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| Grid DAP Data | Sub- set | Table DAP Data | Make A Graph | W M S | Source Data Files | Acces- sible
| Title | Sum- mary | FGDC, ISO, Metadata | Back- ground Info | RSS | E | Institution | Dataset ID |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| data | graph | files | public | IMS Snow and Ice Analysis, Arctic, 4km, 2004 - Present, Daily |
| M | background
| 
| 
| USNIC | usnic_ims_4km |
| Row Type | Variable Name | Attribute Name | Data Type | Value |
|---|---|---|---|---|
| attribute | NC_GLOBAL | _NCProperties | String | version=2,netcdf=4.6.2,hdf5=1.10.4 |
| attribute | NC_GLOBAL | acknowledgement | String | Produced at USNIC with support from NOAA NESDIS STAR. |
| attribute | NC_GLOBAL | cdm_data_type | String | Grid |
| attribute | NC_GLOBAL | comment | String | The IMS product has changed versions and resolutions over time. As of date_created, the product is available in three resolutions: 1 km, 4 km, and 24 km. Version 1 had a 24 km resolution from 04 Feb 1997 - 22 Feb 2004. Version 2 added a 4 km resolution to the product on 23 Feb 2004. Finally, Version 3 added a 1 km product on 02 Dec 2014. IMS products are also available through the creator_url and the publisher_url in additional formats such as ASCII, GeoTIFF, and GRIB2. Though the IMS is housed at the USNIC and originated with NOAA Center for Satellite Applications and Research (STAR), a number of additional organizations including NOAA's Ocean Prediction Center, Office of Satellite and Product Operations, Meteorological Development Laboratory, and NOAA@NSIDC contribute to IMS' current development, support, production, and archival. For more information, refer to https://nsidc.org/data/g02156. Note that the latitude and longitude for the NetCDF files are in separate NetCDF files also available from https://nsidc.org/data/g02156. |
| attribute | NC_GLOBAL | contributor_name | String | U.S. National Ice Center, NOAA at NSIDC, NOAA PolarWatch, NOAA MDL, NOAA STAR |
| attribute | NC_GLOBAL | contributor_role | String | Producer, Publisher, Advisor, Software Developer, Originator |
| attribute | NC_GLOBAL | Conventions | String | CF-1.6, ACDD-1.3, COARDS |
| attribute | NC_GLOBAL | creator_email | String | nic.ims.analysts at noaa.gov |
| attribute | NC_GLOBAL | creator_institution | String | U.S. National Ice Center (USNIC) |
| attribute | NC_GLOBAL | creator_name | String | U.S. National Ice Center (USNIC) |
| attribute | NC_GLOBAL | creator_type | String | institution |
| attribute | NC_GLOBAL | creator_url | String | https://usicecenter.gov/ |
| attribute | NC_GLOBAL | date_created | String | 2024-06-08T00:33:11Z |
| attribute | NC_GLOBAL | defaultGraphQuery | String | IMS_Surface_Values[(last)][(-4498000.0):(4500000.0)][(-4498000.0):(4500000.0)]&.draw=surface&.vars=x%7Cy%7CIMS_Surface_Values&.colorBar=%7C%7C%7C%7C%7C&.bgColor=0xffccccff |
| attribute | NC_GLOBAL | grid_mapping_false_easting | double | 0.0 |
| attribute | NC_GLOBAL | grid_mapping_false_northing | double | 0.0 |
| attribute | NC_GLOBAL | grid_mapping_latitude_of_projection_origin | double | 90.0 |
| attribute | NC_GLOBAL | grid_mapping_name | String | polar_stereographic |
| attribute | NC_GLOBAL | grid_mapping_proj4 | String | +proj=stere +lat_0=90 +lat_ts=60 +lon_0=-80 +k=1 +x_0=0 +y_0=0 +a=6378137 +b=6356257 +units=m +no_defs |
| attribute | NC_GLOBAL | grid_mapping_semi_major_axis | double | 6378137.0 |
| attribute | NC_GLOBAL | grid_mapping_semi_minor_axis | double | 6356257.0 |
| attribute | NC_GLOBAL | grid_mapping_spatial_ref | String | PROJCS["unknown",GEOGCS["unknown",DATUM["unknown",SPHEROID["unknown",6378137,291.505347349177]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]]],PROJECTION["Polar_Stereographic"],PARAMETER["latitude_of_origin",60],PARAMETER["central_meridian",-80],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",SOUTH],AXIS["Northing",SOUTH]] |
| attribute | NC_GLOBAL | grid_mapping_standard_parallel | double | 60.0 |
| attribute | NC_GLOBAL | grid_mapping_straight_vertical_longitude_from_pole | double | -80.0 |
| attribute | NC_GLOBAL | grid_mapping_units | String | m |
| attribute | NC_GLOBAL | history | String | 08 June 2024 00:33Z: NetCDF file generated from file NIC.IMS_v3_202416000_4km.asc |
| attribute | NC_GLOBAL | id | String | G02156 |
| attribute | NC_GLOBAL | infoUrl | String | https://nsidc.org/data/G02156 |
| attribute | NC_GLOBAL | institution | String | USNIC |
| attribute | NC_GLOBAL | instrument | String | See https://nsidc.org/data/g02156 for a list of instruments |
| attribute | NC_GLOBAL | keywords | String | Earth Science > Cryosphere > Sea Ice > Ice Extent, Earth Science > Cryosphere > Snow/Ice > Snow Cover, environmental, extent, geographic, GEOGRAPHIC REGION > ARCTIC, GEOGRAPHIC REGION > NORTHERN HEMISPHERE, GEOGRAPHIC REGION > POLAR |
| attribute | NC_GLOBAL | keywords_vocabulary | String | GCMD Science Keywords |
| attribute | NC_GLOBAL | license | String | These data may be redistributed and used without restriction. |
| attribute | NC_GLOBAL | metadata_link | String | https://nsidc.org/data/G02156 |
| attribute | NC_GLOBAL | naming_authority | String | org.nsidc |
| attribute | NC_GLOBAL | platform | String | Earth Observation Satellites, In Situ Land-based Platforms, In Situ Ocean-based Platforms, Ground Stations, Maps/Charts/Photographs, Models/Analyses |
| attribute | NC_GLOBAL | platform_vocabulary | String | NASA Global Change Master Directory (GCMD) Keywords, Version 9.0 |
| attribute | NC_GLOBAL | processing_level | String | NOAA Level 4 |
| attribute | NC_GLOBAL | product_version | String | Version 3 |
| attribute | NC_GLOBAL | proj_crs_code | String | usnic_ims_nh |
| attribute | NC_GLOBAL | proj_crs_code_description | String | The proj_crs_code attribute references a registered projection identifier (i.e. EPSG) when available. If the projection is not registered, non-standard then this attribute references a PolarWatch assigned internal identifier. |
| attribute | NC_GLOBAL | project | String | USNIC Snow and Ice Products |
| attribute | NC_GLOBAL | publisher_email | String | nsidc at nsidc.org |
| attribute | NC_GLOBAL | publisher_institution | String | National Snow and Ice Data Center |
| attribute | NC_GLOBAL | publisher_name | String | National Snow and Ice Data Center |
| attribute | NC_GLOBAL | publisher_type | String | institution |
| attribute | NC_GLOBAL | publisher_url | String | https://nsidc.org/ |
| attribute | NC_GLOBAL | references | String | Ramsay, B. H. (1998). The interactive multisensor snow and ice mapping system. Hydrological Processes, 12(10-11), 1537-1546.; Helfrich, S. R., McNamara, D., Ramsay, B. H., Baldwin, T., & Kasheta, T. (2007). Enhancements to, and forthcoming developments in the Interactive Multisensor Snow and Ice Mapping System (IMS). Hydrological Processes: An International Journal, 21(12), 1576-1586. doi: https://doi.org/10.1002/hyp.6720.; Helfrich, S. R., M. Li, C. Kongoli, L. Nagdimunov, and E. Rodriguez. 2019. Interactive Multisensor Snow and Ice Mapping System Version 3 (IMS V3) - Algorithm Theoretical Basis Document Version 2.5. NOAA NESDIS Center for Satellite Applications and Research (STAR). 74 pp.; U.S. National Ice Center. (2008, updated daily). IMS Daily Northern Hemisphere Snow and Ice Analysis at 1 km, 4 km, and 24 km Resolutions, Version 1. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. doi: https://doi.org/10.7265/N52R3PMC. |
| attribute | NC_GLOBAL | source | String | Analysts at the United States National Ice Center (USNIC) interactively create this product using a variety of data from many sources including in-situ, remote sensing, and modeled data sources. A description of the IMS system is available at: https://nsidc.org/data/g02156 |
| attribute | NC_GLOBAL | sourceUrl | String | (local files) |
| attribute | NC_GLOBAL | standard_name_vocabulary | String | CF Standard Name Table v70 |
| attribute | NC_GLOBAL | summary | String | This file contains a map of snow cover and ice cover for the Northern Hemisphere produced by the Interactive Multisensor Snow and Ice Mapping System (IMS). The map is nowcasted to be valid at the moment specified by the time variable. The input data used to generate the map originates between the time_coverage_start and time_coverage_end global attributes. Analysts at the United States National Ice Center (USNIC) use a variety of geostationary and polar orbiting satellite imagery, derived products, in situ, and other data sources to interactively create the map. The system has produced daily analyses from February 1997 to Dec 2014, and twice daily analyses since. |
| attribute | NC_GLOBAL | testOutOfDate | String | now-4days |
| attribute | NC_GLOBAL | time_coverage_duration | String | P1D |
| attribute | NC_GLOBAL | time_coverage_end | String | 2024-11-20T01:00:00Z |
| attribute | NC_GLOBAL | time_coverage_resolution | String | P1D |
| attribute | NC_GLOBAL | time_coverage_start | String | 2004-02-25T00:00:00Z |
| attribute | NC_GLOBAL | title | String | IMS Snow and Ice Analysis, Arctic, 4km, 2004 - Present, Daily |
| dimension | time | double | nValues=7450, evenlySpaced=false, averageSpacing=1 day 0h 24m 10s | |
| attribute | time | _CoordinateAxisType | String | Time |
| attribute | time | actual_range | double | 1.0776672E9, 1.7320644E9 |
| attribute | time | axis | String | T |
| attribute | time | comment | String | This is the 00Z reference time. Note that products are nowcasted to be valid specifically at the time given here. |
| attribute | time | CoordinateAxisType | String | Time |
| attribute | time | ioos_category | String | Time |
| attribute | time | long_name | String | Centered Time |
| attribute | time | standard_name | String | time |
| attribute | time | time_origin | String | 01-JAN-1970 00:00:00 |
| attribute | time | units | String | seconds since 1970-01-01T00:00:00Z |
| dimension | y | float | nValues=6144, evenlySpaced=true, averageSpacing=4000.0 | |
| attribute | y | actual_range | float | -1.2286E7, 1.2286E7 |
| attribute | y | axis | String | Y |
| attribute | y | comment | String | y values are the centers of the grid cells |
| attribute | y | ioos_category | String | Location |
| attribute | y | long_name | String | y coordinate of projection |
| attribute | y | standard_name | String | projection_y_coordinate |
| attribute | y | units | String | m |
| dimension | x | float | nValues=6144, evenlySpaced=true, averageSpacing=4000.0 | |
| attribute | x | actual_range | float | -1.2286E7, 1.2286E7 |
| attribute | x | axis | String | X |
| attribute | x | comment | String | x values are the centers of the grid cells |
| attribute | x | ioos_category | String | Location |
| attribute | x | long_name | String | x coordinate of projection |
| attribute | x | standard_name | String | projection_x_coordinate |
| attribute | x | units | String | m |
| variable | IMS_Surface_Values | byte | time, y, x | |
| attribute | IMS_Surface_Values | _FillValue | byte | 0 |
| attribute | IMS_Surface_Values | colorBarContinuous | String | false |
| attribute | IMS_Surface_Values | colorBarMaximum | double | 4.5 |
| attribute | IMS_Surface_Values | colorBarMinimum | double | -0.5 |
| attribute | IMS_Surface_Values | colorBarNSections | String | 5 |
| attribute | IMS_Surface_Values | comment | String | 0: Outside Coverage Area, 1: Open Water, 2: Land Without Snow, 3: Sea Ice or Lake Ice, 4: Snow Covered Land |
| attribute | IMS_Surface_Values | flag_meanings | String | outside_coverage_area open_water snow_free_land lake_ice_or_sea_ice ice_and_snow_on_land |
| attribute | IMS_Surface_Values | flag_values | byte | 0, 1, 2, 3, 4 |
| attribute | IMS_Surface_Values | ioos_category | String | Ice Distribution |
| attribute | IMS_Surface_Values | long_name | String | IMS maps of 0: no data, 1:open water, 2:land, 3:sea/lake ice, 4:snow cover for the Northern Hemisphere |
| attribute | IMS_Surface_Values | short_name | String | IMS Surface Values |
| attribute | IMS_Surface_Values | standard_name | String | area_type |
The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.