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Dataset Title:  Latitude and Longitude grids corresponding to ygrids and xgrids in EASE-2
Projection used in NESDIS sea ice data products. Antarctic, 1km, UW-CIMSS
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Institution:  Cooperative Institute for Meteorological Studies, University of Wisconsin at Madison   (Dataset ID: nesdis_ease2_latlon_shem_1k)
Information:  Summary ? | License ? | Metadata | Background (external link) | Data Access Form | Files
 
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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:

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  rows {
    UInt32 _ChunkSizes 8024;
    String _CoordinateAxisType "GeoY";
    Int32 actual_range -4012000, 4011000;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Northing of Pixel Centers";
    String standard_name "projection_y_coordinate";
    String units "meters";
  }
  cols {
    UInt32 _ChunkSizes 8024;
    String _CoordinateAxisType "GeoX";
    Int32 actual_range -4012000, 4011000;
    String axis "X";
    String ioos_category "Location";
    String long_name "Easting of Pixel Centers";
    String standard_name "projection_x_coordinate";
    String units "meters";
  }
  longitude {
    String comment "longitude of EASE2 Grid 1km resolution in the polar regions, Antarctic (8024, 8024)";
    String coverage_content_type "coordinate";
    String grid_mapping "crs";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  latitude {
    String comment "latitude of EASE2 Grid 1km resolution in the polar regions, Antarctic (8024, 8024)";
    String coverage_content_type "coordinate";
    String grid_mapping "crs";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  NC_GLOBAL {
    String _NCProperties "version=2,netcdf=4.8.1,hdf5=1.10.7";
    String acknowledgment "This project was supported in part by a grant from the NOAA Climate Data Record Program. Production of original NASA Team and Bootstrap algorithm estimates supported by the NASA Polar Distributed Active Archive Center. The sea ice concentration algorithms were developed by Donald J. Cavalieri, Josefino C. Comiso, Claire L. Parkinson, and others at the NASA Goddard Space Flight Center in Greenbelt, MD.";
    String cdm_data_type "Grid";
    String cdr_program "NOAA National Environmental Satellite, Data and Information Service";
    String cdr_variable "latitude and longitude grids";
    String comment "none";
    String contributor_name "Walter N. Meier, Florence Fetterer, Ann Windnagel, J. Scott Stewart, Trey Stafford, Matt Fisher";
    String contributor_role "principal investigator, author, author, software developer, software developer, software developer";
    String Conventions "CF-1.6, ACDD-1.3, NOAA CDR v1.0, GDS v2.0, COARDS";
    String creator_email "rdworak@ssec.wisc.edu";
    String creator_name "Richard J. Dworak";
    String creator_type "person";
    String creator_url "stratus.ssec.wisc.edu";
    String date_created "2024-04-04";
    String grid_mapping_epsg_code "6932";
    String grid_mapping_latitude_of_projection_origin "90.0f";
    String grid_mapping_longitude_of_projection_origin "0.0f";
    String grid_mapping_name "lambert_azimuthal_equal_area";
    String grid_mappingearth_radius "6378137.0f";
    String grid_mappingfalse_easting "0.0f";
    String grid_mappingfalse_northing "0.0f";
    String history 
"AMSR2 and VIIRS
2024-07-24T06:09:15Z (local files)
2024-07-24T06:09:15Z https://polarwatch.noaa.gov/griddap/nesdis_ease2_latlon_shem_1k.das";
    String id "PS-LatLon_EASE_v2r0_Shem";
    String infoUrl "https://www.star.nesdis.noaa.gov/jpss/documents/ATBD/ATBD_EPS_Cloud_Mask_v1.2.pdf";
    String infourl "https://www.ospo.noaa.gov/Products/Suites/files/atbd/ATBD_IceSurfaceTemperatureIceConcentration_v1.0.pdf and https://ntrs.nasa.gov/api/citations/20140017491/downloads/20140017491.pdf";
    String institution "Cooperative Institute for Meteorological Studies, University of Wisconsin at Madison";
    String keywords "Earth Science > Cryosphere > Sea Ice > Earth Science > Blended Product > Amsr2 > Viirs";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "These data may be redistributed and used without restriction.";
    String metadata_Link "https://nsidc.org/data/g02202/versions/4/";
    String metadata_link "https://www.star.nesdis.noaa.gov/jpss/documents/ATBD/ATBD_EPS_Cloud_Mask_v1.2.pdf";
    String nameing_authority "ssec.wisc.edu";
    String naming_authority "org.doi.dx";
    String platform "NOAA20 and GCOM-W1";
    String processing_level "L3 Mapped";
    String product_version "v1.0";
    String program "NOAA Climate Data Record Program";
    String proj4_string "WGS84";
    String project "NOAA/NSIDC passive microwave sea ice concentration climate data record";
    String references "https://www.mdpi.com/2072-4292/13/15/2982";
    String sensor "Visible Infrared Imaging Radiometer Suite and The Advanced Microwave Scanning Radiometer 2";
    String software_version_id "git@bitbucket.org:nsidc/seaice_cdr.git@a11f275ee7ada7a9cdadada1b3d252de674d624f";
    String source "AMSR2 and VIIRS";
    String sourceUrl "(local files)";
    String spatial_resolution "1 km";
    String standard_name_vocabulary "CF Standard Name Table v36";
    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 Antarctic. 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 time_coverage_duration "P1D";
    String time_coverage_resolution "P1D";
    String title "Latitude and Longitude grids corresponding to ygrids and xgrids in EASE-2 Projection used in NESDIS sea ice data products. Antarctic, 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.

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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