NAME
r.threshold - Find optimal threshold for stream extraction
KEYWORDS
raster,
hydrology,
threshold
SYNOPSIS
r.threshold
r.threshold --help
r.threshold [-g] acc=acc [--help] [--verbose] [--quiet] [--ui]
Flags:
- -g
- Print the threshold value in shell script style
- --help
- Print usage summary
- --verbose
- Verbose module output
- --quiet
- Quiet module output
- --ui
- Force launching GUI dialog
Parameters:
- acc=acc [required]
- Name of accumulation raster map
r.threshold finds optimal threshold for stream extraction.
The module finds a first tentative value of upslope area to be used as input to
extract the river network using
r.stream.extract or
r.watershed.
Real streams depend on many factors, such as rainfall, infiltration rate,
geology, climate etc. i.e. the same topography in different parts of
the world yields different real stream networks. This approach provides
a best guess about what makes sense when looking only at the DEM.
r.threshold acc=accumulation_map
r.stream.extract,
r.watershed
Margherita Di Leo (dileomargherita AT gmail DOT com)
SOURCE CODE
Available at:
r.threshold source code
(history)
Latest change: Monday Jan 30 19:52:26 2023 in commit: cac8d9d848299297977d1315b7e90cc3f7698730
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GRASS Development Team,
GRASS GIS 8.4.1dev Reference Manual