Re: [Qgis-user] Newbie

[Bernd Vogelgesang]

In short:
Metric Coordinate System
Buffers
Polygons to lines
Save as GPX with CRS WGS84

I assume that you already use a metric coordinate system (DHD Gauss Krüger  
4 or ERTS89 UTM 32N ?), cause you wrote that you digitize your waypoints  
and I assume you have some background map for this.
Working in metric system is crucial, otherwise your buffer units wont be  
meters but degree and your buffers would go all around the planet.


Usually I use the Processing toolbox (Verarbeitung -> Werkzeugkiste) for  
this kind of works and not the default vector tools, cause there you only  
produce temporary layers which frees you from saving each step as a real  
file until you figured out what and how to achieve things.
First, switch the toolbox interface from simplified to advanced (bottom of  
the box)


Search for "buffer" in the toolbox.
Pick "Fixed distance buffer" and in the dialog select your waypoints  
layer, set your radius and decide whether the buffers should be dissolved  
or be individual circles. For nicely curved circles, rise the number of  
segments to e.g. 15 (more points!), if it doesn't matter leave the default  
5.
What you get now is a polygon layer with your buffers, but to be able to  
convert them to a GPX file, you need lines (GPX can't handle polygons)


So again in the toolbox search for "polygons to" and pick the tool  
"polygons to lines" from the SAGA functions.
Hopefully, SAGA is activated and functional in your install (check under  
Processing -> Options -> Providers -> SAGA)
You could also pick the QGIS function with the same name ( a lot of  
functions here have multiple implementations by several providers)


Right-click your lines layer in the Layers List and choose "Save As .."

Format: Choose GPS eXchange Format [GPX]

CRS: click "Change ...) and set the CRS to WGS84 (EPSG 4326)

In case you use a recent version of QGIS (recommended) the other settings  
should be ok.


Click "Browse" to select the destination path and file name for your GPX  
file.


Now it's up to your GPS-device to eat this file or not ... newer Garmins  
directly process gpx files, for older ones you probably need to connect  
the device with GPS plugin.


Hope this works


Cheers
Bernd


Am 18.11.2014, 22:06 Uhr, schrieb Randal Hale  
:


Hello - So to get a circle which we call a buffer: Vector Tools ->  
Geoprocessing Tools -> Buffer Of course you need to know what projection  
your original data is in - if it is in WGS84 the buffer tool won't give  
you the desired results (but will still create a buffer).


QGIS has GPS tools - but I haven't used them very much (PLugins -> GPS  
Tools after checking it look for GPS Tools under the vector menu). I  
have used DNR GPS to upload GPX files into a GPS Unitof course that  
also depends on your GPS unit (but it is possible).


I hope this starts you in the right direrction.

Keep asking questions!

Randy












On 11/18/2014 03:24 PM, Philipp Pfeiffer wrote:

Hello together,

I´m working as a biologist in Germany and therefore I just startet to  
get to know QGis and I really think it´s an excellent tool. But of  
course there will be always things that I just can´t figure out by  
myself.


I have a couple of waypoints and it´s no problem to digitize them or  
upload these to my GPS device. But before I want to upload I have to  
create a specific area around these waypoints (in form of a circle)  
with a certain radius (500m). How do I start to create this circle and  
secondly how do I convert this circle to a track that can read my GPS  
device ?


I hope you understand my question and can give me an answer.

All the best and many thanks.

Kind regards

P.Pfeiffer
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Re: [Qgis-user] Raster: replace a single value with another value

[Andreas Neumann]

Hi,

Ok - now I installed a standalone SAGA 2.1.4 (64bit).

I tried to use my bigger tiff file. When importing it I get the 
following message:

http://webgis.uster.ch/temp/saga_error_message_file_is_abnormally_big.png

My file is 200GB (Packbit compression), ranging between 60'000 and 
70'000 width/height. I don't think this is abnormally big.


Is there another recommended file format besides TIFF that I should 
preferably use with SAGA?


Maybe I should now switch mailing lists and ask this at the SAGA mail 
list ;-)


Thanks,
Andreas

Am 2014-11-18 18:48, schrieb Michael Treglia:

Andreas,

You're running 64bit SAGA, right? (if not sure, click the question
mark on the menu bar, and click "About" - should be towards the top).

I actually like SAGA because I can throw pretty giant files at it. 
Just to test out and make sure, I just loaded in a 10GB GeoTIFF with
integer values, and did a single value reclass that took about 3
minutes. You likely need ample RAM and disk space, but given that you
do, it should be feasible. [Watching the system resources, you can see
the respective amount of memory get taken up as you work with data in
SAGA]

The 4GB limit seems like it could be a 32 bit issue.  I was using the
latest version of SAGA (2.1.3), 64 bit, downloaded from:
http://sourceforge.net/projects/saga-gis/files/SAGA%20-%202.1/SAGA%202.1.3/
[2]

If you're really stuck and need to knock this task out of the way - if
you can get me the data I can do the reclass for you.

hope that helps,
mike

On Tue, Nov 18, 2014 at 10:04 AM, Andreas Neumann
 wrote:


Hi Carlos,

I reprojected to a different swiss projection system and the
expression still does not work. I tested various projections,
including UTM-32N. Very strange ...

There clearly seems to be a bug in the raster calculator. I will
open a bug with high priority.

Thanks for testing and helping!

Andreas

Am 2014-11-18 15:36, schrieb Carlos Cerdán:

Hi Andreas:

It is solved: you have to reproject your TEMP layer. I've tried
with
UTM-32N zone and raster calculator works fine.

Why raster calculator (and SAGA) doesn't work with your original
CRS?
Well, I don't know, perhaps devs group have the answer.

It was a good challenge.

Carlos

2014-11-18 4:37 GMT-05:00 Andreas Neumann :

Hi Carlos,

Thank you for your help!

I tried with

(TEMP@1=249)*255 + (TEMP@1<249)*TEMP@1 + (TEMP@1>249)*TEMP@1

My layer is called "temp". However, the resulting file contains all
0.

I tried in both QGIS 2.4 and 2.6.

Is there something wrong with the input file? It was generated from
a PDF with ghostscript. Here is the metadata:

-

GDAL provider
GTiff
GeoTIFF
Datensatzbeschreibung
//gis/gis/mapserverdata/uep/release_2014_11/temp.tif
TIFFTAG_DATETIME=2014:11:17 09:50:08
TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch)
TIFFTAG_SOFTWARE=GPL Ghostscript 9.10
TIFFTAG_XRESOLUTION=600
TIFFTAG_YRESOLUTION=600
Kanal 1
STATISTICS_MAXIMUM=255
STATISTICS_MEAN=247.18714741724
STATISTICS_MINIMUM=0
STATISTICS_STDDEV=37.198102288306
Dimensionen
X: 71575 Y: 70867 Kanäle: 1
Leerwert
*Leerwert nicht gesetzt*
Datentyp
Byte - Acht Bit vorzeichenlose Ganzzahl
Pyramidenübersichten
Räumliches Bezugssystem des Layers
+proj=somerc +lat_0=46.952406 +lon_0=7.4395833
+k_0=1 +x_0=60 +y_0=20 +ellps=bessel
+towgs84=674.4,15.1,405.3,0,0,0,0 +units=m +no_defs
Layerausdehnung (in urspünglicher Projektion des Layers)
0.,-70867. :
71575.,0.
Kanal
Kanal 1
Kanal Nr
1
Keine Statistik
Noch keine Statistik gesammelt



Thanks again if you have any idea what may be wrong with my file or
the above listed raster calc statement.

Andreas

Am 2014-11-17 18:38, schrieb Carlos Cerdán:

Hi Andreas:

I think QGIS raster calculator can make this job. Conditional
syntax
is a little bit... different.  The sentence that can do it is:

(TIFF=249)*255 + (TIFF<249)*TIFF + (TIFF>249)*TIFF

Where TIFF is your raster layer. The trick is: if the sentence in
parentheses is true, it gets value 1, else zero; so we have to
multiply by 255 to replace the 249 values. Next we have to add the
other values.

Good luck,

Carlos Cerdán

PD. Please let me know if i'm wrong with this suggestion

2014-11-17 12:02 GMT-05:00 Andreas Neumann :

Hi,

I have a very simple task (at least I thought it is simple), but am
not able to do it properly.

I have a grayscale tiff value where I would like to replace the
value of 249 with 255 - all other values should stay as they are.

I tried with gdal "nearblack", but nothing changed - I started a
separate email-thread about that at the gdal list.

Then I tried with the QGIS raster calculator - but it does not
support conditional syntax.

I tried with Processing and GRASS - but it would stop at 8% - the
file is quite big.

Finally I came across SAGA "Reclassify with grid value". The
dialogue is very complicated and hard to understand. After a while
it would stop with an error message telling me that Saga may not be
proper

Re: [Qgis-user] TIF/PNG-Image invisible for referencing

[Nicolas Cadieux]

Try exporting it as a tiff or jpg using Gimp.  Make sure you have projection
on the fly activated. Look at the histogram, is there anything there? Try
creating a vector boundary from the raster extent.  Can you see the
boundary?
Good luck
Nicolas



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Re: [Qgis-user] Raster: replace a single value with another value

[G. Allegri]

The problem with SAGA is that it loads eveything in memory to operate, and
I suspect it does it with raster import too.
SAGA works on its internal format, so you could try to convert the tiff to
SAGA format [1] with gdal_translate.

giovanni

[1] http://www.gdal.org/frmt_various.html#SAGA

2014-11-19 9:31 GMT+01:00 Andreas Neumann :

> Hi,
>
> Ok - now I installed a standalone SAGA 2.1.4 (64bit).
>
> I tried to use my bigger tiff file. When importing it I get the following
> message:
> http://webgis.uster.ch/temp/saga_error_message_file_is_abnormally_big.png
>
> My file is 200GB (Packbit compression), ranging between 60'000 and 70'000
> width/height. I don't think this is abnormally big.
>
> Is there another recommended file format besides TIFF that I should
> preferably use with SAGA?
>
> Maybe I should now switch mailing lists and ask this at the SAGA mail list
> ;-)
>
> Thanks,
>
> Andreas
>
> Am 2014-11-18 18:48, schrieb Michael Treglia:
>
>> Andreas,
>>
>> You're running 64bit SAGA, right? (if not sure, click the question
>> mark on the menu bar, and click "About" - should be towards the top).
>>
>> I actually like SAGA because I can throw pretty giant files at it.
>> Just to test out and make sure, I just loaded in a 10GB GeoTIFF with
>> integer values, and did a single value reclass that took about 3
>> minutes. You likely need ample RAM and disk space, but given that you
>> do, it should be feasible. [Watching the system resources, you can see
>> the respective amount of memory get taken up as you work with data in
>> SAGA]
>>
>> The 4GB limit seems like it could be a 32 bit issue.  I was using the
>> latest version of SAGA (2.1.3), 64 bit, downloaded from:
>> http://sourceforge.net/projects/saga-gis/files/SAGA%
>> 20-%202.1/SAGA%202.1.3/
>> [2]
>>
>> If you're really stuck and need to knock this task out of the way - if
>> you can get me the data I can do the reclass for you.
>>
>> hope that helps,
>> mike
>>
>> On Tue, Nov 18, 2014 at 10:04 AM, Andreas Neumann
>>  wrote:
>>
>>  Hi Carlos,
>>>
>>> I reprojected to a different swiss projection system and the
>>> expression still does not work. I tested various projections,
>>> including UTM-32N. Very strange ...
>>>
>>> There clearly seems to be a bug in the raster calculator. I will
>>> open a bug with high priority.
>>>
>>> Thanks for testing and helping!
>>>
>>> Andreas
>>>
>>> Am 2014-11-18 15:36, schrieb Carlos Cerdán:
>>>
>>> Hi Andreas:
>>>
>>> It is solved: you have to reproject your TEMP layer. I've tried
>>> with
>>> UTM-32N zone and raster calculator works fine.
>>>
>>> Why raster calculator (and SAGA) doesn't work with your original
>>> CRS?
>>> Well, I don't know, perhaps devs group have the answer.
>>>
>>> It was a good challenge.
>>>
>>> Carlos
>>>
>>> 2014-11-18 4:37 GMT-05:00 Andreas Neumann :
>>>
>>> Hi Carlos,
>>>
>>> Thank you for your help!
>>>
>>> I tried with
>>>
>>> (TEMP@1=249)*255 + (TEMP@1<249)*TEMP@1 + (TEMP@1>249)*TEMP@1
>>>
>>> My layer is called "temp". However, the resulting file contains all
>>> 0.
>>>
>>> I tried in both QGIS 2.4 and 2.6.
>>>
>>> Is there something wrong with the input file? It was generated from
>>> a PDF with ghostscript. Here is the metadata:
>>>
>>> -
>>>
>>> GDAL provider
>>> GTiff
>>> GeoTIFF
>>> Datensatzbeschreibung
>>> //gis/gis/mapserverdata/uep/release_2014_11/temp.tif
>>> TIFFTAG_DATETIME=2014:11:17 09:50:08
>>> TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch)
>>> TIFFTAG_SOFTWARE=GPL Ghostscript 9.10
>>> TIFFTAG_XRESOLUTION=600
>>> TIFFTAG_YRESOLUTION=600
>>> Kanal 1
>>> STATISTICS_MAXIMUM=255
>>> STATISTICS_MEAN=247.18714741724
>>> STATISTICS_MINIMUM=0
>>> STATISTICS_STDDEV=37.198102288306
>>> Dimensionen
>>> X: 71575 Y: 70867 Kanäle: 1
>>> Leerwert
>>> *Leerwert nicht gesetzt*
>>> Datentyp
>>> Byte - Acht Bit vorzeichenlose Ganzzahl
>>> Pyramidenübersichten
>>> Räumliches Bezugssystem des Layers
>>> +proj=somerc +lat_0=46.952406 +lon_0=7.4395833
>>> +k_0=1 +x_0=60 +y_0=20 +ellps=bessel
>>> +towgs84=674.4,15.1,405.3,0,0,0,0 +units=m +no_defs
>>> Layerausdehnung (in urspünglicher Projektion des Layers)
>>> 0.,-70867. :
>>> 71575.,0.
>>> Kanal
>>> Kanal 1
>>> Kanal Nr
>>> 1
>>> Keine Statistik
>>> Noch keine Statistik gesammelt
>>>
>>> 
>>>
>>> Thanks again if you have any idea what may be wrong with my file or
>>> the above listed raster calc statement.
>>>
>>> Andreas
>>>
>>> Am 2014-11-17 18:38, schrieb Carlos Cerdán:
>>>
>>> Hi Andreas:
>>>
>>> I think QGIS raster calculator can make this job. Conditional
>>> syntax
>>> is a little bit... different.  The sentence that can do it is:
>>>
>>> (TIFF=249)*255 + (TIFF<249)*TIFF + (TIFF>249)*TIFF
>>>
>>> Where TIFF is your raster layer. The trick is: if the sentence in
>>> parentheses is true, it gets value 1, else zero; so we have to
>>> multiply by 255 to replace the 249 values. Next we have to add the
>>> other values.
>>>
>>> Good luck,
>>>
>>

[Qgis-user] Problem with adding parent algorithms in Processing Graphical Modeller

[Järnefelt Jouko]

Hi,

I’m running into problem with Processing Graphical Modeller when I’m trying to 
assign parent algorithms to any algorithm. Every time I do this and click OK to 
return to modeler window I get Python error as described below. Now I’m 
wondering if I should try reinstalling QGIS or do I have problem with python in 
my computer or are some folder settings wrong? Or can someone else confirm this 
kind of problem and should I open a ticket for it? I’m not able to test this in 
any other computer at this time.

I have installed QGIS 2.6 via OSGeo4W64-installer and I’m running on Windows 7 
(64bit). I think I should have installed all dependencies as they should. In 
this computer I have never had QGIS installed before.

An error has occured while executing Python code:
Traceback (most recent call last):
  File 
"C:/OSGEO4~1/apps/qgis/./python/plugins\processing\modeler\ModelerGraphicItem.py",
 line 353, in mousePressEvent
self.action()
  File 
"C:/OSGEO4~1/apps/qgis/./python/plugins\processing\modeler\ModelerGraphicItem.py",
 line 182, in editElement
self.model.updateModelerView()
  File 
"C:/OSGEO4~1/apps/qgis/./python/plugins\processing\modeler\ModelerAlgorithm.py",
 line 464, in updateModelerView
self.modelerdialog.repaintModel()
  File 
"C:/OSGEO4~1/apps/qgis/./python/plugins\processing\modeler\ModelerDialog.py", 
line 345, in repaintModel
self.scene.paintModel(self.alg)
  File 
"C:/OSGEO4~1/apps/qgis/./python/plugins\processing\modeler\ModelerScene.py", 
line 108, in paintModel
arrow = ModelerArrowItem(self.algItems[depend], -1,
KeyError: 'Select by location' << The name of algorithm is varying depending on 
which algorithm I’m trying to assign the parent algorithm.
Python version:
2.7.5 (default, May 15 2013, 22:44:16) [MSC v.1500 64 bit (AMD64)]
QGIS version:
2.6.0-Brighton Brighton, exported

Python path: ['C:/OSGEO4~1/apps/qgis/./python/plugins\\processing', 
'C:/OSGEO4~1/apps/qgis/./python', u'C:/Users/JOUKOJAR/.qgis2/python', 
u'C:/Users/JOUKOJAR/.qgis2/python/plugins', 
'C:/OSGEO4~1/apps/qgis/./python/plugins', 
'C:\\OSGEO4~1\\apps\\Python27\\lib\\site-packages\\matplotlib-1.3.1-py2.7-win-amd64.egg',
 'C:\\OSGEO4~1\\apps\\Python27\\lib\\site-packages\\nose-1.3.3-py2.7.egg', 
'C:\\OSGEO4~1\\apps\\Python27\\lib\\site-packages\\tornado-4.0.1-py2.7-win-amd64.egg',
 
'C:\\OSGEO4~1\\apps\\Python27\\lib\\site-packages\\backports.ssl_match_hostname-3.4.0.2-py2.7.egg',
 
'C:\\OSGEO4~1\\apps\\Python27\\lib\\site-packages\\certifi-14.05.14-py2.7.egg', 
'c:\\osgeo4~1\\apps\\python27\\lib\\site-packages\\python_dateutil-2.1-py2.7.egg',
 'c:\\osgeo4~1\\apps\\python27\\lib\\site-packages\\six-1.3.0-py2.7.egg', 
'C:\\OSGEO4~1\\apps\\orfeotoolbox\\python', 'C:\\OSGEO4~1\\bin', 
'C:\\OSGEO4~1\\bin\\python27.zip', 'C:\\OSGEO4~1\\apps\\Python27\\DLLs', 
'C:\\OSGEO4~1\\apps\\Python27\\lib', 
'C:\\OSGEO4~1\\apps\\Python27\\lib\\plat-win', 
'C:\\OSGEO4~1\\apps\\Python27\\lib\\lib-tk', 'C:\\OSGEO4~1\\apps\\Python27', 
'C:\\OSGEO4~1\\apps\\Python27\\lib\\site-packages', 
'C:\\OSGEO4~1\\apps\\Python27\\lib\\site-packages\\PIL', 
'C:\\OSGEO4~1\\apps\\Python27\\lib\\site-packages\\jinja2-2.7.2-py2.7.egg', 
'C:\\OSGEO4~1\\apps\\Python27\\lib\\site-packages\\markupsafe-0.23-py2.7-win-amd64.egg',
 'C:\\OSGEO4~1\\apps\\Python27\\lib\\site-packages\\pytz-2012j-py2.7.egg', 
'C:\\OSGEO4~1\\apps\\Python27\\lib\\site-packages\\win32', 
'C:\\OSGEO4~1\\apps\\Python27\\lib\\site-packages\\win32\\lib', 
'C:\\OSGEO4~1\\apps\\Python27\\lib\\site-packages\\Pythonwin', 
'C:\\OSGEO4~1\\apps\\Python27\\lib\\site-packages\\Shapely-1.2.18-py2.7-win-amd64.egg',
 'C:\\OSGEO4~1\\apps\\Python27\\lib\\site-packages\\wx-2.8-msw-unicode', 
'C:\\OSGEO4~1\\apps\\Python27\\lib\\site-packages\\xlrd-0.9.2-py2.7.egg', 
'C:\\OSGEO4~1\\apps\\Python27\\lib\\site-packages\\xlwt-0.7.5-py2.7.egg', 
'C:\\Users\\JOUKOJAR\\.qgis2\\python\\plugins\\MetaSearch\\ext-libs', 
'C:\\Users\\JOUKOJAR\\.qgis2\\python\\plugins\\mmqgis/forms', 
'C:\\OSGEO4~1\\apps\\qgis\\python\\plugins\\fTools\\tools']

Thanks to all who will reply!
Jouko

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Re: [Qgis-user] Exporting Fine-Scale Map with Open Layers Imagery

[Jonathan Moules]

Hi Mike,
I’d suggest this is probably worth filing a bug report with, ideally if 
possible including your Workspace and data.
Cheers,
Jonathan

From: qgis-user-boun...@lists.osgeo.org 
[mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of Michael Treglia
Sent: Monday, November 17, 2014 1:47 AM
To: qgis-user@lists.osgeo.org
Subject: [Qgis-user] Exporting Fine-Scale Map with Open Layers Imagery

Hi All,

I was trying to export a fine-scale map (total extent ~75m x 75m) that had 
Google Satellite layer from the OpenLayers plugin. It took a bit to render in 
the map viewer and print composer, but wasn't unreasonable.
However... At that resolution, I haven't been able to export the map from the 
print composer in any way (exporting to PDF, image, or Printing to PDF). Is 
there a known limitation I'm missing on this front? (The map in the Composer 
window just disappears while it processes, but it never seems to finish).
I'm running QGIS 2.6 64bit on Windows 7. And for what it's worth, the system 
resources aren't at their limits at all during this either.

Thanks!
Mike


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Re: [Qgis-user] Exporting Fine-Scale Map with Open Layers Imagery

[Nicolas Cadieux]

Limits, I believe are on the server side.  Zoom in then use the 
"project/save as image" function and use the images as layer in the 
project.  If you want a higher resolution, look for "command line options" 
on the online manual and you will have the option of saving with a higher 
resolution.  Don't go over the servers limits... 
Nicolas Cadieux M.Sc. 
Les Entreprises Archéotec inc.  
8548, rue Saint-Denis Montréal H2P 2H2 
Téléphone: 514.381.5112  Fax: 514.381.4995 
Le 2014-11-19 12:48, "Jonathan Moules-3 [via OSGeo.org]" 
 a écrit : 









Hi Mike, 
I’d suggest this is probably worth filing a bug report with, ideally if 
possible including your Workspace and data. 
Cheers, 
Jonathan 
  
From: [hidden email]  [mailto: [hidden email] ]
On Behalf Of Michael Treglia 
Sent: Monday, November 17, 2014 1:47 AM 
To: [hidden email] 
Subject: [Qgis-user] Exporting Fine-Scale Map with Open Layers Imagery 
  



Hi All, 

I was trying to export a fine-scale map (total extent ~75m x 75m) that had 
Google Satellite layer from the OpenLayers plugin. It took a bit to render in 
the map viewer and print composer, but wasn't unreasonable. 

However... At that resolution, I haven't been able to export the map from 
the print composer in any way (exporting to PDF, image, or Printing to PDF). Is 
there a known limitation I'm missing on this front? (The
 map in the Composer window just disappears while it processes, but it never 
seems to finish). 


I'm running QGIS 2.6 64bit on Windows 7. And for what it's worth, the 
system resources aren't at their limits at all during this either. 


  

Thanks! 
Mike 

  
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Click 
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legal commitments. Disclosure to parties
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unauthorised disclosures nor reliance upon them.

If you have received this message in error please advise us immediately and 
destroy all copies of it.


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[Qgis-user] zoom to selection in 2.6

[Jake Maier]

Can someone please confirm that the zoom to selection in qgis 2.6 still
zooms only to the first item in the selection

Thanks

Jake

 

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[Qgis-user] QGIS 2.6 installation

[PadmaDevi.Subramaniam]

Hi Users,

Can you please confirm whether QGIS 2.6 can be installed in windows 32 bit OS 
with 4 GB RAM?

Regards,
Padma Devi
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Re: [Qgis-user] QGIS 2.6 installation

[Brent Wood]

See: [Qgis-user] Why can I not find system requirements of QGIS
|   |
|   |   |   |   |   |
| [Qgis-user] Why can I not find system requirements of QGIS[Qgis-user] Why can 
I not find system requirements of QGIS Jonathan Moules jonathanmoules at 
warwickshire.gov.uk Fri Sep 7 04:11:36 PDT 2012  |
|  |
| View on lists.osgeo.org | Preview by Yahoo |
|  |
|   |

  so if you download the 32bit installer you should be fine with 4Gb.
I have run QGIS 2.6 on Linux on laptops with 2Gb memory quite easily. One test 
I tried was memory efficiency - a 200Mb shapefile loaded into QGIS raised QGIS 
memory use by 100Mb, about 1/2 the on disk data size. Another Open Source 
application I was trialling used 400Mb to do the same thing. 

Brent Wood
  From: "padmadevi.subraman...@cognizant.com" 

 To: qgis-user@lists.osgeo.org 
 Sent: Thursday, November 20, 2014 8:08 PM
 Subject: [Qgis-user] QGIS 2.6 installation
   
 Hi Users,    Can you please confirm whether QGIS 2.6 can be installed in 
windows 32 bit OS with 4 GB RAM?    Regards, Padma Devi This e-mail and any 
files transmitted with it are for the sole use of the intended recipient(s) and 
may contain confidential and privileged information. If you are not the 
intended recipient(s), please reply to the sender and destroy all copies of the 
original message. Any unauthorized review, use, disclosure, dissemination, 
forwarding, printing or copying of this email, and/or any action taken in 
reliance on the contents of this e-mail is strictly prohibited and may be 
unlawful. Where permitted by applicable law, this e-mail and other e-mail 
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Re: [Qgis-user] QGIS 2.6 installation

[PadmaDevi.Subramaniam]

Thanks Brent.

We installed QGIS 2.6 using standalone installer in windows OS, 32 bit with 4GB 
RAM.
We are facing the below issue when Dissolving Vector layers using Grass 
commands.
The processing log shows the below error,

|Could not load model watersheds.model|Error in algorithm name: 
saga:catchmentareaparallel
ALGORITHM

The below error occurs while using Grass commands to dissolve vector layers,
Oooops! The following output layers could not be open
· Dissolved layer: 
C:\Users\169099\AppData\Local\Temp\processing\5b5419e238924b5d87fc1e74254dec5b\output.shp
The above files could not be opened, which probably indicates that they were 
not correctly produced by the executed algorithm
Checking the log information might help you see why those layers were not 
created as expected
This algorithm requires GRASS to be run. A test to check if GRASS is correctly 
installed and configured in your system has been performed, with the following 
result:
GRASS seems to be correctly installed and configured

Can anyone please help us in resolving the above issue?

Regards,
Padma Devi


From: Brent Wood [mailto:pcr...@pcreso.com]
Sent: Thursday, November 20, 2014 12:52 PM
To: Subramaniam, Padma Devi (Cognizant); qgis-user@lists.osgeo.org
Subject: Re: [Qgis-user] QGIS 2.6 installation

See:
[Qgis-user] Why can I not find system requirements of 
QGIS












[Qgis-user] Why can I not find system requirements of 
QGIS
[Qgis-user] Why can I not find system requirements of QGIS Jonathan Moules 
jonathanmoules at warwickshire.gov.uk Fri Sep 7 04:11:36 PDT 2012


View on 
lists.osgeo.org

Preview by Yahoo






so if you download the 32bit installer you should be fine with 4Gb.

I have run QGIS 2.6 on Linux on laptops with 2Gb memory quite easily. One test 
I tried was memory efficiency - a 200Mb shapefile loaded into QGIS raised QGIS 
memory use by 100Mb, about 1/2 the on disk data size. Another Open Source 
application I was trialling used 400Mb to do the same thing.

Brent Wood


From: "padmadevi.subraman...@cognizant.com" 

To: qgis-user@lists.osgeo.org
Sent: Thursday, November 20, 2014 8:08 PM
Subject: [Qgis-user] QGIS 2.6 installation

Hi Users,

Can you please confirm whether QGIS 2.6 can be installed in windows 32 bit OS 
with 4 GB RAM?

Regards,
Padma Devi
This e-mail and any files transmitted with it are for the sole use of the 
intended recipient(s) and may contain confidential and privileged information. 
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and other e-mail communications sent to and from Cognizant e-mail addresses may 
be monitored.

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Re: [Qgis-user] QGIS 2.6 installation

[Brent Wood]

Something looks confused here. The first error is from trying to execute a SAGA 
gis command, not GRASS gis. Looks like GRASS may then be failing to load the 
file which should have been generated by SAGA. If you can resolve this error, 
the GRASS one may go away too.
|Could not load model watersheds.model|Error in algorithm name: 
saga:catchmentareaparallel ALGORITHM
If you are not, you might try running it with the Python console open?

Brent Wood
  From: "padmadevi.subraman...@cognizant.com" 

 To: pcr...@pcreso.com 
Cc: qgis-user@lists.osgeo.org 
 Sent: Thursday, November 20, 2014 8:26 PM
 Subject: RE: [Qgis-user] QGIS 2.6 installation
   
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{margin-bottom:0in;}#yiv1466261196 Thanks Brent.    We installed QGIS 2.6 using 
standalone installer in windows OS, 32 bit with 4GB RAM. We are facing the 
below issue when Dissolving Vector layers using Grass commands. The processing 
log shows the below error,    |Could not load model watersheds.model|Error in 
algorithm name: saga:catchmentareaparallel ALGORITHM    The below error occurs 
while using Grass commands to dissolve vector layers, Oooops! The following 
output layers could not be open ·Dissolved layer: 
C:\Users\169099\AppData\Local\Temp\processing\5b5419e238924b5d87fc1e74254dec5b\output.shp
 The above files could not be opened, which probably indicates that they were 
not correctly produced by the executed algorithm Checking the log information 
might help you see why those layers were not created as expected This algorithm 
requires GRASS to be run. A test to check if GRASS is correctly installed and 
configured in your system has been performed, with the following r