimg.org/acdl8h4vj/QGIS.Comodo.AV.alert.png

False positive?

Thank you.



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Re: [Qgis-user] Value Tool Maintainer? - Bilinear interpolation in value tool plugin

[Paolo Cavallini]

Hi all,
this is a side effect of our migration to the new Redmin.
Etienne, could you please upload the code to another repo (GitHub and
GitLab are the most popular)?
I'm ready to help if needed.
All the best, and thanks.

Il 08/05/2017 08:20, Werner Macho ha scritto:
> Hi Lukas!
> 
> Good to hear that I am not alone anymore.
> Drop me a note with your github username to get write access to the 
> repository.
> Would be nice to follow the path - and even more - to combine every
> function into one plugin.
> 
> I am already thinking about implementing another graphical library
> since PyQwt is more or less dead :( ..
> But vispy somehow seems to be "not ready" yet .. we'll see.
> With Qt5 PyQwt must be dropped anyway .. and matplotlib is incredible slow..
> 
> But lets discuss that once we are on porting.
> 
> regards
> Werner
> 
> On Sun, May 7, 2017 at 6:17 PM, Lukas Winiwarter
>  wrote:
>> Hi Werner,
>>
>> it seems to me the best option would be to join your fork - I'll gladly
>> accept your invitation. I'll take some looks at the source code of both
>> Etienne's and your repo tomorrow. Also, I might be able to help with the
>> migration to QGIS3, depending on the projects I'll have at that time. But
>> it's definetely something I'd like to do.
>>
>> @Richard, Etienne: In my opinion it would make sense to have a single plugin
>> covering your, Werner's and my work - would you be willing to pull the
>> updated version for QGIS3, once finished, or arrange some other common repo
>> for QGIS3?
>>
>> Best regards,
>>
>> Lukas
>>
>>
>> Am 06.05.2017 um 11:02 schrieb Werner Macho:
>>>
>>> Hi Lukas,
>>>
>>> A few days (well, to be honest I think it's actually years) I forked the
>>> Valuetool to extend it with the ability to display temporal structured
>>> raster data values.
>>> I try to maintain my version of "Valuetool" as good as I can (though I
>>> now have to finish my thesis about this topic before going back to
>>> actually work on it again).
>>> An update/upgrade for QGIS 3.0 is definitely planned.
>>> So if you like to work on it (and probably migrate your patch over to my
>>> version) you can take a look at
>>>
>>> https://github.com/mach0/mutant
>>>
>>> You are more than welcome to join. If everything works good I am going
>>> to start porting to QGIS 3.0 with July 2017.
>>>
>>> Please give it a try .. and please report errors or malfunctions ;)
>>>
>>> (For better communications I would be in vienna at least once a month)
>>>
>>> kind regards
>>> Werner
>>>
>>> On 05/05/17 17:05, Lukas Winiwarter wrote:

 Hi all,

 I have just implemented a bilinear interpolation as an addition to the
 very good Value Tool-Plugin for raster data and wanted to contact the
 authors to arrange for a possible pull request.

 Unfortunately, the links given at
 http://plugins.qgis.org/plugins/valuetool/ are dead - does anybody know
 how to contribute/contact the authors/maintainer?

 Best regards,
 Lukas

>>
>> --
>> Lukas WiniwarterTU Wien,
>> Stud. Ass.  Department of Geodesy and
>> Tel: +43-(0)1-58801-12246   Geoinformation (E120),
>> Fax: +43-(0)1-58801-912246  Research Group Photogrammetry
>> Email: lukas.winiwar...@tuwien.ac.atGußhausstraße 27-29
>> http://photo.geo.tuwien.ac.at/  1040 Vienna, Austria
>>
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-- 
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QGIS & PostGIS courses: http://www.faunalia.eu/training.html
https://www.google.com/trends/explore?date=all=IT=qgis,arcgis
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Re: [Qgis-user] Value Tool Maintainer? - Bilinear interpolation in value tool plugin

[Werner Macho]

Hi Lukas!

Good to hear that I am not alone anymore.
Drop me a note with your github username to get write access to the repository.
Would be nice to follow the path - and even more - to combine every
function into one plugin.

I am already thinking about implementing another graphical library
since PyQwt is more or less dead :( ..
But vispy somehow seems to be "not ready" yet .. we'll see.
With Qt5 PyQwt must be dropped anyway .. and matplotlib is incredible slow..

But lets discuss that once we are on porting.

regards
Werner

On Sun, May 7, 2017 at 6:17 PM, Lukas Winiwarter
 wrote:
> Hi Werner,
>
> it seems to me the best option would be to join your fork - I'll gladly
> accept your invitation. I'll take some looks at the source code of both
> Etienne's and your repo tomorrow. Also, I might be able to help with the
> migration to QGIS3, depending on the projects I'll have at that time. But
> it's definetely something I'd like to do.
>
> @Richard, Etienne: In my opinion it would make sense to have a single plugin
> covering your, Werner's and my work - would you be willing to pull the
> updated version for QGIS3, once finished, or arrange some other common repo
> for QGIS3?
>
> Best regards,
>
> Lukas
>
>
> Am 06.05.2017 um 11:02 schrieb Werner Macho:
>>
>> Hi Lukas,
>>
>> A few days (well, to be honest I think it's actually years) I forked the
>> Valuetool to extend it with the ability to display temporal structured
>> raster data values.
>> I try to maintain my version of "Valuetool" as good as I can (though I
>> now have to finish my thesis about this topic before going back to
>> actually work on it again).
>> An update/upgrade for QGIS 3.0 is definitely planned.
>> So if you like to work on it (and probably migrate your patch over to my
>> version) you can take a look at
>>
>> https://github.com/mach0/mutant
>>
>> You are more than welcome to join. If everything works good I am going
>> to start porting to QGIS 3.0 with July 2017.
>>
>> Please give it a try .. and please report errors or malfunctions ;)
>>
>> (For better communications I would be in vienna at least once a month)
>>
>> kind regards
>> Werner
>>
>> On 05/05/17 17:05, Lukas Winiwarter wrote:
>>>
>>> Hi all,
>>>
>>> I have just implemented a bilinear interpolation as an addition to the
>>> very good Value Tool-Plugin for raster data and wanted to contact the
>>> authors to arrange for a possible pull request.
>>>
>>> Unfortunately, the links given at
>>> http://plugins.qgis.org/plugins/valuetool/ are dead - does anybody know
>>> how to contribute/contact the authors/maintainer?
>>>
>>> Best regards,
>>> Lukas
>>>
>
> --
> Lukas WiniwarterTU Wien,
> Stud. Ass.  Department of Geodesy and
> Tel: +43-(0)1-58801-12246   Geoinformation (E120),
> Fax: +43-(0)1-58801-912246  Research Group Photogrammetry
> Email: lukas.winiwar...@tuwien.ac.atGußhausstraße 27-29
> http://photo.geo.tuwien.ac.at/  1040 Vienna, Austria
>
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