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 parametersSYNOPSIS
i.vi.mpi
i.vi.mpi --helpi.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
Table of contents
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.eduA 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
SEE ALSO
i.albedoAUTHOR
GRASS Development Team.SOURCE CODE
Available at: i.vi.mpi source code (history)
Latest change: Monday Jan 30 19:52:26 2023 in commit: cac8d9d848299297977d1315b7e90cc3f7698730
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© 2003-2023 GRASS Development Team, GRASS GIS 8.3.dev Reference Manual