National Oceanic and Atmospheric Administration CoastWatch Program

NOAA CoastWatch
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Dataset Title:	Latitude and Longitude Grids Corresponding to Y-Grids and X-Grids in EASE-2 Projection Used in NESDIS Sea Ice Data Products, Arctic, 1km, UW-CIMSS
Institution:	NOAA NESDIS PolarWatch (Dataset ID: nesdis_ease2_latlon_nhem_1k)
Information:	Summary \| License \| Metadata \| Background \| Data Access Form \| Files

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Graph Type:
X Axis:
Y Axis:
Color:

Dimensions

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Stop

rows (meters)

cols (meters)

specify just 1 value →

Graph Settings

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Size:

Color:

Color Bar:

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

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Then set the File Type: (File Type information)
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[The graph you specified. Please be patient.]

Things You Can Do With Your Graphs

Well, you can do anything you want with your graphs, of course. But some things you might not have considered are:

Web page authors can embed a graph of the latest data in a web page using HTML <img> tags.
Anyone can use ERDDAPs Slide Sorter to build a personal web page that displays graphs with the latest data (or other images or HTML content), each in its own, draggable slide.

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  rows {
    String _CoordinateAxisType "GeoY";
    Int32 actual_range -4512000, 4511000;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Northing of Pixel Centers";
    String standard_name "projection_y_coordinate";
    String units "meters";
  }
  cols {
    String _CoordinateAxisType "GeoX";
    Int32 actual_range -4512000, 4511000;
    String axis "X";
    String ioos_category "Location";
    String long_name "Easting of Pixel Centers";
    String standard_name "projection_x_coordinate";
    String units "meters";
  }
  latitude {
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String comment "latitude of EASE2 Grid 1km resolution in the polar regions, Arctic (9024, 9024), Antarctic (8024, 8024)";
    String coverage_content_type "coordinate";
    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 comment "longitude of EASE2 Grid 1km resolution in the polar regions, Arctic (9024,9024), Antarctic (8024, 8024)";
    String coverage_content_type "coordinate";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  NC_GLOBAL {
    String _NCProperties "version=2,netcdf=4.8.1,hdf5=1.10.7";
    String cdm_data_type "Grid";
    String Conventions "COARDS, CF-1.10, ACDD-1.3";
    String creator_email "NESDIS.Data.Access@noaa.gov";
    String creator_name "NOAA NESDIS";
    String creator_type "institution";
    String creator_url "https://www.nesdis.noaa.gov/";
    String grid_mapping_comment "Data is stored in 1 km EASE2-Grid. Refer to https://nsidc.org/data/user-resources/help-center/guide-ease-grids";
    Float32 grid_mapping_earth_radius 6371228.0;
    String grid_mapping_epsg_code "6931";
    Float32 grid_mapping_false_easting 0.0;
    Float32 grid_mapping_false_northing 0.0;
    Float32 grid_mapping_latitude_of_projection_origin 90.0;
    Float32 grid_mapping_longitude_of_projection_origin 0.0;
    String grid_mapping_name "lambert_azimuthal_equal_area";
    String grid_mapping_proj4_params "WGS84";
    String grid_mapping_proj4text "+proj=laea +lat_0=90 +lon_0=0 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs +type=crs";
    String grid_mapping_spatial_ref "PROJCS[\"WGS 84 / NSIDC EASE-Grid 2.0 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[\"Lambert_Azimuthal_Equal_Area\"],PARAMETER[\"latitude_of_center\",90],PARAMETER[\"longitude_of_center\",0],PARAMETER[\"false_easting\",0],PARAMETER[\"false_northing\",0],UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],AUTHORITY[\"EPSG\",\"6931\"]]";
    String grid_mapping_srid "urn:ogc:def:crs:EPSG::6931";
    String history 
"2026-07-13T10:25:59Z (local files)
2026-07-13T10:25:59Z https://coastwatch.noaa.gov/griddap/nesdis_ease2_latlon_nhem_1k.das";
    String infoUrl "https://www.nesdis.noaa.gov/";
    String institution "NOAA NESDIS PolarWatch";
    String keywords "cols, data, environmental, information, latitude, local, longitude, national, nesdis, noaa, rows, satellite, service, source";
    String license "These data may be redistributed and used without restriction.";
    String sourceUrl "(local files)";
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "This dataset includes latitude and longitude grids that correspond to the Y-grid and X-grid used in the NESDIS sea ice products in the Arctic. Presented in the EASE-2 (Equal-Area Scalable Earth-2) projection at a 1km resolution, this dataset serves as ancillary data to the sea ice data products in the same projection.\"";
    String title "Latitude and Longitude Grids Corresponding to Y-Grids and X-Grids in EASE-2 Projection Used in NESDIS Sea Ice Data Products, Arctic, 1km, UW-CIMSS";
  }
}

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.

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