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ASTER Global Digital Elevation Model Version 2 - summary of validation results

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Tetushi Tachikawa, Manabu Kaku, Akira Iwasaki, Dean B. Gesch, Michael J. Oimoen, Z. Zhang, Jeffrey J. Danielson, Tabatha Krieger, Bill Curtis, Jeff Haase, Michael Abrams, and C. Carabajal, 2011, ASTER Global Digital Elevation Model Version 2 - summary of validation results: NASA.

Summary

On June 29, 2009, NASA and the Ministry of Economy, Trade and Industry (METI) of Japan released a Global Digital Elevation Model (GDEM) to users worldwide at no charge as a contribution to the Global Earth Observing System of Systems (GEOSS). This “version 1” ASTER GDEM (GDEM1) was compiled from over 1.2 million scenebased DEMs covering land surfaces between 83°N and 83°S latitudes. A joint U.S.-Japan validation team assessed the accuracy of the GDEM1, augmented by a team of 20 cooperators. The GDEM1 was found to have an overall accuracy of around 20 meters at the 95% confidence level. The team also noted several artifacts associated with poor stereo coverage at high latitudes, cloud contamination, water masking issues and the stacking [...]

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