The NCSCDv2 is based on polygons from different regional soils maps homogenized to the U.S. Soil Taxonomy. The database contains information on fractions of coverage of different soil taxa as well as storage of soil organic carbon (kg/m2) between 0–300 cm depth. The data is stored as ESRI shape-files with associated attribute table databases. There are separate zipped data-folders with: (1) a merged circumpolar dataset (2) all regions in separate shape-files, projected in the Lambert Azimuthal Equal Area (LAEA) projection and (3) all regions in separate shape-files with geographic latitude/longitude coordinates (WGS84).
For detailed technical descriptions of the polygon-data and discussion s regarding use of the database, we refer to this paper published in the journal Earth System Science Data Discussions.