SATELLITE IMAGERY

Remote sensing imagery gathered by earth-orbiting satellites, including Landsat and Spot. Images are in specific wavebands (visible, infrared, etc.), which may be combined for purposes of interpretation. Images look like photographs but are not obtained by photographic methods, hence the term "images" or "imagery". Data from satellite imagery can be interpreted visually or analysed by computers in digitized form; they can also be entered directly into geographic information systems. FAO (1993)