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#1
June 30th 09, 03:09 PM
posted to rec.aviation.soaring
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ASTER Global Digital Elevation Map
Japan’s Ministry of Economy, Trade and industry (METI) and NASA
announced the release of the ASTER Global Digital Elevation Model (GDEM) on June 29, 2009. The GDEM was created by stereo-correlating the 1.3 million scene ASTER VNIR archive, covering the Earth’s land surface between 83N and 83S latitudes. The GDEM is produced with 30 meter postings, and is formatted in 1 x 1 degree tiles as GeoTIFF files. Each GDEM file is accompanied by a Quality Assessment file, either giving the number of ASTER scenes used to calculate a pixel’s value, or indicating the source of external DEM data used to fill the ASTER voids. Might be the next step in terrain maps for soaring. Martin 
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#2
June 30th 09, 03:11 PM
posted to rec.aviation.soaring
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ASTER Global Digital Elevation Map
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