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.
Surfer 11 and previous versions do not support HGT files, and Surfer 8 and previous do not support BIL files; however, both HGT and BIL files can be modified for use in these older versions of Surfer. Please follow the instructions in the attached newsletter article: Using Shuttle Radar Topography Mission (SRTM) Data in Surfer.
Updated October 25, 2018
Attachments: Using Shuttle Radar Topography Mission (SRTM) Data in Surfer.pdf