Glossary for Geospatial Science

spectral band or spectral region:� A well-defined, continuous wavelength range in the spectrum of reflected or radiated electromagnetic energy.� Red, green, and blue are all spectral regions within the portion of the spectrum that is visible to humans as light.� Color-infrared images are composed of red, green, and a spectral region commonly called the photoinfrared, which is not in the visible portion of the electromagnetic spectrum.� (See also: color-infrared, electromagnetic spectrum.)