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r.wateroutlet.lessmem

Creates watershed basins from a drainage direction map.

r.wateroutlet.lessmem input=name output=name coordinates=east,north [--overwrite] [--verbose] [--quiet] [--qq] [--ui]

Example:

r.wateroutlet.lessmem input=name output=name coordinates=east,north

grass.script.run_command("r.wateroutlet.lessmem", input, output, coordinates, overwrite=False, verbose=False, quiet=False, superquiet=False)

Example:

gs.run_command("r.wateroutlet.lessmem", input="name", output="name", coordinates=east,north)

Parameters

input=name [required]
    Name of input drainage direction map
output=name [required]
    Name for output watershed basin map
coordinates=east,north [required]
    Coordinates of outlet point
--overwrite
    Allow output files to overwrite existing files
--help
    Print usage summary
--verbose
    Verbose module output
--quiet
    Quiet module output
--qq
    Very quiet module output
--ui
    Force launching GUI dialog

input : str, required
    Name of input drainage direction map
    Used as: input, raster, name
output : str, required
    Name for output watershed basin map
    Used as: output, raster, name
coordinates : tuple[float, float] | list[float] | str, required
    Coordinates of outlet point
    Used as: input, coords, east,north
overwrite: bool, optional
    Allow output files to overwrite existing files
    Default: False
verbose: bool, optional
    Verbose module output
    Default: False
quiet: bool, optional
    Quiet module output
    Default: False
superquiet: bool, optional
    Very quiet module output
    Default: False

DESCRIPTION

r.wateroutlet.lessmem is a modified version of r.water.outlet and requires about one third of memory compared to the original module. Input drainage direction information is stored as 4-bit segments in the buffer and output basin result is stored as 1-bit data. Because of heavy bitwise operations, there may be some performance penalty depending on the size of the input map. Other than memory management, this module uses the same interface and algorithm in r.water.outlet, so please refer to r.water.outlet for more details.

SEE ALSO

r.water.outlet

AUTHOR

Huidae Cho
based on r.water.outlet

SOURCE CODE

Available at: r.wateroutlet.lessmem source code (history)
Latest change: Thursday Feb 20 13:02:26 2025 in commit 53de819