Processing Terrain Data
| Data Set | Coverage | Resolution Level | Format Type | Web Link |
|---|---|---|---|---|
| ASTER | Global | 1 arc-second (~30m) 1° by 1° tiles |
GeoTIFF | https://earthexplorer.usgs.gov/ |
| CDED | Canada | 0.75 arc-second (~23m) 3 arc-second (~100m) |
DEM | http://www.geobase.ca/ |
| GTOPO30 | Global | 30 arc-second (~1 km) 30 arc-second (~1 km) |
DEM | https://earthexplorer.usgs.gov/ |
| GMTED2010 | Global | 15 arc-second (~500 m) 7.5 arc-second (~250 m) |
GeoTIFF | https://earthexplorer.usgs.gov/ |
| IFSAR | Alaska | 2 arc-second (Alaska) 1 arc-second (U.S., most of Canada, Mexico, Hawaii, portions of Alaska) |
ArcGrid | https://earthexplorer.usgs.gov/ |
| NED 3 | U.S. | 1/3 arc-second (U.S., Hawaii, and portions of Alaska), or 1/9 arc-second (limited areas of U.S.) |
GridFloat / IMG | http://nationalmap.gov/viewer.html |
| SRTM 1 | U.S. | SRTM1: 1 arc second (~30m) | SRTM | https://earthexplorer.usgs.gov/ |
| SRTM 3 | Global | SRTM3: 3 arc-second (~100m) | SRTM | |
| SRTM30 | Global | SRTM30: 30 arc-second (~1 km) | SRTM | http://dds.cr.usgs.gov/srtm/version2_1/SRTM30/ |