[GRASS-user] Errors returned for r.stream.order

[Brendan]

The flow accumulation from r.watershed should go into r.stream.exrract as
the input accumulation to calculate a stream raster and flow direction.
Then the flow accumulation, flow direction, stream raster, etc should go
into r.stream.order.

>From a glance, try one is missing r.stream.extract. Try two is missing
r.watershed. See my tutorial here:
https://baharmon.github.io/watersheds-in-grass/#stream-order



On Wed, Mar 12, 2025, 2:27 AM Maris Nartiss via grass-user <
grass-user at lists.osgeo.org> wrote:

> Please provide also your computational region settings. Could be that
> you are simply running out of RAM?
>
> Māris.
>
> trešd., 2025. g. 12. marts, plkst. 07:24 — lietotājs Ben Davies via
> grass-user (<grass-user at lists.osgeo.org>) rakstīja:
> >
> > OFFICIAL
> >
> >
> > Hello
> >
> >
> >
> > OS = Win 10
> >
> > GRASS GIS Version 8.3.0 64 Bit
> >
> >
> >
> > I am attempting to create a stream classification and have tried the two
> approaches below.
> >
> >
> >
> > Is there something wrong with my approach?
> >
> >
> >
> > Try 1
> >
> > gs.run_command('r.fill.dir', input=input_raster, output='fill',
> direction='flowdir_fill', overwrite=True)
> >
> > gs.run_command('r.watershed', flags='sa', elevation='fill',
> threshold=500000, basin='raster_basin', accumulation='flowacc',
> stream='stream_raster_watershed', overwrite=True)
> >
> > gs.run_command('r.stream.order', stream_rast='stream_raster_watershed',
> direction='flowdir_fill', elevation=input_raster, accumulation='flowacc',
> stream_vect='stream_vect', strahler='strahler', overwrite=True)
> >
> >
> >
> > Try 2
> >
> > gs.run_command('r.fill.dir', input=input_raster, output='fill',
> direction='flowdir_fill', overwrite=True)
> >
> > gs.run_command('r.stream.extract', elevation=input_raster,
> threshold=stream_threshold, stream_raster='stream_raster',
> stream_vector='stream_vector', direction='flowdir_extract', overwrite=True)
> >
> > gs.run_command('r.stream.order', stream_rast='stream_raster_watershed',
> direction='flowdir_extract', elevation=input_raster,
> accumulation='flowacc', stream_vect='stream_vect', strahler='strahler',
> overwrite=True)
> >
> >
> >
> >
> >
> > The GRASS GIS system returns the following error message to me;
> >
> >
> >
> > Traceback (most recent call last):
> >
> >   File
> >
> > "F:\grassdata\hydro\PERMANENT\.tmp\unknown\4728.20.py", line
> >
> > 255, in <module>
> >
> >     main()
> >
> >   File
> >
> > "F:\grassdata\hydro\PERMANENT\.tmp\unknown\4728.20.py", line
> >
> > 217, in main
> >
> >     gs.run_command('r.stream.order',
> >
> >   File "C:\Program Files\GRASS GIS
> >
> > 8.3\etc\python\grass\script\core.py", line 466, in
> >
> > run_command
> >
> >     return handle_errors(returncode, result=None, args=args,
> >
> > kwargs=kwargs)
> >
> >   File "C:\Program Files\GRASS GIS
> >
> > 8.3\etc\python\grass\script\core.py", line 345, in
> >
> > handle_errors
> >
> >     raise CalledModuleError(module=module, code=code,
> >
> > returncode=returncode)
> >
> > grass.exceptions.CalledModuleError: Module run
> >
> > `r.stream.order --o stream_rast=stream_raster_watershed
> >
> > direction=flowdir_extract elevation=dtm-002-004
> >
> > accumulation=flowacc stream_vect=stream_vect
> >
> > strahler=strahler` ended with an error.
> >
> > The subprocess ended with a non-zero return code:
> >
> > 3221225781. See errors above the traceback or in the error
> >
> > output.
> >
> >
> >
> > Regards
> >
> > Ben Davies
> >
> >
> >
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