The Shuttle Radar Topography Mission (SRTM) collected high-resolution elevation data during the February 2000 flight of the Space Shuttle Endeavour. The data are available for download and can be used in Surfer. Surfer can read the SRTM BIL and HGT data files directly. You can use the BIL or HGT files in any function or command in place of a grid file.
Updated September 4, 2020