Re: [Qgis-user] Extract raster cell-value statistics (min, max, count, sum) within a polygone

[Johan Nilsson]

Thanx Micha Silver :)
Worked now after setting region S and W and also change resolution to what
the raster had. :)



2015-04-29 18:44 GMT+02:00 Micha Silver :

>
>
> On 04/29/2015 03:15 PM, Johan Nilsson wrote:
>
>  Have now tried to run v.rast.stats in Grass 7.0. It start and run 100%
> off one core in hours, until a file in ~/grassdata/location/PERMANENT/.tmp/
> inflate to the disk is full, approximate 150GB :(
>
>   Whoa!
> Check the region settings before you try again:
> g.region -p
> This is FAQ #0 for all work with GRASS. The v.rast.stats module works by
> first rasterizing the vector polygons into a temporary raster. If you
> region is very large, and resolution setting is very small, you might be
> getting a huge temporary raster.
>
>
>  Have made topology check on the vector-data and imported it to grassdb.
> Will see if I can collect usefull data and ask on grass-user list.
>
>  Stupid Ubuntu 14.04  to not messure invisible files in the normal
> file-manager, had gone faster to pinpoint the problem.
>
>  /Cheers
>
> 2015-04-19 18:54 GMT+02:00 Micha Silver :
>
>>
>>
>> On 04/19/2015 12:34 PM, Johan Nilsson wrote:
>>
>>  Zonal statistics work well to extract, numers of cells(counts) , sum of
>> the value (sum)  and also average (mean) But I want the minimum AND
>> max-value and also standard error, if possible. Is there another plugin or
>> a tutorial how it may bee done in another way.
>>
>>The GRASS module v.rast.stats does what you want. But it's not in the
>> Processing toolbox. You can import your raster into a GRASS mapset then do
>> the analysis directly within GRASS.
>>
>>  The code to Zonal statistics are here, but I'm total lost in how it
>> work.
>>
>>
>> https://github.com/qgis/QGIS/blob/a2f51260db5357917e86b78f1bb2915379d670dd/src/analysis/vector/qgszonalstatistics.cpp
>>
>>  /Cheers
>>
>>  This mail was received via Mail-SeCure System.
>>
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Re: [Qgis-user] Extract raster cell-value statistics (min, max, count, sum) within a polygone

[Johan Nilsson]

Ok. Thanks. Seems like g.region is from equator and greenwich, south 0 and
west 0.

2015-04-29 18:44 GMT+02:00 Micha Silver :

>
>
> On 04/29/2015 03:15 PM, Johan Nilsson wrote:
>
>  Have now tried to run v.rast.stats in Grass 7.0. It start and run 100%
> off one core in hours, until a file in ~/grassdata/location/PERMANENT/.tmp/
> inflate to the disk is full, approximate 150GB :(
>
>   Whoa!
> Check the region settings before you try again:
> g.region -p
> This is FAQ #0 for all work with GRASS. The v.rast.stats module works by
> first rasterizing the vector polygons into a temporary raster. If you
> region is very large, and resolution setting is very small, you might be
> getting a huge temporary raster.
>
>
>  Have made topology check on the vector-data and imported it to grassdb.
> Will see if I can collect usefull data and ask on grass-user list.
>
>  Stupid Ubuntu 14.04  to not messure invisible files in the normal
> file-manager, had gone faster to pinpoint the problem.
>
>  /Cheers
>
> 2015-04-19 18:54 GMT+02:00 Micha Silver :
>
>>
>>
>> On 04/19/2015 12:34 PM, Johan Nilsson wrote:
>>
>>  Zonal statistics work well to extract, numers of cells(counts) , sum of
>> the value (sum)  and also average (mean) But I want the minimum AND
>> max-value and also standard error, if possible. Is there another plugin or
>> a tutorial how it may bee done in another way.
>>
>>The GRASS module v.rast.stats does what you want. But it's not in the
>> Processing toolbox. You can import your raster into a GRASS mapset then do
>> the analysis directly within GRASS.
>>
>>  The code to Zonal statistics are here, but I'm total lost in how it
>> work.
>>
>>
>> https://github.com/qgis/QGIS/blob/a2f51260db5357917e86b78f1bb2915379d670dd/src/analysis/vector/qgszonalstatistics.cpp
>>
>>  /Cheers
>>
>>  This mail was received via Mail-SeCure System.
>>
>>
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Re: [Qgis-user] Extract raster cell-value statistics (min, max, count, sum) within a polygone

[Micha Silver]

  
  


On 04/29/2015 03:15 PM, Johan Nilsson
  wrote:


  

  Have now tried to run v.rast.stats in Grass 7.0. It start
and run 100% off one core in hours, until a file in
~/grassdata/location/PERMANENT/.tmp/ inflate to the disk is
full, approximate 150GB :(

  

  

Whoa!
Check the region settings before you try again:
g.region -p
This is FAQ #0 for all work with GRASS. The v.rast.stats module
works by first rasterizing the vector polygons into a temporary
raster. If you region is very large, and resolution setting is very
small, you might be getting a huge temporary raster.
 

  
Have made topology check on the vector-data and imported it
  to grassdb. Will see if I can collect usefull data and ask on
  grass-user list.
  

Stupid Ubuntu 14.04  to not messure invisible files in the
  normal file-manager, had gone faster to pinpoint the problem.
  



/Cheers
  
  
2015-04-19 18:54 GMT+02:00 Micha Silver
  :
  
 

On 04/19/2015 12:34 PM, Johan Nilsson wrote:


  

  Zonal statistics work well to extract, numers
of cells(counts) , sum of the value (sum)  and
also average (mean) But I want the minimum AND
max-value and also standard error, if possible.
Is there another plugin or a tutorial how it may
bee done in another way.

  

  

   The GRASS module v.rast.stats does what you want.
  But it's not in the Processing toolbox. You can import
  your raster into a GRASS mapset then do the analysis
  directly within GRASS.
  
  
The code to Zonal statistics are here, but I'm
  total lost in how it work.
  
  https://github.com/qgis/QGIS/blob/a2f51260db5357917e86b78f1bb2915379d670dd/src/analysis/vector/qgszonalstatistics.cpp
  

/Cheers
  
  
 This mail was received via Mail-SeCure System.



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Re: [Qgis-user] Extract raster cell-value statistics (min, max, count, sum) within a polygone

[Johan Nilsson]

Have now tried to run v.rast.stats in Grass 7.0. It start and run 100% off
one core in hours, until a file in ~/grassdata/location/PERMANENT/.tmp/
inflate to the disk is full, approximate 150GB :(

Have made topology check on the vector-data and imported it to grassdb.
Will see if I can collect usefull data and ask on grass-user list.

Stupid Ubuntu 14.04  to not messure invisible files in the normal
file-manager, had gone faster to pinpoint the problem.

/Cheers

2015-04-19 18:54 GMT+02:00 Micha Silver :

>
>
> On 04/19/2015 12:34 PM, Johan Nilsson wrote:
>
>  Zonal statistics work well to extract, numers of cells(counts) , sum of
> the value (sum)  and also average (mean) But I want the minimum AND
> max-value and also standard error, if possible. Is there another plugin or
> a tutorial how it may bee done in another way.
>
>   The GRASS module v.rast.stats does what you want. But it's not in the
> Processing toolbox. You can import your raster into a GRASS mapset then do
> the analysis directly within GRASS.
>
>  The code to Zonal statistics are here, but I'm total lost in how it work.
>
>
> https://github.com/qgis/QGIS/blob/a2f51260db5357917e86b78f1bb2915379d670dd/src/analysis/vector/qgszonalstatistics.cpp
>
>  /Cheers
>
> This mail was received via Mail-SeCure System.
>
>
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Re: [Qgis-user] Extract raster cell-value statistics (min, max, count, sum) within a polygone

[Jürgen E . Fischer]

Hi Johan,

On Sat, 25. Apr 2015 at 16:16:54 +0200, Johan Nilsson wrote:
> 2015-04-22 18:12 GMT+02:00 Jürgen E. :
> > On Wed, 22. Apr 2015 at 14:25:32 +0200, Johan Nilsson wrote:
> > > Asked for advice to install nightly build on
> > > http://lists.osgeo.org/mailman/options/ubuntu, because can't find
> > > anything on google, to install nighly build, only on precise (12.04) not
> > > on trusty (14.04)

> > See http://qgis.org/de/site/forusers/alldownloads.html#debian-ubuntu

> > So you probably want to add

> > deb http://qgis.org/debian-nightly trusty main

> Jurgen E. Are you sure? I have ubuntugis-unstable installed and are afraid
> there going to depenency problems if i install debian-nightly?

Didn't you ask for a nightly build for trusty (w/o mentioning ubuntugis)?

If you want a nightly build with ubuntugis dependencies you need
http://qgis.org/ubuntugis-nightly instead of http://qgis.org/debian-nightly.
Also described on the page above.


Jürgen

-- 
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Dipl.-Inf. (FH) Rheinstraße 13  Fax. +49-4931-918175-50
Software Engineer   D-26506 Norden http://www.norbit.de
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Re: [Qgis-user] Extract raster cell-value statistics (min, max, count, sum) within a polygone

[Johan Nilsson]

Jurgen E. Are you sure? I have ubuntugis-unstable installed and are afraid
there going to depenency problems if i install debian-nightly?

2015-04-22 18:12 GMT+02:00 Jürgen E. :

> Hi Johan,
>
> On Wed, 22. Apr 2015 at 14:25:32 +0200, Johan Nilsson wrote:
> > Hi. Nyall.
> > Asked for advice to install nightly build on
> > http://lists.osgeo.org/mailman/options/ubuntu, because can't find
> anything
> > on google, to install nighly build, only on precise (12.04) not on trusty
> > (14.04)
>
> See http://qgis.org/de/site/forusers/alldownloads.html#debian-ubuntu
>
> So you probably want to add
>
> deb http://qgis.org/debian-nightly trusty main
>
> to your /etc/apt/sources.list and do
>
> apt-get update && apt-get install qgis
>
> as root to install qgis.
>
>
> Jürgen
>
> --
> Jürgen E. Fischer   norBIT GmbH Tel.
> +49-4931-918175-31
> Dipl.-Inf. (FH) Rheinstraße 13  Fax.
> +49-4931-918175-50
> Software Engineer   D-26506 Norden
> http://www.norbit.de
> QGIS release manager (PSC)  GermanyIRC: jef on FreeNode
>
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Re: [Qgis-user] Extract raster cell-value statistics (min, max, count, sum) within a polygone

[Jürgen E . Fischer]

Hi Johan,

On Wed, 22. Apr 2015 at 14:25:32 +0200, Johan Nilsson wrote:
> Hi. Nyall.
> Asked for advice to install nightly build on
> http://lists.osgeo.org/mailman/options/ubuntu, because can't find anything
> on google, to install nighly build, only on precise (12.04) not on trusty
> (14.04)

See http://qgis.org/de/site/forusers/alldownloads.html#debian-ubuntu

So you probably want to add

deb http://qgis.org/debian-nightly trusty main

to your /etc/apt/sources.list and do

apt-get update && apt-get install qgis

as root to install qgis.


Jürgen

-- 
Jürgen E. Fischer   norBIT GmbH Tel. +49-4931-918175-31
Dipl.-Inf. (FH) Rheinstraße 13  Fax. +49-4931-918175-50
Software Engineer   D-26506 Norden http://www.norbit.de
QGIS release manager (PSC)  GermanyIRC: jef on FreeNode 



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Re: [Qgis-user] Extract raster cell-value statistics (min, max, count, sum) within a polygone

[Johan Nilsson]

Hi. Nyall.
Asked for advice to install nightly build on
http://lists.osgeo.org/mailman/options/ubuntu, because can't find anything
on google, to install nighly build, only on precise (12.04) not on trusty
(14.04)

2015-04-21 0:38 GMT+02:00 Nyall Dawson :

> On 19 April 2015 at 19:34, Johan Nilsson  wrote:
> > Zonal statistics work well to extract, numers of cells(counts) , sum of
> the
> > value (sum)  and also average (mean) But I want the minimum AND max-value
> > and also standard error, if possible. Is there another plugin or a
> tutorial
> > how it may bee done in another way.
> >
>
> Try updating to a nightly development version of QGIS. A bunch of
> extra stats were just added yesterday to zonal stats, including min,
> max, median, stdev, etc. [1]
>
> Nyall
>
> [1]
> https://github.com/qgis/QGIS/commit/ee7b4d2539337f937aec9efae9ad603f8e2014ff
>
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Re: [Qgis-user] Extract raster cell-value statistics (min, max, count, sum) within a polygone

[Nyall Dawson]

On 19 April 2015 at 19:34, Johan Nilsson  wrote:
> Zonal statistics work well to extract, numers of cells(counts) , sum of the
> value (sum)  and also average (mean) But I want the minimum AND max-value
> and also standard error, if possible. Is there another plugin or a tutorial
> how it may bee done in another way.
>

Try updating to a nightly development version of QGIS. A bunch of
extra stats were just added yesterday to zonal stats, including min,
max, median, stdev, etc. [1]

Nyall

[1] https://github.com/qgis/QGIS/commit/ee7b4d2539337f937aec9efae9ad603f8e2014ff
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Re: [Qgis-user] Extract raster cell-value statistics (min, max, count, sum) within a polygone

[Michael Treglia]

Hi Johan.

I've re-added the QGIS-User list to this, as I'm primarily on Windows. Just
upgraded to QGIS 2.8.1 no a virtual machine with ubuntu 14.04, and also
didn't get SAGA or GRASS installed immediately, and don't have time right
now to figure it out.  (I imagine others on the list can help you with the
saga/grass install issues)

As a quick work-around, you should be able to just install SAGA via the
tarball here:
http://sourceforge.net/projects/saga-gis/files/SAGA%20-%202.1/SAGA%202.1.4/
[or just sudo apt-get install saga seems to work too].  At least on
windows, you can just drag files into SAGA and work with them there, and
then work with the respective modules, so hopefully that is the same on
Ubuntu.

An alternative is working with R, using the 'extract' function in the
'raster' package (see the documentation here:
http://cran.r-project.org/web/packages/raster/index.html; and a good intro
to spatial data with R is available here:
http://science.nature.nps.gov/im/datamgmt/statistics/r/advanced/spatial.cfm)

Sorry I can't be more help - good luck.
Cheers,
Mike

On Mon, Apr 20, 2015 at 9:12 AM, Johan Nilsson  wrote:

> Can't find Saga or Grass tools on Ubuntu 14.04 with
> http://ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu
>
> Maybe down grade to stable? For a couple of years ago unstable was stable,
> but now with Grass 7.0 and i don't know how it is with SAGA, but I can not
> find it. Maybe It is why Processing --> Zonal Statistics do not work
> because it depend on Grass 6.4 or Saga? When i run processing --> zonal
> statistics noting happens but say I shoukld check the log, but the
> log-window does not show anything.
>
> 2015-04-20 2:23 GMT+02:00 Michael Treglia :
>
>> Also, theres a utility in SAGA, implemented within the Processing
>> toolbox. See SAGA -> Shapes - Grid -> Grid statistics for polygons
>>
>> Lets you calculate:
>> * Number of Cells
>> * Minimum
>> * Maximum
>> * Range
>> * Sum
>> * Mean
>> * Variance
>> * Standard Deviation
>> * Specified Quartiles
>>
>> Hope that helps,
>> mike
>>
>> On Sun, Apr 19, 2015 at 11:54 AM, Micha Silver  wrote:
>>
>>>
>>>
>>> On 04/19/2015 12:34 PM, Johan Nilsson wrote:
>>>
>>>  Zonal statistics work well to extract, numers of cells(counts) , sum
>>> of the value (sum)  and also average (mean) But I want the minimum AND
>>> max-value and also standard error, if possible. Is there another plugin or
>>> a tutorial how it may bee done in another way.
>>>
>>>   The GRASS module v.rast.stats does what you want. But it's not in the
>>> Processing toolbox. You can import your raster into a GRASS mapset then do
>>> the analysis directly within GRASS.
>>>
>>>  The code to Zonal statistics are here, but I'm total lost in how it
>>> work.
>>>
>>>
>>> https://github.com/qgis/QGIS/blob/a2f51260db5357917e86b78f1bb2915379d670dd/src/analysis/vector/qgszonalstatistics.cpp
>>>
>>>  /Cheers
>>>
>>> This mail was received via Mail-SeCure System.
>>>
>>>
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>>
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Re: [Qgis-user] Extract raster cell-value statistics (min, max, count, sum) within a polygone

[Michael Treglia]

Also, theres a utility in SAGA, implemented within the Processing toolbox.
See SAGA -> Shapes - Grid -> Grid statistics for polygons

Lets you calculate:
* Number of Cells
* Minimum
* Maximum
* Range
* Sum
* Mean
* Variance
* Standard Deviation
* Specified Quartiles

Hope that helps,
mike

On Sun, Apr 19, 2015 at 11:54 AM, Micha Silver  wrote:

>
>
> On 04/19/2015 12:34 PM, Johan Nilsson wrote:
>
>  Zonal statistics work well to extract, numers of cells(counts) , sum of
> the value (sum)  and also average (mean) But I want the minimum AND
> max-value and also standard error, if possible. Is there another plugin or
> a tutorial how it may bee done in another way.
>
>   The GRASS module v.rast.stats does what you want. But it's not in the
> Processing toolbox. You can import your raster into a GRASS mapset then do
> the analysis directly within GRASS.
>
>  The code to Zonal statistics are here, but I'm total lost in how it work.
>
>
> https://github.com/qgis/QGIS/blob/a2f51260db5357917e86b78f1bb2915379d670dd/src/analysis/vector/qgszonalstatistics.cpp
>
>  /Cheers
>
> This mail was received via Mail-SeCure System.
>
>
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Re: [Qgis-user] Extract raster cell-value statistics (min, max, count, sum) within a polygone

[Micha Silver]

  
  


On 04/19/2015 12:34 PM, Johan Nilsson
  wrote:


  

  Zonal statistics work well to extract, numers of
cells(counts) , sum of the value (sum)  and also average
(mean) But I want the minimum AND max-value and also
standard error, if possible. Is there another plugin or a
tutorial how it may bee done in another way.

  

  

The GRASS module v.rast.stats does what you want. But it's not in
the Processing toolbox. You can import your raster into a GRASS
mapset then do the analysis directly within GRASS.

  
The code to Zonal statistics are here, but I'm total lost
  in how it work.
  
  https://github.com/qgis/QGIS/blob/a2f51260db5357917e86b78f1bb2915379d670dd/src/analysis/vector/qgszonalstatistics.cpp
  

/Cheers
  
  
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Re: [Qgis-user] Extract raster cell-value statistics (min, max, count, sum) within a polygone

[Alexander Bruy]

Hi Johan,

try Zonal Statistics from Processing

2015-04-19 12:34 GMT+03:00 Johan Nilsson :
> Zonal statistics work well to extract, numers of cells(counts) , sum of the
> value (sum)  and also average (mean) But I want the minimum AND max-value
> and also standard error, if possible. Is there another plugin or a tutorial
> how it may bee done in another way.
>
> The code to Zonal statistics are here, but I'm total lost in how it work.
>
> https://github.com/qgis/QGIS/blob/a2f51260db5357917e86b78f1bb2915379d670dd/src/analysis/vector/qgszonalstatistics.cpp
>
> /Cheers
>
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[Qgis-user] Extract raster cell-value statistics (min, max, count, sum) within a polygone

[Johan Nilsson]

Zonal statistics work well to extract, numers of cells(counts) , sum of the
value (sum)  and also average (mean) But I want the minimum AND max-value
and also standard error, if possible. Is there another plugin or a tutorial
how it may bee done in another way.

The code to Zonal statistics are here, but I'm total lost in how it work.

https://github.com/qgis/QGIS/blob/a2f51260db5357917e86b78f1bb2915379d670dd/src/analysis/vector/qgszonalstatistics.cpp

/Cheers
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