"... NASA has a detailed map of the Earth
In can be downloaded free from www.gdem.aster.ers dac.or.jp prepared a detailed digital map information obtained by NASA's Terra satellite technologies with Aster (Radiometer spatial reflection and thermal emission Advanced) GDEM (global digital elevation model).
The mosaic, led by the U.S. space agency and the Ministry of Economy of Japan, was obtained after processing 1.3 million Optical Image File Aster, covering the land surface between 83 degrees north and 93 degrees south. According to Woody Turner, mission scientist, is "the digital database of elevations and terrain most complete and comprehensive ever made. "disciplines that will serve to require data on land elevations and as engineers, planners and ecologists ..."
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