i.lmf - GRASS GIS manual

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

Note: This addon document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade your GRASS GIS installation, and read the current addon manual page.

NAME

i.lmf - Performs Temporal Local Maximum Fitting of vegetation indices, works also for surface reflectance data.

KEYWORDS

imagery, LMF, Vegetation Indices, Atmospheric correction, Temporal

SYNOPSIS

i.lmf

i.lmf --help

i.lmf input=name[,name,...] ndate=integer 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:

input=name[,name,...] [required]: Names of input layers
ndate=integer [required]: Number of map layers per year
output=name [required]: Name of the output layer

DESCRIPTION
NOTES
TODO
SEE ALSO
AUTHORS

DESCRIPTION

i.lmf calculates the Local maximum fitting of a temporal image series, intially for vegetation indices, it also works for surface reflectance.

This is a first level port, only a fast fitting is done, see TODO.

The number of bands is potentially several years, nfiles and ndates are respectively the number of pixels and the number of pixels in a year.

Original links are found here SAWADA, 2001: http://www.affrc.go.jp/ANDES/sawady/index.html NAGATANI et al., 2002: http://www.gisdevelopment.net/aars/acrs/2002/pos2/184.pdf Yann Chemin and Kiyoshi Honda repaired it and ported it from SGI/OpenMP to Linux. http://www.rsgis.ait.ac.th/~honda/lmf/lmf.html

TODO

Port the full detailed algorithm from Fortran, and vastly unemcomber/clean it. It will make the algorithm must slower though, gaining only a marginal fitting strength, for my actual experience with VIs curves.

AUTHORS

Yann Chemin, International Rice Research Institute, The Philippines

SOURCE CODE

Available at: i.lmf source code (history)

Latest change: Monday Jun 28 07:54:09 2021 in commit: 1cfc0af029a35a5d6c7dae5ca7204d0eb85dbc55