[GRASS-user] r.basin not running completely

[jomaljochan]

Hi,
Thank you for your interest and time!

I had created a whole new location and ran the code only once. And it is
still showing the same. Moreover, the file in question is nowhere to be
found.

Is there any other possibility?



margherita wrote
> cc list
> 
> On Sat, Apr 25, 2020 at 9:11 AM Margherita Di Leo <

> diregola@

> >
> wrote:
> 
>> Hi,
>>
>> On Sat, Apr 25, 2020 at 8:49 AM jomaljochan <

> jochanjomal1998@

> >
>> wrote:
>>
>>> Hi, I am a new GRASS GIS User (using GRASS GIS 7.6.1) trying to get the
>>> morphometric parameters of a watershed(Bhadra river basin, India).
>>> Steps followed:
>>> 1) Cropped and set the DEM file in UTM projection.
>>> 2) Created a new location and used the georeferenced DEM file to set the
>>> projection of GRASS Session.
>>> 3) Ran the following lines of code:
>>>
>>>   g.region rast=elevation at PERMANENT -ap
>>>
>>>   r.watershed -a elevation=elevation at PERMANENT accumulation=accum
>>>
>>>   r.stream.extract elevation=elevation at PERMANENT accumulation=accum
>>> threshold=1000
>>>   stream_rast=stream_network stream_vect=streams --overwrite
>>>   #(overwrite with different threshold until clear network)
>>>
>>>   #Find the coordinates of the outlet from network and input in r.basin
>>> fn
>>>
>>>   r.basin map=elevation at PERMANENT prefix=out
>>> coordinates=572957.585125,1547823.44718
>>>   threshold=20 dir=tmp/my_basin
>>>
>>>
>>>
>>> The function stops running with the following error:
>>>
>>>   ERROR: option 
> <output>
> : <tmp/my_basin\out_elevation_outlet_coors.txt>
>>> exists. To overwrite, use the
>>>   --overwrite flag
>>>
>>>   ------------------------------
>>>
>>>   An ERROR occurred running r.basin
>>>   Please check for error messages above or try with another pairs of
>>> outlet
>>> coordinates
>>>   Removing region definition 
> <original>
>>>
>>> The command is telling you that an output with the same name is already
>> there. You need to delete it* and run the command again.
>>
>> *Sorry r.basin doesn't handle overwrite, as written in the manual.
>>
>> Hope this helps.
>>
>> Kind regards,
>>
>>
>> --
>> Margherita Di Leo
>>
> 
> 
> -- 
> Margherita Di Leo
> 
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