The data support files presented are based off U.S. National Ice Center (USNIC) Arctic daily or weekly ice analysis. Support products are offered as GIS files with shapefiles and KMZs, and various text files.
Three GIS shapefiles are created off the USNIC daily Arctic ice analysis.
Two KMZ files are created with attributes defined by ice concentration.
A GIS shapefile is created off the USNIC weekly Arctic ice analysis. A more thorough ice analysis than the daily ice analysis that separates ice areas to include total ice concentration, ice types with their respective concentrations and ice forms where applicable.
The Arctic KMZ file is created off the USNIC Weekly Arctic ice analysis. The files contain SIGRID-3 information on ice conditions that are separated into total ice concentration, ice types with their respective concentrations, and ice floe size.
Text files are based off the USNIC daily Arctic ice analysis. Files created are in latitude / longitude pairs for portability and can be parsed into various platforms and programs. The following are a detail of file contents and format: