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ERDDAP > griddap > Make A Graph ?

Dataset Title:  ZZZ - DEPRECATED - OceanWatch - Photosynthetically Available Radiation (PAR),
Aqua MODIS - Monthly, 2002-present
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Institution:  NOAA/NESDIS/OceanWatch - Central Pacific   (Dataset ID: OceanWatch_aqua_par_monthly)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background | 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:   
 
(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 1.0254816e+9, 1.5304032e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "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";
    Float64 actual_range -90.0, 89.95;
    String axis "Y";
    String coordsys "geographic";
    String ioos_category "Location";
    String long_name "Latitude";
    String point_spacing "even";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range 0.0, 359.95;
    String axis "X";
    String coordsys "geographic";
    String ioos_category "Location";
    String long_name "Longitude";
    String point_spacing "even";
    String standard_name "longitude";
    String units "degrees_east";
  }
  par {
    Float32 _FillValue -3.4e+38;
    Float32 actual_range 0.0, 66.736;
    Float64 colorBarMaximum 70.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Ocean Color";
    String long_name "Photosynthetically Available Radiation";
    Float32 missing_value -3.4e+38;
    String short_units "E/m2/day";
    String standard_name "photosynthetically_available_radiation";
    String units "Einstein m^-2 Day";
  }
  NC_GLOBAL {
    String acknowledgements "NASA Goddard Space Flight Center";
    String cdm_data_type "Grid";
    String comment "AQUA MODIS Ocean Color data product";
    String contributor_name "NOAA OceanWatch - Central Pacific";
    String contributor_url "https://oceanwatch.pifsc.noaa.gov";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "NESDIS.Data.Access@noaa.gov";
    String creator_name "NOAA/NESDIS/OceanWatch - Central Pacific";
    String creator_url "https://www.nesdis.noaa.gov/";
    String date_created "2018-07-19T02:05:58Z";
    String date_issued "2018-07-19T02:05:58Z";
    Float64 Easternmost_Easting 359.95;
    Float64 geospatial_lat_max 89.95;
    Float64 geospatial_lat_min -90.0;
    Float64 geospatial_lat_resolution 0.049999999999999996;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 359.95;
    Float64 geospatial_lon_min 0.0;
    Float64 geospatial_lon_resolution 0.049999999999999996;
    String geospatial_lon_units "degrees_east";
    String grid_type "REGULAR";
    String history 
"File generated at NOAA OceanWatch - Central Pacific
2024-02-22T10:27:28Z https://oceanwatch.pifsc.noaa.gov/thredds/dodsC/aqua-par/monthly
2024-02-22T10:27:28Z https://oceanwatch.pifsc.noaa.gov/griddap/OceanWatch_aqua_par_monthly.das";
    String id "AR2018152_2018181_par.nc";
    String infoUrl "https://oceanwatch.pifsc.noaa.gov/thredds/dodsC/aqua-par/monthly.html";
    String institution "NOAA/NESDIS/OceanWatch - Central Pacific";
    String keywords "aqua, central, chemistry, data, Earth Science > Oceans > Ocean Chemistry > Par, Earth Science > Oceans > Ocean Optics > Ocean Color, environmental, imaging, information, moderate, modis, monthly, national, nesdis, noaa, ocean, ocean color, oceans, oceanwatch, optics, pacific, par, Photosynthetically Available Radiation, resolution, satellite, sea, seawater, service, spectroradiometer, time, water";
    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 OceanWatch, NOAA, nor the US Government, nor any of their employees or contractors, make 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 naming_authority "gov.noaa.pifsc.oceanwatch";
    Float64 Northernmost_Northing 89.95;
    String origin "NOAA OceanWatch - Central Pacific";
    String processing_level "3";
    String product "Aqua MODIS PAR";
    String project "NOAA CoastWatch/OceanWatch - Central Pacific";
    String projection "Geographic";
    String projection_type "mapped";
    String references "Refer to NASA Goddard Space Flight Center https://oceancolor.gsfc.nasa.gov";
    String satellite "NASA Aqua";
    String sensor "MODIS";
    String source_data "NASA Goddard Space Flight Center";
    String sourceUrl "https://oceanwatch.pifsc.noaa.gov/thredds/dodsC/aqua-par/monthly";
    Float64 Southernmost_Northing -90.0;
    String standard_name_vocabulary "CF Standard Name Table v29";
    String summary "Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua - Monthly Ocean Color. Photosynthetically Available Radiation (PAR). 2002 - present. spatial resolution = 0.05&deg. Reprocessed by NASA in June 2015 to correct some sensor drift";
    String time_coverage_end "2018-07-01T00:00:00Z";
    String time_coverage_start "2002-07-01T00:00:00Z";
    String title "ZZZ - DEPRECATED - OceanWatch - Photosynthetically Available Radiation (PAR), Aqua MODIS - Monthly, 2002-present";
    Float64 Westernmost_Easting 0.0;
  }
}

 

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[(2015-06-09T09:00:00Z)][(-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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