The coordinate reference system is
latitude/longitude and the
WGS84 datum.
File Formats
A
"shapefile" consist of at least three actual files. This is a commonly used format that can be directly used in Arc-anything,
DIVA-GIS, and many other programs. Unfortunately, non-latin characters are garbled.
A
"RData" file can be used in
R (with the
sp package loaded)
Some files have been compressed and grouped in ZIP files. You can use programs such as 7-zip to decompress the files.