Installation in the folder includes:
File: Antarctica.zip - contains raster data for Digital Elevation Model of Antarctica,
  from GTOPO30 project.
  Size of the file is 7.05MB.
File: Bathymetry.zip - contains raster data for Digital Elevation Model of Earth,
  from GTOPO30 project and SRTM mission with resolution 30", populated also with
  bathymetry data. The original source of the data compiled by UCSD.
  Size of the file is 821MB.
File: GTOPO30Ext.zip - contains raster data for Digital Elevation Model of Earth,
  from GTOPO30 project with resolution 30", populated also with data from
  USGS DEM 1 Quads with resolution 3" for Alaska, Aleutian Islans and Hawaii.
  Size of the file is 388MB.
Set of files, which should be kept together in a separated folder, like "SRTM3" - contains
  raster data for Digital Elevation Model of Earth from SRTM mission with resolution 3"
  in latitudinal limits of the mission, populated outside these limits with data derived
  from GTOPO30 project with resolution 30" and known as SRTM30. The set contains files:
    SRTM3_.zip : Main (or root) archive for installation;
    _A_.zip, _B_.zip, _C_.zip, _D_.zip, _E_.zip, _F_.zip, _G_.zip, _H_.zip, _I.zip :
      subpart archives with content pertained to internal scope of root folder from main
      archive.
  Total size of the set is 12.3GB.
