Resumen
Calculates the Burn Area Index (BAI) from a multiband raster object and returns a raster object with the index values.
Debate
El Índice de área calcinada (BAI) utiliza los valores de reflectancia de la parte roja y NIR del espectro para identificar las áreas del terreno afectadas por un incendio.
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.
Sintaxis
BAI (raster, {red_band_id}, {nir_band_id})
Parámetro | Explicación | Tipo de datos |
raster | The input raster. | Raster |
red_band_id | The band ID of the red-edge band. The ID index uses one-based indexing. (El valor predeterminado es 3) | Integer |
nir_band_id | The band ID of the near-infrared band. The ID index uses one-based indexing. (El valor predeterminado es 4) | Integer |
Tipo de datos | Explicación |
Raster | The output raster object with the BAI values. |
Muestra de código
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")
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")