DEM Availability

Supported data formats.     Bathymetery

Scale Spacing Data series Coverage Provider Web Source Notes
Global 5' (~10 km) ETOPO5 Entire world, including ocean basins NOAA  

 

 

Get ETOPO1 and thin

  2' ETOPO2       Get ETOPO1 and thin.
  2' long (lat has Mercator factor) Smith & Sandwell Predicted topography Entire world, including ocean basins SIO/NOAA Scripps Ideal for regional base maps, especially for geologists
  1' ETOPO1     NGDC Entire data set, or custom grids
  30" SRTM-15 Plus,
SRTM-30_Plus: Merge of SRTM30, Smith & Sandwell, and IBCAO
Entire world, including ocean basins   Scripps Get the SRTM version files, with a data file and an ERS header.  Open with MICRODEM which will use GDAL.  You will probably have to edit the header to get the correct SW corner.
30" (~1 km) GTOPO30 Entire world, land only USGS GTOPO30 Use GMTED2010 as better alternative.
  SRTM-30 Entire world, land only   SRTM-30 Use GMTED2010 as better alternative.
30", 15", and 7.5" Global Multi-resolution Terrain Elevation Data 2010 (GMTED2010) Entire world USGS GMTED  
Regional 3" (60-90 m) SRTM-3   JPL SRTM Entire world except for polar regions (broadly defined) 

National Map Viewer directions.

  2'' (40-60 m) USGS 100K United States USGS   Must order from USGS ($)
1" (20-30 m) SRTM-1   JPL

National Map Viewer

  3DEP (formerly NED) United States USGS National Map Viewer
  1" EU DEM Europe, Turkey, parts of North Africa      
    ALOS Global Digital Surface Model "ALOS World 3D - 30m" (AW3D30)     JAXA download or Home page  
1" ASTER GDEM World wide, complete coverage NASA/METI ASTER G-DEM ASTER G-DEM
10 m     NOAA  
  1/3" 3DEP (formerly NED) United States USGS National Map Viewer National Map Viewer "Best" available data from USGS.  
  1/9" 3DEP (formerly NED) United States USGS National Map Viewer National Map Viewer "Best" available data from USGS.  Very limited coverage at this scale
Point (Lidar)            

Bathymetry (DEMs under water)

DEM resolution: the tradeoff between detail and file size, and help on selecting the DEM series to use.

Commercial DEMs


Last revision 10/25/2017