SRTM-3 Download

  • Suppose you want the DEM for Annapolis, MD, at N38.98, W76.48.
  • It is bounded by latitudes 38 and 39, and longitudes -76 and -77.
  • The SW corner is N38W077.
  • You want the file N38W077.hgt.zip.
  • Since Annapolis is almost at the edge of the DEM, you might want to also get the file to the north (N39W077.hgt.zip).  
  • Unzip . Do not rename the files. They have no header, and the file name must be correct for georegistration to work. 
  • Merge two (or more)  DEMs

Last revision 10/27/2017