i.vi.mpi - GRASS GIS manual

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.vi.mpi - Calculates different types of vegetation indices (mpi)
13 types of vegetation indices from red and nir,and only some requiring additional bands

KEYWORDS

vegetation index, biophysical parameters

SYNOPSIS

i.vi.mpi

i.vi.mpi --help

i.vi.mpi viname=string red=name nir=name [green=name] [blue=name] [chan5=name] [chan7=name] [tmp=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:

viname=string [required]: Name of VI; Options: dvi, evi, gvi, gari, gemi, ipvi, msavi, msavi2, ndvi, pvi, savi, sr, vari, wdvi; Default: ndvi; dvi: Difference Vegetation Index; evi: Enhanced Vegetation Index; gvi: Green Vegetation Index; gari: Green atmospherically resistant vegetation index; gemi: Global Environmental Monitoring Index; ipvi: Infrared Percentage Vegetation Index; msavi: Modified Soil Adjusted Vegetation Index; msavi2: second Modified Soil Adjusted Vegetation Index; ndvi: Normalized Difference Vegetation Index; pvi: Perpendicular Vegetation Index; savi: Soil Adjusted Vegetation Index; sr: Simple Ratio; vari: Visible Atmospherically Resistant Index; wdvi: Weighted Difference Vegetation Index
red=name [required]: Name of the RED Channel surface reflectance map [0.0;1.0]; Range: [0.0;1.0]
nir=name [required]: Name of the NIR Channel surface reflectance map [0.0;1.0]; Range: [0.0;1.0]
green=name: Name of the GREEN Channel surface reflectance map [0.0;1.0]; Range: [0.0;1.0]
blue=name: Name of the BLUE Channel surface reflectance map [0.0;1.0]; Range: [0.0;1.0]
chan5=name: Name of the CHAN5 Channel surface reflectance map [0.0;1.0]; Range: [0.0;1.0]
chan7=name: Name of the CHAN7 Channel surface reflectance map [0.0;1.0]; Range: [0.0;1.0]
tmp=integer: User input for number of operation
output=name [required]: Name of the output vi layer; Name for output raster map

DESCRIPTION
Description
NOTES
TODO
SEE ALSO
AUTHORS

DESCRIPTION

i.vi calculates vegetation indices based on biophysical parameters.

RVI: ratio vegetation index:
NDVI: Normalized Difference Vegetation Index
IPVI: Infrared Percentage Vegetation Index
DVI: Difference Vegetation Index
PVI: Perpendicular Vegetation Index
WDVI: Weighted Difference Vegetation Index
SAVI: Soil Adjusted Vegetation Index
GARI: Green atmospherically resistant vegetation index
MSAVI: Modified Soil Adjusted Vegetation Index
MSAVI2: second Modified Soil Adjusted Vegetation Index
GEMI: Global Environmental Monitoring Index
ARVI: atmospherically resistant vegetation indices
GVI: Green Vegetation Index

Description

NDVI

Data Type Band Numbers ([IR, Red])
TM Bands= [4,3]
MSS Bands = [7, 5]
AVHRR Bands = [2, 1]
SPOT XS Bands = [3, 2]
AVIRIS Bands = [51, 29]
example: (AVHRR) NDVI = (channel 2 - channel 1) / (channel 2 + channel 1)

NOTES

Originally from kepler.gps.caltech.edu
A FAQ on Vegetation in Remote Sensing
Written by Terrill W. Ray
Div. of Geological and Planetary Sciences
California Institute of Technology
email: terrill@mars1.gps.caltech.edu
Snail Mail: Terrill Ray
Division of Geological and Planetary Sciences
Caltech
Mail Code 170-25
Pasadena, CA 91125

TODO

AUTHORS

GRASS Development Team.

SOURCE CODE

Available at: i.vi.mpi source code (history)

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