i.water - GRASS GIS manual

Note: This document is for an older version of GRASS GIS that has been discontinued. You should upgrade, and read the current manual page.

NAME

i.water - Water detection from satellite data derived indices, 1 if found, 0 if not

KEYWORDS

imagery, water, detection

SYNOPSIS

i.water

i.water --help

i.water ndvi=name [albedo=name] [modref7=name] output=name [--overwrite] [--help] [--verbose] [--quiet] [--ui]

Flags:

--overwrite: Allow output files to overwrite existing files
--help: Print usage summary
--verbose: Verbose module output
--quiet: Quiet module output
--ui: Force launching GUI dialog

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]

DESCRIPTION
NOTES
REFERENCES
SEE ALSO
AUTHOR

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.

AUTHOR

Yann Chemin, International Rice Research Insitute, The Philippines

SOURCE CODE

Available at: i.water source code (history)

Latest change: Monday Jan 30 19:49:11 2023 in commit: 5fb6b1a969e72db28df78483d3360b15a17f0c68