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Dataset Title:  Primary Productivity, NOAA-SNPP VIIRS, Global, 0.0375°, EXPERIMENTAL, Daily Subscribe RSS
Institution:  NOAA/NESDIS/STAR/CoastWatch/West Coast   (Dataset ID: viirs_primprod)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Files | Make a graph
 
Dimensions ? Start ? Stride ? Stop ?  Size ?    Spacing ?
 time (Time Baseline, UTC) ?      363    1 day 0h 7m 57s (uneven)
  < slider >
 latitude (degrees_north) ?      4788    -0.0375 (even)
  < slider >
 longitude (degrees_east) ?      9600    0.0375 (even)
  < slider >
 
Grid Variables (which always also download all of the dimension variables) 
 sea_surface_temperature (degree_C) ?
 chlor_a (Surface Chlorophyll a Concentration, mg Chl m-3) ?
 par (Fraction of PAR Applied to PbOpt, mole m-2 d-1) ?
 par_fraction ?
 day_length (Hours of Daylight, h) ?
 productivity (Net Primary Productivity Of Carbon, mg C m-2 d-1) ?

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 {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.4201424e+9, 1.451592e+9;
    String axis "T";
    String calendar "gregorian";
    String ioos_category "Time";
    String long_name "Time Baseline";
    String source_name "time_baseline";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range -89.75625, 89.75625;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String source_name "rows";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range -179.98125, 179.98125;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String source_name "cols";
    String standard_name "longitude";
    String units "degrees_east";
  }
  sea_surface_temperature {
    Float32 _FillValue -999.0;
    Float64 colorBarMaximum 32.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Temperature";
    String long_name "Sea Surface Temperature";
    Float32 missing_value -999.0;
    String source "NOAA";
    String standard_name "sea_surface_temperature";
    String units "degree_C";
  }
  chlor_a {
    Float32 _FillValue -999.0;
    Float32 colorBarMaximum 30.0;
    Float32 colorBarMinimum 0.3;
    String colorBarScale "Log";
    String ioos_category "Ocean Color";
    String long_name "Surface Chlorophyll a Concentration";
    Float32 missing_value -999.0;
    String source "NOAA";
    String standard_name "concentration_of_chlorophyll_in_sea_water";
    String units "mg Chl m-3";
  }
  par {
    Float32 _FillValue -999.0;
    Float32 colorBarMaximum 70.0;
    Float32 colorBarMinimum 0.0;
    String ioos_category "Ocean Color";
    String long_name "Fraction of PAR Applied to PbOpt";
    Float32 missing_value -999.0;
    String source "NOAA";
    String standard_name "downwelling_photosynthetic_photon_radiance_in_sea_water";
    String units "mole m-2 d-1";
  }
  par_fraction {
    Float64 colorBarMaximum 1.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Optical Properties";
    String long_name "Par Fraction";
  }
  day_length {
    Float32 _FillValue -999.0;
    Float32 colorBarMaximum 24.0;
    Float32 colorBarMinimum 0.0;
    String ioos_category "Other";
    String long_name "Hours of Daylight";
    Float32 missing_value -999.0;
    String source "NOAA";
    String units "h";
  }
  productivity {
    Float32 _FillValue -999.0;
    Float32 colorBarMaximum 2000.0;
    Float32 colorBarMinimum 0.0;
    String colorBarPalette "WhiteRedBlack";
    String ioos_category "Other";
    String long_name "Net Primary Productivity Of Carbon";
    Float32 missing_value -999.0;
    String source "NOAA";
    String standard_name "net_primary_productivity";
    String units "mg C m-2 d-1";
  }
  NC_GLOBAL {
    String _NCProperties "version=2,netcdf=4.7.3,hdf5=1.12.0,";
    String acknowledgement "Support provided by NOAA CoastWatch and CSU COAST";
    String cdm_data_type "Grid";
    String Conventions "CF-1.6, COARDS, ACDD-1.3";
    String creator_email "erd.data@noaa.gov";
    String creator_name "Jesse Espinoza, Dale Robinson";
    String creator_type "person";
    String creator_url "https://coastwatch.pfeg.noaa.gov/";
    String defaultGraphQuery "&.vars=longitude%7Clatitude%7Cproductivity";
    Float64 Easternmost_Easting 179.98125;
    Float64 geospatial_lat_max 89.75625;
    Float64 geospatial_lat_min -89.75625;
    Float64 geospatial_lat_resolution 0.0375;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 179.98125;
    Float64 geospatial_lon_min -179.98125;
    Float64 geospatial_lon_resolution 0.0375;
    String geospatial_lon_units "degrees_east";
    Float64 grid_mapping_inverse_flattening 298.257223563;
    Float64 grid_mapping_longitude_of_prime_meridian 0.0;
    String grid_mapping_name "latitude_longitude";
    Float64 grid_mapping_semi_major_axis 6378137.0;
    String history 
"NPP_VIIRS
2024-04-25T13:46:06Z (local files)
2024-04-25T13:46:06Z https://polarwatch.noaa.gov/erddap/griddap/viirs_primprod.das";
    String infoUrl "https://coastwatch.pfeg.noaa.gov/";
    String institution "NOAA/NESDIS/STAR/CoastWatch/West Coast";
    String instrument "VIIRS";
    String keywords "0.0375\\u00b0, active, applied, available, carbon, chemistry, chlor_a, chlorophyll, coast, coastwatch, color, concentration, concentration_of_chlorophyll_in_sea_water, daily, data, day, day_length, daylight, downwelling, downwelling_photosynthetic_photon_radiance_in_sea_water, earth, Earth Science > Oceans > Ocean Chemistry > Chlorophyll, Earth Science > Oceans > Ocean Optics > Photosynthetically Active Radiation, Earth Science > Oceans > Ocean Optics > Radiance, Earth Science > Oceans > Ocean Temperature > Sea Surface Temperature, environmental, experimental, fraction, global, hours, imager, imager/radiometer, imaging, information, infrared, latitude, longitude, national, nesdis, net, net_primary_productivity, noaa, noaa-snpp, npp, ocean, ocean color, oceans, optical, optical properties, optics, orbiting, par, par_fraction, partnership, pbopt, photon, photosynthetic, photosynthetically, polar, polar-orbiting, primary, productivity, properties, radiance, radiation, radiometer, satellite, science, sea, sea_surface_temperature, seawater, service, snpp, sst, star, suite, surface, temperature, time, viirs, visible, water, west, west coast node";
    String keywords_vocabulary "GCMD Science Keywords";
    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.";
    Float64 Northernmost_Northing 89.75625;
    String platform "NPP";
    String publisher_name "NOAA/NMFS/SWFSC/ERD, NOAA/NESDIS/STAR/CoastWatch/West Coast Node";
    String publisher_type "group";
    String publisher_url "https://coastwatch.pfeg.noaa.gov";
    String source "NPP_VIIRS";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing -89.75625;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "Primary Productivity, NOAA-SNPP Visible and Infrared Imager/Radiometer Suite (VIIRS), Global, 0.0375°, EXPERIMENTAL, Daily";
    String testOutOfDate "now-5days";
    String time_coverage_end "2015-12-31T20:00:00Z";
    String time_coverage_start "2015-01-01T20:00:00Z";
    String title "Primary Productivity, NOAA-SNPP VIIRS, Global, 0.0375°, EXPERIMENTAL, Daily";
    Float64 Westernmost_Easting -179.98125;
  }
}

 

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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