A layer in a raster dataset.
A raster dataset contains one or more layers called bands. For example, a color image has three bands (red, green, and blue) while a digital elevation model (DEM) has one band (holding elevation values), and a multispectral image may have many bands.
Each raster band contains the actual cell values, as well as some key properties, such as:
- Statistics: minimum, maximum, and mean cell values
- Histogram of cell values
- Default color map for raster display (optional)
Examples of a 1 band raster are
- Elevation Data
- Grayscale aerial imagery
- Scanned maps/documents
Examples of 3 band raster are
- Most color TIFFs, IMGS or MrSIDSs
- Remotely Sensed/Spectral data