<?xml version="1.0" encoding="UTF-8"?><OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd"><responseDate>2026-04-15T02:41:13Z</responseDate><request identifier="G02171.001" metadataPrefix="dif" verb="GetRecord">http://nsidc.org/api/dataset/metadata/oai</request><GetRecord><record><header><identifier>oai:nsidc.org/G02171.001</identifier><datestamp>2025-12-03T15:17:17Z</datestamp><setSpec>v0_other</setSpec><setSpec>v0_all</setSpec><setSpec>noaa</setSpec></header><metadata>
<DIF xmlns="http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/ http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/dif_v9.7.1.xsd"><Entry_ID>G02171.001</Entry_ID><Entry_Title>Canadian Ice Service Arctic Regional Sea Ice Charts in SIGRID-3 Format</Entry_Title><Data_Set_Citation><Dataset_Creator>Canadian Ice Service</Dataset_Creator><Dataset_Title>Canadian Ice Service Arctic Regional Sea Ice Charts in SIGRID-3 Format</Dataset_Title><Dataset_Release_Date>2009-10-09</Dataset_Release_Date><Dataset_Release_Place>Boulder, Colorado USA</Dataset_Release_Place><Dataset_Publisher>NSIDC: National Snow and Ice Data Center</Dataset_Publisher><Version>1</Version><Other_Citation_Details><Invert_Citation_Order>false</Invert_Citation_Order></Other_Citation_Details><Dataset_DOI>10.7265/N51V5BW9</Dataset_DOI><Online_Resource>https://dx.doi.org/10.7265/N51V5BW9</Online_Resource><Dataset_Series_Name>G02171</Dataset_Series_Name></Data_Set_Citation><Personnel><Role>Technical Contact</Role><First_Name>NSIDC</First_Name><Last_Name>User Services</Last_Name><Email>nsidc@nsidc.org</Email><Phone>1-303-492-6199</Phone><Fax>1-303-492-2468</Fax><Contact_Address><Address>CIRES, 449 UCB</Address><Address>University of Colorado</Address><City>Boulder</City><Province_or_State>CO</Province_or_State><Postal_Code>80309-0449</Postal_Code><Country>USA</Country></Contact_Address></Personnel><Personnel><Role>Investigator</Role><Last_Name>Canadian Ice Service</Last_Name><Contact_Address><Country/></Contact_Address></Personnel><Parameters><Category>EARTH SCIENCE</Category><Topic>CRYOSPHERE</Topic><Term>SEA ICE</Term><Variable_Level_1>SEA ICE CONCENTRATION</Variable_Level_1><Variable_Level_2> </Variable_Level_2><Variable_Level_3> </Variable_Level_3><Detailed_Variable> </Detailed_Variable></Parameters><ISO_Topic_Category>Climatology/Meteorology/Atmosphere</ISO_Topic_Category><Keyword>Arctic</Keyword><Keyword>Arctic Ocean</Keyword><Keyword>Arctic Ocean Basin</Keyword><Keyword>Arctic Sea Ice</Keyword><Keyword>Canadian Arctic</Keyword><Keyword>Canadian Ice Service</Keyword><Keyword>Great Lakes</Keyword><Keyword>Ice Chart</Keyword><Keyword>Ice Concentration</Keyword><Keyword>Ice Form</Keyword><Keyword>Sea Ice</Keyword><Keyword>Sea Ice Concentration</Keyword><Keyword>Sea Ice Form</Keyword><Keyword>Sea Ice Prediction Network-project</Keyword><Keyword>Sea Ice Stage Of Development</Keyword><Keyword>SIPN ice thickness-project</Keyword><Keyword>SIPN-project</Keyword><Keyword>SIPN sea ice-project</Keyword><Keyword>Stage Of Development</Keyword><Sensor_Name><Short_Name>VISIBLE SPECTROMETER</Short_Name></Sensor_Name><Sensor_Name><Short_Name>VISUAL OBSERVATIONS</Short_Name><Long_Name>VISUAL OBSERVATIONS</Long_Name></Sensor_Name><Source_Name><Short_Name>AIRCRAFT</Short_Name><Long_Name>AIRCRAFT</Long_Name></Source_Name><Source_Name><Short_Name>SATELLITES</Short_Name><Long_Name>SATELLITES</Long_Name></Source_Name><Source_Name><Short_Name>SHIPS</Short_Name></Source_Name><Temporal_Coverage><Start_Date>2006-01-01</Start_Date></Temporal_Coverage><Data_Set_Progress>active</Data_Set_Progress><Spatial_Coverage><Southernmost_Latitude>39.52777</Southernmost_Latitude><Northernmost_Latitude>83.19372</Northernmost_Latitude><Westernmost_Longitude>-164.05002</Westernmost_Longitude><Easternmost_Longitude>21.96925</Easternmost_Longitude></Spatial_Coverage><Location><Location_Category>Ocean</Location_Category><Location_Type>Arctic Ocean</Location_Type><Location_Subregion1/><Location_Subregion2/><Location_Subregion3/><Detailed_Location/></Location><Location><Location_Category>Continent</Location_Category><Location_Type>North America</Location_Type><Location_Subregion1>Canada</Location_Subregion1><Location_Subregion2>Hudson Bay</Location_Subregion2><Location_Subregion3/><Detailed_Location/></Location><Location><Location_Category>Continent</Location_Category><Location_Type>North America</Location_Type><Location_Subregion1>Canada</Location_Subregion1><Location_Subregion2>Great Lakes, Canada</Location_Subregion2><Location_Subregion3/><Detailed_Location/></Location><Data_Resolution><Latitude_Resolution>Not applicable</Latitude_Resolution><Longitude_Resolution>Not applicable</Longitude_Resolution><Temporal_Resolution>7 day</Temporal_Resolution></Data_Resolution><Quality>The reliability and accuracy of the data set is directly related to the availability, resolution and the effects of atmospheric (cloud, daylight, etc.) and ground (snow, rain, sea state, etc.) conditions on the source information. The source information is incorporated in the Regional Ice Analysis if the source information publication or acquisition date is plus or minus 3 days of the Regional Ice Analysis publication date. The only exception is the Regional Ice Analysis source information where we use the previous publication date.</Quality><Access_Constraints>These data are freely, openly, and fully accessible without restrictions.</Access_Constraints><Use_Constraints>These data are freely, openly, and fully available to use without restrictions, provided that you cite the data according to the recommended citation at https://nsidc.org/about/use_copyright.html.</Use_Constraints><Data_Set_Language>English</Data_Set_Language><Data_Center><Data_Center_Name><Short_Name>NOAA</Short_Name><Long_Name>National Oceanic and Atmospheric Administration</Long_Name></Data_Center_Name><Data_Center_URL>http://nsidc.org/noaa/</Data_Center_URL><Personnel><Role>Data Center Contact</Role><First_Name>NOAA</First_Name><Last_Name>User Services</Last_Name><Email>nsidc@nsidc.org</Email><Phone>1-303-492-6199</Phone><Fax>1-303-492-2468</Fax><Contact_Address><Address>National Snow and Ice Data Center</Address><Address>CIRES, 449 UCB</Address><Address>University of Colorado</Address><City>Boulder</City><Province_or_State>CO</Province_or_State><Postal_Code>80309-0449</Postal_Code><Country>USA</Country></Contact_Address></Personnel></Data_Center><Distribution><Distribution_Media>FTP</Distribution_Media><Distribution_Size>0.3 - 4.2 MB</Distribution_Size><Distribution_Format>XML</Distribution_Format></Distribution><Distribution><Distribution_Media>FTP</Distribution_Media><Distribution_Size>0.3 - 4.2 MB</Distribution_Size><Distribution_Format>Shapefile</Distribution_Format></Distribution><Reference>Canadian Ice Service. 2006. Canadian Ice Service SIGRID-3 Implementation 2006. Environment Canada, 14 pp.

Environment Canada. 2005. Manual of Standard Procedures for Observing and Reporting Ice Conditions (MANICE). Issuing authority: Assistant Deputy Minister, Meteorological Service of Canada: http://www.ec.gc.ca/glaces-ice/default.asp?lang=En&amp;n=08D7D137-1.

 Intergovernmental Oceanographic Commission of UNESCO. 2004. SIGRID-3: A Vector Archive Format for Sea Ice Charts. JCOMM Technical Report No. 23, WMO/TD-No. 1214.

Kokaly, R. F. 1996. Methods for Regridding AARI Data in SIGRID Format to the EASE-Grid Projection. NSIDC Special Report 9. Boulder, Colorado USA: National Snow and Ice Data Center.

National Ice Center. 2006. National Ice Center Arctic Sea Ice Charts and Climatologies in Gridded Format. Edited and compiled by F. Fetterer and C. Fowler. Boulder, Colorado USA: National Snow and Ice Data Center. Digital media. 
Thompson, T. 1981. Proposed Format for Gridded Sea Ice Information (SIGRID). World Meteorological Organization, Geneva, Report, World Climate Program, 28 pp.</Reference><Summary><Abstract>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 begin in 2006 and cover 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. All data are available via FTP.</Abstract></Summary><Related_URL><URL_Content_Type><Type>VIEW RELATED INFORMATION</Type></URL_Content_Type><URL>https://dx.doi.org/10.7265/N51V5BW9</URL><Description>Documentation</Description></Related_URL><Related_URL><URL_Content_Type><Type>GET DATA</Type></URL_Content_Type><URL>https://noaadata.apps.nsidc.org/NOAA/G02171/</URL><Description>HTTPS</Description></Related_URL><Related_URL><URL_Content_Type><Type>VIEW RELATED INFORMATION</Type></URL_Content_Type><URL>http://nsidc.org/data/g00799.html</URL><Description>Arctic and Southern Ocean Sea Ice Concentrations</Description></Related_URL><Related_URL><URL_Content_Type><Type>VIEW RELATED INFORMATION</Type></URL_Content_Type><URL>http://nsidc.org/data/g01962.html</URL><Description>Environmental Working Group Joint U.S.-Russian Arctic Sea Ice Atlas</Description></Related_URL><Related_URL><URL_Content_Type><Type>VIEW RELATED INFORMATION</Type></URL_Content_Type><URL>http://nsidc.org/data/g02172.html</URL><Description>National Ice Center Arctic Sea Ice Charts and Climatologies in Gridded Format</Description></Related_URL><Related_URL><URL_Content_Type><Type>VIEW RELATED INFORMATION</Type></URL_Content_Type><URL>http://nsidc.org/data/g02176.html</URL><Description>Sea Ice Charts of the Russian Arctic in Gridded Format, 1933-2006</Description></Related_URL><Related_URL><URL_Content_Type><Type>VIEW RELATED INFORMATION</Type></URL_Content_Type><URL>http://nsidc.org/data/g01111.html</URL><Description>The Dehn Collection of Arctic Sea Ice Charts, 1953-1986</Description></Related_URL><Metadata_Name>CEOS IDN DIF</Metadata_Name><Metadata_Version>VERSION 9.9</Metadata_Version><DIF_Creation_Date>2009-10-09</DIF_Creation_Date><Last_DIF_Revision_Date>2025-12-03</Last_DIF_Revision_Date><Extended_Metadata><Metadata><Group>NSIDC</Group><Name>Version Summary</Name><Value/></Metadata><Metadata><Group>NSIDC</Group><Name>Minor Version</Name><Value/></Metadata><Metadata><Group>NSIDC</Group><Name>Current Version</Name><Value>1</Value></Metadata><Metadata><Group>NSIDC</Group><Name>Level of Service</Name><Value><Level>Comprehensive</Level></Value></Metadata><Metadata><Group>NSIDC</Group><Name>Full Dataset Citation</Name><Value>Canadian Ice Service. (2009). &lt;i&gt;Canadian Ice Service Arctic Regional Sea Ice Charts in SIGRID-3 Format&lt;/i&gt;. (G02171, Version 1). [Data Set]. Boulder, Colorado USA. National Snow and Ice Data Center. &lt;a href="https://doi.org/10.7265/N51V5BW9"&gt;https://doi.org/10.7265/N51V5BW9&lt;/a&gt;. 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