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Dataset Title:  VIIRSN, Suomi-NPP, Level-3 SMI, Global, 4km, PIC, 2012-2016, Daily, DEPRECATED Subscribe RSS
Institution:  NASA/GSFC OBPG   (Dataset ID: erdVH2pic1day)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Data Access Form
 
Graph Type:  ?
X Axis:  ?
Y Axis:  ?
Color:  ?
 
Dimensions ?    Start ?    Stop ?
time (UTC) ?     specify just 1 value →
    << -
< <
latitude (degrees_north) ?
    +
    -
< slider >
longitude (degrees_east) ?
    +
    -
< slider >
 
Graph Settings
Color Bar:   Continuity:   Scale: 
   Minimum:   Maximum:   N Sections: 
Draw land mask: 
Y Axis Minimum:   Maximum:   Ascending: 
 
(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 ? )
    Click on the map to specify a new center point. ?
Zoom:
[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:

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.3255056e+9, 1.4592528e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "Centered Time";
    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";
    Float32 _FillValue -32767.0;
    Float32 actual_range -89.97918, 89.97916;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
    Float32 valid_max 90.0;
    Float32 valid_min -90.0;
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 _FillValue -32767.0;
    Float32 actual_range -179.9792, 179.9792;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
    Float32 valid_max 180.0;
    Float32 valid_min -180.0;
  }
  pic {
    Float32 _FillValue -32767.0;
    Float64 colorBarMaximum 0.001;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Ocean Color";
    String long_name "Particulate Inorganic Carbon";
    String reference "Balch, W.M., Gordon, H.R., Bowler, B.C., Drapeau, D.T., and Booth, E.S. (2005), Calcium carbonate measurements in the surface global ocean based on Moderate-Resolution Imaging Spectroradiometer data, J. Geophys. Res., 110, C07001, doi:10.1029/2004JC002560; Gordon, H.R. Boynton, G.C., Balch, W.M., Groom, S.B., Harbour, D.S., Smyth, T.J., Retrieval of Coccolithophore Calcite Concentration from SeaWiFS Imagery, GRL, 28, 8, 1587-1590.";
    String units "mol m^-3";
    Float32 valid_max 0.125;
    Float32 valid_min 0.0;
  }
  NC_GLOBAL {
    String _lastModified "2016-03-29T10:23:30.000Z";
    String cdm_data_type "Grid";
    String Conventions "CF-1.6, COARDS, ACDD-1.3";
    String creator_email "data@oceancolor.gsfc.nasa.gov";
    String creator_name "NASA/GSFC/OBPG";
    String creator_url "https://oceandata.sci.gsfc.nasa.gov";
    String date_created "2016-03-29T10:23:30Z";
    Float64 Easternmost_Easting 179.9792;
    Float64 geospatial_lat_max 89.97916;
    Float64 geospatial_lat_min -89.97918;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 179.9792;
    Float64 geospatial_lon_min -179.9792;
    String geospatial_lon_units "degrees_east";
    String history 
"Datafiles are downloaded ASAP from https://oceandata.sci.gsfc.nasa.gov/VIIRS/Mapped/Daily/4km/PIC/ to NOAA NMFS SWFSC ERD.
NOAA NMFS SWFSC ERD (erd.data@noaa.gov) uses NCML to add the time variable and slightly modify the metadata.
Direct read of HDF4 file through CDM library.
2018-07-19T01:54:41Z http://oceanwatch.pfeg.noaa.gov/thredds/dodsC/satellite/VH2/pic/1day
2018-07-19T01:54:41Z http://coastwatch.pfeg.noaa.gov/griddap/erdVH2pic1day.das";
    String infoUrl "https://oceancolor.gsfc.nasa.gov/data/viirs-snpp/";
    String institution "NASA/GSFC OBPG";
    String instrument "VIIRS";
    String keywords "4km, carbon, chemistry, color, concentration, daily, gsfc, image, inorganic, joint, jpss, level, level-3, mapped, mass, mean, nasa, noaa, npoess, npp, obpg, ocean, ocean color, oceans, orbiting, particulate, pic, polar, satellite, sea, seawater, smi, standard, suomi, viirs, viirsn, water";
    String keywords_vocabulary "GCMD Science Keywords";
    String l2_flag_names "ATMFAIL,LAND,HISATZEN,STRAYLIGHT,CLDICE,LOWLW,NAVWARN,HISOLZEN,NAVFAIL,FILTER,HIGLINT";
    String license 
"https://science.nasa.gov/earth-science/earth-science-data/data-information-policy/
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 map_projection "Equidistant Cylindrical";
    String measure "Mean";
    String naming_authority "gov.noaa.pfeg.coastwatch";
    Float64 Northernmost_Northing 89.97916;
    String platform "Suomi-NPP";
    String processing_control_input_parameters_datamax "0.050000";
    String processing_control_input_parameters_datamin "0.000010";
    String processing_control_input_parameters_deflate "4";
    String processing_control_input_parameters_gap_fill "0";
    String processing_control_input_parameters_ifile "V2016088.L3b_DAY_NPP_PIC.nc";
    String processing_control_input_parameters_latnorth "90.000000";
    String processing_control_input_parameters_latsouth "-90.000000";
    String processing_control_input_parameters_loneast "180.000000";
    String processing_control_input_parameters_lonwest "-180.000000";
    String processing_control_input_parameters_meas "1";
    String processing_control_input_parameters_minobs "0";
    String processing_control_input_parameters_ofile "V2016088.L3m_DAY_NPP_PIC_pic_4km.nc";
    String processing_control_input_parameters_oformat "netCDF4";
    String processing_control_input_parameters_palfile "/sdps/sdpsoper/Science/OCSSW/V2015.3/data/common/palette/calcite.pal";
    String processing_control_input_parameters_precision "F";
    String processing_control_input_parameters_processing "2014.0.1QL";
    String processing_control_input_parameters_prod "pic";
    String processing_control_input_parameters_projection "RECT";
    String processing_control_input_parameters_resolution "4km";
    String processing_control_input_parameters_seam_lon "-180.000000";
    String processing_control_input_parameters_stype "2";
    String processing_control_l2_flag_names "ATMFAIL,LAND,HISATZEN,STRAYLIGHT,CLDICE,LOWLW,NAVWARN,HISOLZEN,NAVFAIL,FILTER,HIGLINT";
    String processing_control_software_name "smigen";
    String processing_control_software_version "5.04";
    String processing_control_source "V2016088.L3b_DAY_NPP_PIC.nc";
    String processing_level "L3 Mapped";
    String processing_version "2014.0.1QL";
    String project "Ocean Biology Processing Group (NASA/GSFC/OBPG)";
    String publisher_email "data@oceancolor.gsfc.nasa.gov";
    String publisher_name "NASA/GSFC/OBPG";
    String publisher_url "https://oceandata.sci.gsfc.nasa.gov";
    String references "Balch, W.M., Gordon, H.R., Bowler, B.C., Drapeau, D.T., and Booth, E.S. (2005), Calcium carbonate measurements in the surface global ocean based on Moderate-Resolution Imaging Spectroradiometer data, J. Geophys. Res., 110, C07001, doi:10.1029/2004JC002560; Gordon, H.R. Boynton, G.C., Balch, W.M., Groom, S.B., Harbour, D.S., Smyth, T.J., Retrieval of Coccolithophore Calcite Concentration from SeaWiFS Imagery, GRL, 28, 8, 1587-1590.";
    String sourceUrl "http://oceanwatch.pfeg.noaa.gov/thredds/dodsC/satellite/VH2/pic/1day";
    Float64 Southernmost_Northing -89.97918;
    String spatialResolution "4.60 km";
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary 
"DEPRECATED 2016-04-01 - SEE THE NEW erdVH2018 VERSION. 
Level-3 Standard Mapped Image (SMI), Global, 4km, Particulate Inorganic Carbon (PIC), Daily composite data from the Visible and Infrared Imager/Radiometer Suite (VIIRS). VIIRS is a multi-disciplinary instrument that flies on the Suomi-NPP (National Polar-orbiting Partnership) satellite.  Suomi-NPP is the initial spacecraft in the JPSS (Joint Polar Satellite Systems) series of spacecraft. JPSS is our Nation's next generation polar-orbiting operational environmental satellite system. JPSS is a collaborative program between NOAA and its acquisition agent NASA. VIIRS is the successor to MODIS for Earth science data product generation. (This version of the VH data was first released in December 2014.)";
    String time_coverage_end "2016-03-29T12:00:00Z";
    String time_coverage_start "2012-01-02T12:00:00Z";
    String title "VIIRSN, Suomi-NPP, Level-3 SMI, Global, 4km, PIC, 2012-2016, Daily, DEPRECATED";
    Float64 Westernmost_Easting -179.9792;
  }
}

 

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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