CIg

Summary

Calculates the Green Chlorophyll Index (CIg) from a multiband raster object and returns a raster object with the index values.

Discussion

The Chlorophyll Index - Green (CIg) is a vegetation index for estimating the chlorophyll content in leaves using the ratio of reflectivity in the near-infrared (NIR) and green bands.

CIg = (NIR / Green)-1

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.

Syntax

CIg (raster, {nir_band_id}, {green_band_id})

Parameter	Explanation	Data Type
raster	The input raster.	Raster
nir_band_id	The band ID of the near-infrared band. The ID index uses one-based indexing. (The default value is 7)	Integer
green_band_id	The band ID of the green band. The ID index uses one-based indexing. (The default value is 3)	Integer

Return Value

Data Type	Explanation
Raster	The output raster object with the CIg index values.

Code sample

CIg example

Calculates the Chlorophyll Index - Green for a Landsat 8 image.

import arcpy

CIg_raster = arcpy.ia.CIg("Landsat8.tif", 5, 3)