General lists
DEM Availability (after Guth, P.L., 2004, MICRODEM home page: http://www.usna.edu/Users/oceano/pguth/website/microdem.htm)
Scale | Spacing | Data series | Coverage | Provider | Web Source | Notes |
Global | 5' (~10 km) | ETOPO5
TerrainBase |
Entire world, including ocean basins | NOAA | Global Terrain CD | |
2' long (lat has Mercator factor) | Smith & Sandwell Predicted topography | Entire world, including ocean basins | SIO/NOAA | Scripps | Ideal for base maps, especially for geologists | |
SRTM-30_Plus | Merge of SRTM30, Smith & Sandwell, and IBCAO | Entire world, including ocean basins | Scripps | Same format as GTOPO30 | ||
~30'' | Merge of GTOPO30, Smith & Sandwell, and IBCAO | Entire world | University of Alaska | GINA | BZIP format (??), and then GMT grids. | |
Continental | 30" (~1 km) | DTED 0 | Most of the world, land only | NGA | Geospatial Engine | |
GLOBE | Entire world, land only | NOAA | GLOBE | |||
GTOPO30 | Entire world, land only | USGS | GTOPO30 | Formula for Raster Calculator (GTOPO--> ARC) out_grid =
con(in_grid >= 32768, in_grid - 65536, in_grid) |
||
SRTM-30 | Entire world, land only | SRTM-30 | Best current data set at this scale. | |||
Regional | 3" (60-90 m) | DTED 1 | NGA | DoD use only | ||
SRTM-3 | JPL | Formula for Raster Calculator (CIGAR --> ARC) OUTGRID =
setnull(SRTMDEM == -32768, SRTMDEM) Entire world except for polar regions (broadly defined) and Australia. |
Free Satellite Imagery Availability (after Guth, P.L., 2004, MICRODEM home page: http://www.usna.edu/Users/oceano/pguth/website/microdem.htm)
Scale | Spacing | Data series | Coverage | Provider | Web Source | Notes |
Global | 1 km | MODIS | Worldwide | NASA | earthobservatory.nasa.gov | Blue Marble. |
Regional | 30 m | Landsat TM | Worldwide | NASA | zulu.ssc.nasa.gov |
|
Much of the world | University of Maryland | glcf.umiacs.umd.edu | Geotiff format. Compresses TIFFs, but will be about 200-300 MB per scene. | |||
10 m | SPOT | Parts of world | NIMA | Geospatial Engine | DOI (CIB in original military format) |
Global Geographic Data Sets
Global Geology Data Sets (after Guth, P.L., 2004, MICRODEM home page: http://www.usna.edu/Users/oceano/pguth/website/microdem.htm)
Additional resources
For questions or comments please contact: zeilinger@geo.uni-potsdam.de