Infrared Aerial Photography uses color-infrared film to capture geographical images from a camera mounted on high-altitude aircraft or satellites. Near-infrared light is invisible to the human eye but when added to a photograph it enhances the image. The result is "color-infrared" photography. Certain geographic features, such as vegetation, will be highly reflective of near-infrared wavelengths and so appear red, while bodies of water absorb the wavelengths and appear black. Other features vary in the color that they appear as, and so the map can be used to understand various aspects of the terrain. This Color-infrared aerial photograph is of the Chausey Islands in France taken at low tide, as was taken to observe patterns of seawood.
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