BAI

サマリー

Calculates the Burn Area Index (BAI) from a multiband raster object and returns a raster object with the index values.

説明

燃焼エリア指数 (BAI) は、赤の反射率の値とスペクトルの NIR 部分を使用して、火の影響を受けるテレインの地域を識別します。

BAI = 1/((0.1 -RED)^2 + (0.06 - NIR)^2)

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.

構文

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

パラメーター	説明	データ タイプ
raster	The input raster.	Raster
red_band_id	The band ID of the red-edge band. The ID index uses one-based indexing. (デフォルト値は次のとおりです 3)	Integer
nir_band_id	The band ID of the near-infrared band. The ID index uses one-based indexing. (デフォルト値は次のとおりです 4)	Integer

戻り値

データ タイプ	説明
Raster	The output raster object with the BAI values.

コードのサンプル

BAI example

Calculates the Burn Area Index for a Landsat 8 image.

from arcpy.sa import *
out_bai_raster = BAI("landsat8.tif", 3, 4)
out_bai_raster.save("C:/arcpyExamples/outputs/BAI.tif")

BAI example

Calculates the Burn Area Index for a Landsat 8 image.

# Import system modules
import arcpy
from arcpy.sa import *

# Set the analysis environments
arcpy.env.workspace = "C:/arcpyExamples/data"

# Set the local variables
in_raster = "landsat8.tif"

# Execute BAI function
out_bai_raster = BAI(in_raster, 3, 4)

# Save the output
out_bai_raster.save("C:/arcpyExamples/outputs/BAI.tif")