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

[Ben Davies]

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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