Canadian Ice Service Arctic Regional Sea Ice Charts in SIGRID-3 Format, Version 1

The Canadian Ice Service (CIS) produces digital Arctic regional sea ice charts for marine navigation, forecasting, and climate research. The ice charts are created through the manual analysis of in situ, satellite, and aerial reconnaissance data. The ice charts have information on ice concentration, stage of development, and ice form, following World Meteorological Organization terminology. This digital record of sea ice charts begins in 2006 and covers the following regions of the Canadian Arctic: Northern Canadian waters (Western Arctic, Eastern Arctic, and Hudson Bay) and Southern Canadian waters (Great Lakes and East Coast). Each regional shapefile (.shp) (encoded in SIGRID-3 format) and associated metadata file (.xml) are combined into a tar archive file (.tar) for distribution.

Please note that the latest SIGRID-3 charts are available for operational or tactical users directly from CIS at https://ice-glaces.ec.gc.ca/prods/sigrids/.

Data and Resources

Additional Info

Field Value
Maintainer Earthdata Forum
Last Updated September 29, 2026, 04:22 (UTC)
Created April 1, 2025, 14:59 (UTC)
accessLevel public
bureauCode {026:00}
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
harvest_object_id 78708008-8a92-417e-a83e-b620856d851e
harvest_source_id b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title Science Discovery Engine
identifier 10.7265/N51V5BW9
license https://www.usa.gov/government-works
modified 2026-09-21T22:16:03Z
programCode {026:000}
publisher NSIDC
resource-type Dataset
source_datajson_identifier true
source_hash 3e179bc2a74aec74b69b9aca93776d84223ae1b4a36ca4dbbb04eb66902302a8
source_schema_version 1.1
spatial ["CARTESIAN", [{"WestBoundingCoordinate": -164.05002, "NorthBoundingCoordinate": 83.19372, "EastBoundingCoordinate": 21.96925, "SouthBoundingCoordinate": 39.52777}]]
temporal 2006-01-01/2026-09-21
theme {"Earth Science"}