30 Years of City Growth Seen From Space
China’s now-industrialized Pearl River Delta, seen in October 1973 (top) and January 2003 (bottom.) Vegetation appears red in these images.
Since the launch of its first satellite in 1972, the eight NASA/USGS Landsat satellites have made the longest continuous observations of Earth’s surface, providing invaluable data for research in agriculture, geology, forestry, regional planning, education, mapping, global change research, as well as important emergency response and disaster relief information. In addition, having such a long span of data allows us to easily see the expansion of human development in many areas — unprecedented before-and-after views of city growth seen from space.
These images, taken over the course of the Landsat program, illustrate the visible impact of over three decades of human development:
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© Jason Major for Universe Today, 2013. |
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Post tags: cities, Earth, expansion, growth, Landsat, LDCM, population, satellite, USGS
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Source: http://www.universetoday.com/103813/30-years-of-city-growth-seen-from-space/
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