Data Access Form

Dataset Title:	Sea Ice Grid for AMSR-2 products from NOAA CoastWatch, Arctic, 10km
Institution:	DOC/NOAA/NESDIS/OSPO > Office of Satellite and Product Operations, NESDIS, NOAA (Dataset ID: noaacwAMSR2gw1IceNP06_Grid)
Information:	Summary \| License \| Metadata \| Background \| Make a graph

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Dimensions	Size	Spacing
rows (m)	1778	-9937.5 (even)

cols (m)	1778	9937.5 (even)

Grid Variables (which always also download all of the dimension variables)

latitude (degrees_north)

longitude (degrees_east)

File type: (more information)

(Documentation / Bypass this form)

(Please be patient. It may take a while to get the data.)

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  rows {
    Float64 actual_range -8829468.75, 8829468.75;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Northing of Pixel Centers";
    String standard_name "projection_y_coordinate";
    String units "m";
  }
  cols {
    Float64 actual_range -8829468.75, 8829468.75;
    String axis "X";
    String ioos_category "Location";
    String long_name "Easting of Pixel Centers";
    String standard_name "projection_x_coordinate";
    String units "m";
  }
  latitude {
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String Conventions "CF-1.6, COARDS, ACDD-1.3";
    String creator_email "espcoperations@noaa.gov";
    String creator_name "DOC/NOAA/NESDIS/STAR > IOSSPDT Algorithm Team, Center for Satellite   Applications and Research, NESDIS, NOAA, U.S. Department of Commerce";
    String creator_type "group";
    String creator_url "http://www.star.nesdis.noaa.gov";
    String crs_wkt "PROJCS[\"WGS 84 / NSIDC Sea Ice Polar Stereographic North\",GEOGCS[\"WGS 84\",DATUM[\"WGS_1984\",SPHEROID[\"WGS 84\",6378137,298.257223563,AUTHORITY[\"EPSG\",\"7030\"]],AUTHORITY[\"EPSG\",\"6326\"]],PRIMEM[\"Greenwich\",0,AUTHORITY[\"EPSG\",\"8901\"]],UNIT[\"degree\",0.0174532925199433,AUTHORITY[\"EPSG\",\"9122\"]],AUTHORITY[\"EPSG\",\"4326\"]],PROJECTION[\"Polar_Stereographic\"],PARAMETER[\"latitude_of_origin\",70],PARAMETER[\"central_meridian\",-45],PARAMETER[\"scale_factor\",1],PARAMETER[\"false_easting\",0],PARAMETER[\"false_northing\",0],UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],AXIS[\"X\",EAST],AXIS[\"Y\",NORTH],AUTHORITY[\"EPSG\",\"3413\"]]";
    String cw_pass_type "day/night";
    Float64 cw_polygon_latitude -0.7268623651938858, 12.72124299521146, 18.906729375857534, 12.72124299521146, -0.7268623651938858, 12.72124299521146, 18.906729375857534, 12.72124299521146, -0.7268623651938858, 12.72124299521146, 18.906729375857534, 12.72124299521146, -0.7268623651938858, 12.72124299521146, 18.906729375857534, 12.72124299521146, -0.7268623651938858;
    Float64 cw_polygon_longitude -180.0, 161.565051177078, 135.0, 108.43494882292201, 90.0, 71.56505117707799, 45.0, 18.434948822922006, 0.0, -18.43494882292201, -45.0, -71.56505117707799, -90.0, -108.43494882292201, -135.0, -161.565051177078, -180.0;
    String cw_projection "Polar Stereographic";
    String cw_satellite "GCOM-W1";
    String cw_sensor "AMSR2";
    String date_created "2021-05-26T04:35:53Z";
    String geospatial_bounds "POLYGON((-180.0 -0.726862,161.565051 12.721243,135.0 18.906729,108.434949 12.721243,90.0 -0.726862,71.565051 12.721243,45.0 18.906729,18.434949 12.721243,0.0 -0.726862,-18.434949 12.721243,-45.0 18.906729,-71.565051 12.721243,-90.0 -0.726862,-108.434949 12.721243,-135.0 18.906729,-161.565051 12.721243,-180.0 -0.726862))";
    String grid_mapping_crs_wkt "PROJCS[\"WGS 84 / NSIDC Sea Ice Polar Stereographic North\",GEOGCS[\"WGS 84\",DATUM[\"WGS_1984\",SPHEROID[\"WGS 84\",6378137,298.257223563,AUTHORITY[\"EPSG\",\"7030\"]],AUTHORITY[\"EPSG\",\"6326\"]],PRIMEM[\"Greenwich\",0,AUTHORITY[\"EPSG\",\"8901\"]],UNIT[\"degree\",0.0174532925199433,AUTHORITY[\"EPSG\",\"9122\"]],AUTHORITY[\"EPSG\",\"4326\"]],PROJECTION[\"Polar_Stereographic\"],PARAMETER[\"latitude_of_origin\",70],PARAMETER[\"central_meridian\",-45],PARAMETER[\"scale_factor\",1],PARAMETER[\"false_easting\",0],PARAMETER[\"false_northing\",0],UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],AXIS[\"X\",EAST],AXIS[\"Y\",NORTH],AUTHORITY[\"EPSG\",\"3413\"]]";
    Float64 grid_mapping_false_easting 0.0;
    Float64 grid_mapping_false_northing 0.0;
    Float64 grid_mapping_inverse_flattening 298.257223563;
    Float64 grid_mapping_latitude_of_projection_origin 90.0;
    String grid_mapping_name "polar_stereographic";
    String grid_mapping_proj4text "+proj=stere +lat_0=90 +lat_ts=70 +lon_0=-45 +k=1 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs";
    Float64 grid_mapping_semi_major_axis 6378137.0;
    String grid_mapping_srid "EPSG:3413";
    Float64 grid_mapping_standard_parallel 70.0;
    Float64 grid_mapping_straight_vertical_longitude_from_pole -45.0;
    String history 
"2024-04-19T17:10:17Z https://www.star.nesdis.noaa.gov/thredds/dodsC/AMSR2gw1IceConcDailyAggNP06
2024-04-19T17:10:17Z https://polarwatch.noaa.gov/erddap/griddap/noaacwAMSR2gw1IceNP06_Grid.das";
    String infoUrl "https://www.star.nesdis.noaa.gov/thredds/dodsC/AMSR2gw1IceConcDailyAggNP06.html";
    String institution "DOC/NOAA/NESDIS/OSPO > Office of Satellite and Product Operations, NESDIS, NOAA";
    String instrument "AMSR2";
    String keywords "amsr2, amsr2gw1iceconcdailyaggnp06, cols, commerce, daily, data, day, department, doc, environmental, gcom, gcom-w1, iceconc, information, latitude, longitude, merge, national, nesdis, noaa, office, operations, osdpd, ospo, product, rows, satellite, service";
    String license 
"The data may be used and redistributed for free but is not intended
for legal use, since it may contain inaccuracies. Neither the data
Contributor, ERD, NOAA, nor the United States Government, nor any
of their employees or contractors, makes any warranty, express or
implied, including warranties of merchantability and fitness for a
particular purpose, or assumes any legal liability for the accuracy,
completeness, or usefulness, of this information.";
    String naming_authority "gov.noaa.nesdis.nde";
    String OBSERVED_PROPERTY "IceConc";
    String platform "GCOM-W1";
    String processing_level "NOAA Level 2 data";
    String proj4text "+proj=stere +lat_0=90 +lat_ts=70 +lon_0=-45 +k=1 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs";
    String project "NPP Data Exploitation: NOAA GCOM-W1 AMSR2";
    String publisher_email "espcoperations@noaa.gov";
    String publisher_name "DOC/NOAA/NESDIS/NDE > NPP Data Exploitation, Center for Satellite Applications and Research, NESDIS, NOAA, U.S. Department of Commerce";
    String publisher_type "group";
    String publisher_url "https://www.ospo.noaa.gov/";
    String source "GCOM-W1_AMSR2_IceConc";
    String sourceUrl "https://www.star.nesdis.noaa.gov/thredds/dodsC/AMSR2gw1IceConcDailyAggNP06";
    String srid "EPSG:3413";
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "GCOM Seaice Products. Department of Commerce (DOC)/NOAA/NESDIS/OSPO > Office of Satellite and Product Operations,     NESDIS, NOAA data from https://www.star.nesdis.noaa.gov/thredds/dodsC/AMSR2gw1IceConcDailyAggNP06.das .";
    String title "Sea Ice Grid for AMSR-2 products from NOAA CoastWatch, Arctic, 10km";
  }
}

Using griddap to Request Data and Graphs from Gridded Datasets

griddap lets you request a data subset, graph, or map from a gridded dataset (for example, sea surface temperature data from a satellite), via a specially formed URL. griddap uses the OPeNDAP (external link)

Data Access Protocol (DAP) (external link)

and its projection constraints (external link)

The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.

(easy) You can get data by using the dataset's Data Access Form. It makes the URL for you.
(easy) You can make a graph or map by using the dataset's Make A Graph form. It makes the URL for you.
(not hard) You can bypass the forms and get the data or make a graph or map by generating the URL by hand or with a computer program or script.

griddap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/griddap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/griddap/jplMURSST41.htmlTable?analysed_sst[(2002-06-01T09:00:00Z)][(-89.99):1000:(89.99)][(-179.99):1000:(180.0)]
Thus, the query is often a data variable name (e.g., analysed_sst), followed by [(start):stride:(stop)] (or a shorter variation of that) for each of the variable's dimensions (for example, [time][latitude][longitude]).

For details, see the griddap Documentation.