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The topography of the Kamchatka Peninsula is depicted in this scene.
The lower image shows a map derived by processing part of the DEM data in IDRISI.
GTOPO30 is a global digital elevation model (DEM) developed between 1993 and 1996 using many data sources, including satellite imagery, as a collaborative effort led by staff of the U.S. Geological Survey, EROS Data
Center. Elevations in GTOPO30 are regularly spaced at 30-arc seconds (approximately
1 kilometer). GTOPO30 data is available for downloading free of charge from the
USGS - NASA Distributed Active Archive Center. (IDRISI users need to use FLIP on import to change the byte order from Unix to Intel.)
The Web URL is: http://edcdaac.usgs.gov/gtopo30/gtopo30.html (GTOPO30 tile: E140N90.) Compare this image (1 km resolution) with NASA's Shuttle Radar Topography Mission (SRTM) image (30 m resolution) of the same area: http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=10826
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The URL of this site is [www.geoscience2000.info]
Author: Fred
Colbourne |