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#1 Federal
Global Topographic 30 Arc-Second Digital Elevation Model: Released 1996
- Organization: Department of the Interior
- Dataset Last Updated: July 19, 2023 at 12:00 AM
'GTOPO30 is a global digital elevation model (DEM) with a horizontal grid spacing of 30 arc seconds (approximately 1 kilometer). GTOPO30 was derived from several raster and vector sources of...
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- xml
Search relevance: 1.00 | Views last month: 19 | Catalog Last Checked: August 01, 2026 at 04:27 AM
#2 Federal
Shuttle Radar Topography Mission 1 Arc-Second Digital Terrain Elevation Data - Global - National Geospatial Data Asset (NGDA)
- Organization: Department of the Interior
- Dataset Last Updated: June 01, 2019 at 12:00 AM
The Shuttle Radar Topography Mission (SRTM) was a partnership between NASA and the National Geospatial-Intelligence Agency (NGA). Flown aboard the NASA Space Shuttle Endeavour (11-22 February...
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- xml
Search relevance: 1.00 | Views last month: 9 | Catalog Last Checked: August 01, 2026 at 04:05 AM

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