Extract Bands function

The Extract Bands function allows you to extract one or more bands from, or reorder the bands in, a multiband raster layer.

Notes

The extract Method parameter allows you to choose the type of keyword to use while extracting bands. The options are Band ID, Band Names, and Band Wavelengths.

The Combination parameter used to specify the order of the bands to extract. The bands are entered as a space-delimited list. For example, to extract bands 3, 4, and 5 from a 6-band image, enter 3 4 5. Alternatively, you can use the extract drop-down box to populate the list.

You can use the Extract Bands function before other functions, such as Arithmetic, to control which bands are used as input in the next function.

Parameters

Parameter	Description
Raster	The raster product from which the band or bands will be extracted:
Method	Select one of the following methods for extracting bands: Band Names—Uses the band name representing the wavelength interval on the electromagnetic spectrum (Red, Near Infrared, Thermal Infrared, for example). This can also be designated as a band number ID. Band Wavelengths—The wavelength on the electromagnetic spectrum. Band IDs—The band designation or number, which is unique for each sensor. These can be identical to the Band Names.
Band	Select the bands to extract from a list based on the Method parameter option used.
Combination	The band combination or band order. The selection list depends on the Method option specified. For example, if Method is Band Names, you can select a Blue, Green, and Red combination to extract a natural color image.
Missing Band Action	Specify the action that will occur when a band within the extract band list is not available. Best Match—Finds the best available band to use in place of the missing band based on wavelength, so that the function will not fail Fail—If the input dataset is missing any band specified in the Band parameter, the function will fail.