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Image Caption: Astronaut photography is useful for studying land-cover change in the
Houston area because the city has been photographed from space
repetitively over the last 30 years. These three photos, for example,
provide data points over a 10-year period that can be used to identify and, in some cases, quantify, changes. An obvious change is
construction of the Sam Houston Parkway (State Highway 8) circling the city. Other changes include growth and development of residential
subdivisions near Clear Lake, new developments north and east of Lake
Houston, and the Fred Hartman bridge between LaPorte and Baytown.