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Les données d'observation de la Terre par les satellites existent depuis la fin des années 1960, mais elles ont réellement pris leur essor en 1972, avec le lancement du premier satellite américain, Landsat, dont le capteur MSS, Multispectral Scanner, avait une résolution au sol de 80 mètres.
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Earth observation satellite data has been available since the late 60s, but really took off in 1972 with the launch of the first American satellite, Landsat, which had a multispectral scanner which offered 80-metre ground range resolution. At that time, the pool of potential end-users, working in fields such as geology, agriculture, the environment, cartography and oceanography, were not yet ready to incorporate the data into their daily work, given that technology, and in particular computer technology, was not as advanced as it is today. Furthermore, in an effort to generate interest in spatial data, certain parties overstated the advantages it offered, which, at times, had the effect of discrediting it in the eyes of clients.
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