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Geographic information from space
Over the past few decades, the science of remote sensing has evolved dramatically. In its early years, remote sensing was oriented towards military applications and its civil use was largely limited to the production of colourful mosaics; they served to brighten up offices but were of little practical use. As techniques for interpretation of remotely sensed data improved, scientists and planners in a wide range of fields began to use classified images in their work. It is only recently, however, that the wider potential of satellites to produce geographic information has started to be recognised.
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