i.water
Water detection from satellite data derived indices, 1 if found, 0 if not
i.water ndvi=name [albedo=name] [modref7=name] output=name [--overwrite] [--verbose] [--quiet] [--qq] [--ui]
Example:
i.water ndvi=name output=name
grass.script.run_command("i.water", ndvi, albedo=None, modref7=None, output, overwrite=None, verbose=None, quiet=None, superquiet=None)
Example:
gs.run_command("i.water", ndvi="name", output="name")
grass.tools.Tools.i_water(ndvi, albedo=None, modref7=None, output, overwrite=None, verbose=None, quiet=None, superquiet=None)
Example:
tools = Tools()
tools.i_water(ndvi="name", output="name")
This grass.tools API is experimental in version 8.5 and expected to be stable in version 8.6.
Parameters
ndvi=name [required]
Name of the NDVI layer [-]
albedo=name
Name of the Albedo layer [-]
modref7=name
Name of the Modis surface reflectance band 7 layer [-]
output=name [required]
Name of the output water layer [0/1]
--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
ndvi : str, required
Name of the NDVI layer [-]
Used as: input, raster, name
albedo : str, optional
Name of the Albedo layer [-]
Used as: input, raster, name
modref7 : str, optional
Name of the Modis surface reflectance band 7 layer [-]
Used as: input, raster, name
output : str, required
Name of the output water layer [0/1]
Used as: output, raster, name
overwrite: bool, optional
Allow output files to overwrite existing files
Default: None
verbose: bool, optional
Verbose module output
Default: None
quiet: bool, optional
Quiet module output
Default: None
superquiet: bool, optional
Very quiet module output
Default: None
ndvi : str, required
Name of the NDVI layer [-]
Used as: input, raster, name
albedo : str, optional
Name of the Albedo layer [-]
Used as: input, raster, name
modref7 : str, optional
Name of the Modis surface reflectance band 7 layer [-]
Used as: input, raster, name
output : str, required
Name of the output water layer [0/1]
Used as: output, raster, name
overwrite: bool, optional
Allow output files to overwrite existing files
Default: None
verbose: bool, optional
Verbose module output
Default: None
quiet: bool, optional
Quiet module output
Default: None
superquiet: bool, optional
Very quiet module output
Default: None
DESCRIPTION
i.water calculates a water layer after Xiao et al (2005) and Roy et al (2005). If input is albedo and ndvi, it will process in generic mode. If input is ndvi and MODIS Band 7 reflectance, it will process in MODIS mode.
NOTES
REFERENCES
Xiao X., Boles S., Liu J., Zhuang D., Frokling S., Li C., Salas W., Moore III B. (2005). Mapping paddy rice agriculture in southern China using multi-temporal MODIS images. Remote Sensing of Environment 95:480-492. Roy D.P., Jin Y., Lewis P.E., Justice C.O. (2005). Prototyping a global algorithm for systematic fire-affected area mapping using MODIS time series data. Remote Sensing of Environment 97:137-162.
SEE ALSO
AUTHOR
Yann Chemin, International Rice Research Insitute, The Philippines
SOURCE CODE
Available at: i.water source code
(history)
Latest change: Thursday Feb 20 13:02:26 2025 in commit 53de819