MSAVI

Résumé

Calculates the Modified Soil Adjusted Vegetation Index (MSAVI2) from a multiband raster object and returns a raster object with the index values.

Discussion

La méthode de l’indice modifié de végétation ajusté au sol (MSAVI2) minimise l’effet du sol nu sur l’indice de végétation ajusté au sol (SAVI).

MSAVI2 = (1/2) * (2 * (NIR +1) - sqrt((2 * NIR + 1)2-8(NIR - Red)))

For information about other multiband raster indexes, see the Band Arithmetic raster function.

The referenced raster dataset for the raster object is temporary. To make it permanent, you can call the raster object's save method.

Syntaxe

MSAVI (raster, {nir_band_id}, {red_band_id})

Paramètre	Explication	Type de données
raster	The input raster.	Raster
nir_band_id	The band ID of the near-infrared band. The ID index uses one-based indexing. (La valeur par défaut est 4)	Integer
red_band_id	The band ID of the red band. The ID index uses one-based indexing. (La valeur par défaut est 3)	Integer

Valeur renvoyée

Type de données	Explication
Raster	The output raster object with the MSAVI2 index values.

Exemple de code

MSAVI example

Calculates the Modified Soil Adjusted Vegetation Index for a Landsat 8 image.

import arcpy

MSAVI_raster = arcpy.sa.MSAVI("Landsat8.tif", 5, 4)