Composite Bands (Data Management)

Summary

Creates a single raster dataset from multiple bands and can also create a raster dataset using only a subset of bands.

Illustration

Usage

• This tool can also create a raster dataset containing subset of the original raster dataset bands. This is useful if you need to create a new raster dataset with a specific band combination and order.

• The order that the bands are listed in the Multi-value Input control box will determine the order of the bands in the output raster dataset.

• This tool can only output a square cell size.

• You can save your output to BIL, BIP, BMP, BSQ, DAT, GIF, GRID, IMG, JPEG, JPEG 2000, PNG, TIFF, or any geodatabase raster dataset.

• The output raster dataset takes the cell size from the first raster band in the list.

• By default, the output raster dataset takes the extent and the spatial reference of the first raster band with a spatial reference in the list. You can change this by setting the output extent and output coordinate system in the Environment Settings.

• The following are some examples of why you would want to combine single raster datasets into multiband raster datasets:

  • You may have received some satellite data where each band of data is contained in a single file—for example, band1.tif, band2.tif, and band3.tif. To render these raster datasets together to create a color composite, each band needs to be contained within a single raster dataset (for example, allbands.tif).
  • You may have several raster datasets of the same area captured at various times. By displaying these raster datasets as a color composite, you can detect change in the area, such as urban growth or cut forests. To create this color composite, each raster dataset needs to be contained as individual bands within a single raster dataset.
  • In some cases, the output of an analysis operation is a single-band raster dataset. To do further visual analysis, you may need to combine the outputs by rendering your data as a color composite.
  • Combining bands into one raster dataset can help you organize many related single-band rasters.

Syntax

CompositeBands_management (in_rasters, out_raster)

Parameter	Explanation	Data Type
in_rasters [in_rasters,...]	The input raster datasets.	Mosaic Dataset ; Mosaic Layer ; Raster Dataset ; Raster Layer
out_raster	The output raster dataset. When storing the raster dataset in a file format, you need to specify the file extension: .bil—ESRI BIL .bip—ESRI BIP .bmp—BMP .bsq—ESRI BSQ .dat—ENVI DAT .gif—GIF .img—ERDAS IMAGINE file .jpg—JPEG .jp2—JPEG 2000 .png—PNG .tif—TIFF no extension—ESRI GRID When storing a raster dataset in a geodatabase, no file extension should be added to the name of the raster dataset. When storing your raster dataset to a JPEG file, a JPEG 2000 file, a TIFF file, or a geodatabase, you can specify a compression type and compression quality.	Raster Dataset

Code Sample

This is a Python sample for the Composite Bands tool.

import arcpy
from arcpy import env
env.workspace = "c:/data"
arcpy.CompositeBands_management("band1.tif;band2.tif;band3.tif",
                                "compbands.tif")

This is a Python script sample for the Composite Bands tool.

##====================================
##Composite Bands
##Usage: CompositeBands_management in_rasters;in_rasters... out_raster

try:
    import arcpy
    arcpy.env.workspace = r"C:/Workspace"
    
    ##Compose multi types of single band raster datasets to a TIFF format raster dataset
    arcpy.CompositeBands_management("band1.tif;comp.mdb/band2;comp.gdb/bands/Band_3","compbands.tif")
    
except:
    print "Composite Bands example failed."
    print arcpy.GetMessages()

Environments

Compression, Current Workspace, Output CONFIG Keyword, Output Coordinate System, Extent, Pyramid, Raster Statistics, ResamplingMethod, Scratch Workspace, Snap Raster, Tile Size

Licensing Information

ArcView: Yes

ArcEditor: Yes

ArcInfo: Yes