| Global |
SRTM3
This data was collected during the Shuttle Radar Topography Mission (SRTM) and contains global coverage from 56 degrees south latitude to 60 degrees north latitude in 1
by 1 degree blocks with an approximate resolution of 90 by 90 meters.
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SRTM30
This data was collected during the Shuttle Radar Topography Mission (SRTM) and contains global coverage from 56 degrees south latitude to 60 degrees north latitude with
an approximate resolution of 900 by 900 meters.
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GTOPO30
GTOPO30 is a global Digital Elevation Model (DEM) produced by the U.S. Geological Survey (USGS) with a horizontal grid spacing of 30 arc seconds (approximately 900 meters).
GTOPO30 was derived from several raster and vector sources of topographic information.
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