Circum-Arctic Map of Permafrost and Ground-Ice Conditions, Version 2
The Circum-Arctic permafrost and ground ice map is available via ftp in ESRI Shapefile format and Equal-Area Scalable Earth Grid (EASE-Grid) format. See the Format section for an explanation of the files provided via FTP.

The circumpolar permafrost and ground ice data contribute to a unified international data set …