After the launch of Terra satellite in December of 1999, ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) has been stably collecting Earth observation data for more than 5 yeas, getting a very close cooperation with NASA. As of April 2005, total number of observed scenes is approaching to one million scenes, and covering most of the land area of the Earth multiple times. In this paper, the geometric and radiometric accuracy of ASTER data will be discussed, together with

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... t of the DEM (Digital Elevation Model). In addition, the possibility of the application derived from its high accuracy.