[Qgis-user] GRASS7 r.water.outlet returns error in QGIS 2.14.2

Sun May 8 13:13:08 PDT 2016

If you replace those 2 lines with this line:
ParameterString|coordinates|Coordinates of outlet point|0,0

and restart QGIS you should be able to run the tool.

On Sun, May 8, 2016 at 12:22 PM, Guillaume.Katarn <
guillaume.katarn at gmail.com> wrote:

> Indeed it seems that the problem comes from a mixup between GRASS 6.4 and
> GRASS 7 in the Processing setup according to the requested inputs. Do you
> know a way to correct it or its depends on an update from the developers?
>
> I will try to do it directly in GRASS as you recommended.
>
>
> Thank you for you answer.
>
>
> 2016-05-08 11:37 GMT+02:00 Micha Silver [via OSGeo.org] <[hidden email]
> <http:///user/SendEmail.jtp?type=node&node=5265247&i=0>>:
>
>>
>> I can see two problems in the error output  below:
>>
>> On 07/05/2016 12:38, Guillaume.Katarn wrote:
>> ------ Original Message ------
>> Subject: [Qgis-user] GRASS7 r.water.outlet returns error in QGIS 2.14.2
>> Date: Sat, 7 May 2016 02:38:08 -0700 (PDT)
>> To: Qgis-user
>> From: Guillaume Katarn
>>
>> Hello everyone,
>>
>> I am a new user of GIS software and I am currently facing an issue with the
>> GRASS7 tool r.water.outlet. I precise that I am beginning with both Linux
>> and GIS. I use Ubuntu 14.04 with QGIS 2.14.2 and GRASS7.0.3.
>>
>> I downloaded and installed the software by following the instructions of the
>> official QGIS webpage:
>>
>> www.qgis.org/en/site/forusers/alldownloads.html
>>
>> I use GRASS7 r.watershed to create a "Drainage" raster that I use as an
>> input for r.water.outlet. The second input is coordinate of vectorial points
>> I want to delineate my basins (it could be even better if I could use
>> several points to do so because I need 5 different basins).
>>
>> This is my r.water.outlet interface:
>> <http://osgeo-org.1560.x6.nabble.com/file/n5265113/fen%C3%AAtre_remplie.png> <http://osgeo-org.1560.x6.nabble.com/file/n5265113/fen%C3%AAtre_remplie.png>
>>
>> First things I noticed: I can't enter decimal numbers, so I lose accuracy
>> regarding to my points, and the interface is different from the one in the
>> second image for the tool r.water.outlet regarding the inputs for my version
>> of QGIS.
>> <http://osgeo-org.1560.x6.nabble.com/file/n5265113/g.png> <http://osgeo-org.1560.x6.nabble.com/file/n5265113/g.png>
>>
>> Then when I run the process (In my QGIS 2.14.2, the processing plugin
>> version is 2.12.2), I obtain the log:
>>
>> [code]Démarrage de l'algorithme r.water.outlet - Watershed basin creation
>> program. ... g.proj -c proj4="+proj=lcc +lat_1=44.1 +lat_0=44.1
>> +lon_0=2.337229166666667 +k_0=0.999877499 +x_0=600000 +y_0=3200000
>> +a=6378249.2 +b=6356514.999904194 +units=m +no_defs" r.external
>> input="/home/kyle/Bureau/ERM/Data_ERM/GISProjectFolder/Rasters/Drainage_Direction_Watershed.tif"
>> band=1 output=tmp1462467882073 --overwrite -o g.region -a n=1959000.0
>> s=1843500.0 e=1038600.0 w=923100.0 res=300 r.water.outlet
>> input=tmp1462467882073 easting="989927" northing="1891138"
>> output=output881924edb38d42189f35bcf5166a0da3 --overwrite g.region
>> raster=output881924edb38d42189f35bcf5166a0da3 r.out.gdal -c
>> createopt="TFW=YES,COMPRESS=LZW"
>> input=output881924edb38d42189f35bcf5166a0da3
>> output="/home/kyle/Bureau/ERM/Data_ERM/GISProjectFolder/test_water_outlet.tif"
>> DÃ©marrage du SIG GRASS ... ExÃ©cution de
>> '/home/kyle/.qgis2//processing/grass7_batch_job.sh' ... ATTENTION: Datum non
>> reconnu par GRASS et aucuns paramÃ¨tres trouvÃ©s Default region was updated
>> to the new projection, but if you have multiple mapsets g.region -d should
>> be run in each to update the region from the default Projection information
>> updated ATTENTION: Datum non reconnu par GRASS et aucuns paramÃ¨tres
>> trouvÃ©s ATTENTION: Over-riding projection check Reading band 1 of 1...
>>
>>
>> Here you are importing a raster "Drainage_Direction_Watershed.tif", but
>> it seems that the tif file dows not have a proper coordinate system
>> definition. New users often get tripped by this. In GRASS you should always
>> use input data with the coordinate system correctly defined.
>>
>>
>> r.external terminÃ©. Link to raster map created. Description: Creates
>> watershed basins from a drainage direction map. Keywords: raster, hydrology,
>> watershed Usage: r.water.outlet input=name output=name
>> coordinates=east,north [--overwrite] [--help] [--verbose] [--quiet] [--ui]
>>
>>
>> Here's the real problem. In The new version of r.water.outlet you specify
>> the input coordinates as:
>> coordinates=<east>,<north>
>> But above in the command created by the processing interface if has
>> created the command with the old format:
>> easting=<...> northing=<...>
>> Maybe there is still some mixup between GRASS 6.4 and GRASS 7 in the
>> Processing setup??
>>
>> You will be able to easily overcome this if you switch to GRASS and enter
>> the commands yourself.
>>
>> Additionally, I would point out that there's a nice set of GRASS addons:
>> r.stream.* that offer extended capabilities for watershed analysis. For
>> example the addon module r.stream.basins can take a point vector map as
>> input drainage points. THen you get basins for all the drainage points in
>> one go.
>>
>> Flags: --o Autoriser la sortie Ã Ã©craser les fichiers existants --h
>> Afficher le rÃ©sumÃ© d'utilisation --v Sortie du module en mode bavard --q
>> Sortie du module en mode silence --ui Force launching GUI dialog Parameters:
>> input Name of input drainage direction map output Name for output watershed
>> basin map coordinates Coordinates of outlet point ERROR: r.water.outlet:
>> Sorry, is not a valid parameter ERROR: r.water.outlet: Sorry, is not a valid
>> parameter ERROR: Required parameter not set: (Coordinates of outlet point)
>> ERREUR :Couche raster non trouvÃ©e ERREUR :Raster map or group not found
>> ExÃ©cution de '/home/kyle/.qgis2//processing/grass7_batch_job.sh' terminÃ©e.
>> Nettoyage des fichiers temporaires ... Converting outputs Charger les
>> couches de résultat The following layers were not correctly generated. Basin
>> You can check the log messages to find more information about the execution
>> of the algorithm[/code]
>>
>>
>> Does anyone have an idea of what could be the problem? If you need further
>> information, do not hesitate to ask me.
>>
>> Thank you for your understanding,
>>
>> Guillaume
>>
>>
>>
>>
>> --
>> View this message in context: http://osgeo-org.1560.x6.nabble.com/GRASS7-r-water-outlet-returns-error-in-QGIS-2-14-2-tp5265113.html
>> Sent from the Quantum GIS - User mailing list archive at Nabble.com.
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>>
>> Micha Silver
>> Arava Drainage Authority
>> +972-523-665918
>>
>>
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