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Dataset Title:  Ice Lat-Lon Grid, NOAA VIIRS Sea Ice Products, Polar Stereographic (North),
Arctic, 750m
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Institution:  NOAA/NESDIS/STAR/SOCD   (Dataset ID: noaacwVIIRSicegridNP06)
Information:  Summary ? | License ? | Metadata | Background (external link) | Files | Make a graph
 
Dimensions ? Start ? Stride ? Stop ?  Size ?    Spacing ?
 rows (m) ?      8640    -795.0 (even)
  < slider >
 cols (m) ?      8640    795.0 (even)
  < slider >
 
Grid Variables (which always also download all of the dimension variables)
 latitude (degrees_north) ?
 longitude (degrees_east) ?

File type: (more info)

(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 -3434002.500001564, 3434002.500001562;
    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 -3434002.500001565, 3434002.500001561;
    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 standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String ioos_category "Location";
    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 "coastwatch.info@noaa.gov";
    String creator_name "NOAA/NESDIS/STAR/SOCD/CoastWatch";
    String creator_type "institution";
    String creator_url "https://coastwatch.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\"]]";
    Float64 cw_polygon_latitude 47.197073938121655, 55.5893104442431, 59.0449409503699, 55.589310444243104, 47.19707393812169, 55.589310444243104, 59.0449409503699, 55.5893104442431, 47.19707393812166, 55.58931044424308, 59.044940950369885, 55.58931044424307, 47.19707393812164, 55.58931044424307, 59.04494095036987, 55.58931044424308, 47.197073938121655;
    Float64 cw_polygon_longitude -179.99999999999997, 161.565051177078, 135.00000000000003, 108.43494882292204, 90.0, 71.56505117707799, 44.99999999999997, 18.43494882292198, -2.5444437451708134e-14, -18.43494882292204, -45.00000000000003, -71.565051177078, -90.0, -108.43494882292201, -134.99999999999997, -161.56505117707798, -179.99999999999997;
    String cw_projection "Polar Stereographic";
    String cw_satellite "S-NPP";
    String cw_sensor "VIIRS";
    String cw_software_name "JRR-IceConcentration";
    String cw_software_version "v2r3";
    Int32 cw_swath_sync_lines 2147483647;
    String date_created "2021-04-05T05:21:41Z";
    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 
"2021-12-09T07:14:36Z (local files)
2021-12-09T07:14:36Z https://polarwatch.noaa.gov/erddap/griddap/noaacwVIIRSicegridNP06.das";
    String infoUrl "https://coastwatch.noaa.gov/cw/satellite-data-products/sea-ice/viirs-sea-ice-concentration-ice-thickness-ice-surface-temperature.html";
    String institution "NOAA/NESDIS/STAR/SOCD";
    String instrument "VIIRS";
    String keywords "altitude, cols, concentration, daily, data, day, distribution, environmental, graphics, ice, ice distribution, iceconc, imager, imager/radiometer, imaging, information, infrared, latitude, longitude, merge, national, nesdis, noaa, npp, optical, optical properties, orbiting, overlay, partnership, planes, polar, polar-orbiting, properties, radiometer, rows, s-npp, satellite, service, socd, star, suite, swath_latitude, swath_longitude, time, viirs, visible";
    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 OBSERVED_PROPERTY "IceConc";
    String platform "S-NPP";
    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 source "S-NPP_VIIRS_IceConc";
    String sourceUrl "(local files)";
    String srid "EPSG:3413";
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "This ERDDAP dataset provides the latitude - longitude grid for the Arctic (Northern Hemisphere) VIIRS sea ice datasets distributed via the PolarWatch ERDDAP. The coordinating projected grid is in NSIDC polar stereographic north projection (EPSG:3413). The input netCDF files from CoastWatch contain both the projected grid and the lat-lon grid and are available through the CoastWatch ERDDAP files access system. The lat-lon and projected grids are provided as separate datasets in ERDDAP due to ERDDAP's system architecture.";
    String testOutOfDate "now-21days";
    String title "Ice Lat-Lon Grid, NOAA VIIRS Sea Ice Products, Polar Stereographic (North), Arctic, 750m";
  }
}

 

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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