Make A Graph

Dataset Title:	Polar Stereographic Grid Cell Area Values of 25km gridded data sets , Polar Stereographic (North), Ancillary Data
Institution:	NASA National Snow and Ice Data Center Distributed Active Archive Center (Dataset ID: pstere_gridcell_N25k)
Information:	Summary \| License \| ISO 19115 \| Metadata \| Background \| Data Access Form \| Files

To work correctly, this web page requires that JavaScript be enabled in your browser. Please:
1) Enable JavaScript in your browser:
      • Chrome: "Settings : Advanced : Privacy and security : Site Settings : JavaScript"
      • Firefox: (it should be always on!)"
      • Opera: "Settings : Websites : JavaScript"
      • Safari: "Safari : Preferences : Security : Enable JavaScript"
2) Reload this web page.

Graph Type:
X Axis:
Y Axis:
Color:

Dimensions

Start

Stop

y (meters)

x (meters)

Graph Settings
Color Bar:	Continuity:	Scale:
Minimum:	Maximum:	N Sections:
Y Axis Minimum:	Maximum:

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

Optional:
Then set the File Type: (File Type information)
and

or view the URL:
(Documentation / Bypass this form

)

[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 {
  y {
    Float64 actual_range -5337500.0, 5837500.0;
    String axis "Y";
    String ioos_category "Location";
    String long_name "y coordinate of projection";
    String standard_name "projection_y_coordinate";
    String units "meters";
    Float64 valid_range -5350000.0, 5850000.0;
  }
  x {
    Float64 actual_range -3837500.0, 3737500.0;
    String axis "X";
    String ioos_category "Location";
    String long_name "x coordinate of projection";
    String standard_name "projection_x_coordinate";
    String units "meters";
    Float64 valid_range -3850000.0, 3750000.0;
  }
  cell_area {
    Float64 colorBarMaximum 7.0e+8;
    Float64 colorBarMinimum 3.0e+8;
    String comment "Surface area of grid cell";
    String coverage_content_type "image";
    String ioos_category "Unknown";
    String long_name "Grid Cell area";
    Float64 missing_value -999.0;
    String standard_name "cell_area";
    String units "meters^2";
    Float64 valid_range 3.82658853953166e+8, 6.644483028171387e+8;
  }
  NC_GLOBAL {
    String acknowledgement "These data are produced and supported by the NASA National Snow and Ice Data Center Distributed Active Archive Center.";
    String cdm_data_type "Grid";
    String contributor_name "J. Scott Stewart, Walter N. Meier, Donna J. Scott";
    String contributor_role "Scientific Programmer, Project Scientist, Project Lead";
    String Conventions "CF-1.6, ACDD-1.3, COARDS";
    String creator_name "NASA National Snow and Ice Data Center Distributed Active Archive Center";
    String creator_type "group";
    String creator_url "https://www.nasa.gov/";
    String date_created "2022-03-21";
    String date_metadata_modified "2022-03-21";
    String date_modified "2022-03-21";
    String geospatial_bounds "POLYGON ((-3850000 5850000, 3750000 5850000, 3750000 -5350000, -3850000 -5350000, -3850000 5850000))";
    String geospatial_bounds_crs "EPSG:3411";
    String geospatial_x_resolution "25000 meters";
    String geospatial_x_units "meters";
    String geospatial_y_resolution "25000 meters";
    String geospatial_y_units "meters";
    String grid_mapping_crs_wkt "PROJCS[\"NSIDC Sea Ice Polar Stereographic North\",GEOGCS[\"Unspecified datum based upon the Hughes 1980 ellipsoid\",DATUM[\"Not_specified_based_on_Hughes_1980_ellipsoid\",SPHEROID[\"Hughes 1980\",6378273,298.279411123061,AUTHORITY[\"EPSG\",\"7058\"]],AUTHORITY[\"EPSG\",\"6054\"]],PRIMEM[\"Greenwich\",0,AUTHORITY[\"EPSG\",\"8901\"]],UNIT[\"degree\",0.0174532925199433,AUTHORITY[\"EPSG\",\"9122\"]],AUTHORITY[\"EPSG\",\"4054\"]],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\",\"3411\"]]";
    Float64 grid_mapping_false_easting 0.0;
    Float64 grid_mapping_false_northing 0.0;
    String grid_mapping_GeoTransform "-3850000 25000 0 5850000 0 -25000";
    Float64 grid_mapping_inverse_flattening 298.279411123064;
    Float64 grid_mapping_latitude_of_projection_origin 90.0;
    String grid_mapping_long_name "NSIDC_NH_PolarStereo_25km";
    Float64 grid_mapping_longitude_of_prime_meridian 0.0;
    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 +a=6378273 +b=6356889.449 +units=m +no_defs";
    Float64 grid_mapping_semi_major_axis 6378273.0;
    String grid_mapping_spatial_ref "PROJCS[\"NSIDC Sea Ice Polar Stereographic North\",GEOGCS[\"Unspecified datum based upon the Hughes 1980 ellipsoid\",DATUM[\"Not_specified_based_on_Hughes_1980_ellipsoid\",SPHEROID[\"Hughes 1980\",6378273,298.279411123061,AUTHORITY[\"EPSG\",\"7058\"]],AUTHORITY[\"EPSG\",\"6054\"]],PRIMEM[\"Greenwich\",0,AUTHORITY[\"EPSG\",\"8901\"]],UNIT[\"degree\",0.0174532925199433,AUTHORITY[\"EPSG\",\"9122\"]],AUTHORITY[\"EPSG\",\"4054\"]],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\",\"3411\"]]";
    String grid_mapping_srid "urn:ogc:def:crs:EPSG::3411";
    Float64 grid_mapping_standard_parallel 70.0;
    Float64 grid_mapping_straight_vertical_longitude_from_pole -45.0;
    String history 
"2026-01-24T18:07:35Z (local files)
2026-01-24T18:07:35Z https://polarwatch.noaa.gov/griddap/pstere_gridcell_N25k.das";
    String id "10.5067/N6INPBT8Y104";
    String infoUrl "https://doi.org/10.5067/N6INPBT8Y104";
    String institution "NASA National Snow and Ice Data Center Distributed Active Archive Center";
    String keywords "active, analysis, ancillary, archive, area, cell, cell_area, center, data, distributed, earth, EARTH SCIENCE SERVICES > DATA ANALYSIS AND VISUALIZATION > GEOGRAPHIC INFORMATION SYSTEMS, geographic, grid, ice, information, nasa, national, nsidc, polar, science, services, snow, stereo, systems, visualization";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "Access Constraint: These data are freely, openly, and fully accessible, provided that you are logged into your NASA Earthdata profile (https://urs.earthdata.nasa.gov/);  Use Constraint: 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. For more information on the NASA EOSDIS Data Use Policy, see https://earthdata.nasa.gov/earth-observation-data/data-use-policy.";
    String metadata_link "https://doi.org/10.5067/N6INPBT8Y104";
    String naming_authority "org.doi.dx";
    String product_version "1.0";
    String program "NASA Earth Science Data and Information System (ESDIS)";
    String publisher_email "nsidc@nsidc.org";
    String publisher_institution "National Snow and Ice Data Center; Cooperative Institute for Research in Environmental Sciences; University of Colorado at Boulder; Boulder, CO";
    String publisher_name "NASA National Snow and Ice Data Center Distributed Active Archive Center";
    String publisher_type "institution";
    String publisher_url "https://nsidc.org/daac";
    String sourceUrl "(local files)";
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "This data set provides the total on-Earth surface area values at the center of each grid cell of 25km polar stereographic gridded data sets (North) distributed by The National Snow and Ice Data Center";
    String title "Polar Stereographic Grid Cell Area Values of 25km gridded data sets , Polar Stereographic (North), Ancillary Data";
  }
}

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.