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ERDDAP > griddap > Make A Graph ?

Dataset Title:  BIO WAVEWATCH_III 72 hour Forecast. Gulf of Maine   RSS
Institution:  Bedford Institute of Oceanography   (Dataset ID: WW3_72_GulfOfMaine_latest)
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:   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 {
    Int32 _ChunkSizes 512;
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.5939936e+9, 1.5942528e+9;
    String axis "T";
    String conventions "relative julian days with decimal part (as parts of the day )";
    String ioos_category "Time";
    String long_name "julian day (UT)";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  latitude {
    Int32 _ChunkSizes 161;
    String _CoordinateAxisType "Lat";
    Float32 actual_range 38.0, 46.0;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
    Float32 valid_max 180.0;
    Float32 valid_min -90.0;
  }
  longitude {
    Int32 _ChunkSizes 321;
    String _CoordinateAxisType "Lon";
    Float32 actual_range -76.0, -60.0;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
    Float32 valid_max 360.0;
    Float32 valid_min -180.0;
  }
  hs {
    Int32 _ChunkSizes 1, 161, 321;
    Float32 _FillValue 9.96921e+36;
    Float64 colorBarMaximum 10.0;
    Float64 colorBarMinimum 0.0;
    String globwave_name "significant_wave_height";
    String ioos_category "Surface Waves";
    String long_name "significant height of wind and swell waves";
    String standard_name "sea_surface_wave_significant_height";
    String units "m";
    Float32 valid_max 32000.0;
    Float32 valid_min 0.0;
  }
  t01 {
    Int32 _ChunkSizes 1, 161, 321;
    Float32 _FillValue 9.96921e+36;
    Float64 colorBarMaximum 15000.0;
    Float64 colorBarMinimum 0.0;
    String globwave_name "mean_period_t01";
    String ioos_category "Surface Waves";
    String long_name "mean period T01";
    String standard_name "sea_surface_wind_wave_mean_period_from_variance_spectral_density_first_frequency_moment";
    String units "s";
    Float32 valid_max 5000.0;
    Float32 valid_min 0.0;
  }
  dir {
    Int32 _ChunkSizes 1, 161, 321;
    Float32 _FillValue 9.96921e+36;
    Float64 colorBarMaximum 360.0;
    Float64 colorBarMinimum 0.0;
    String globwave_name "wave_from_direction";
    String ioos_category "Surface Waves";
    String long_name "wave mean direction";
    String standard_name "sea_surface_wave_from_direction";
    String units "degree";
    Float32 valid_max 3600.0;
    Float32 valid_min 0.0;
  }
  NC_GLOBAL {
    String area "Gulf of Main 03 arc min grd3";
    String cdm_data_type "Grid";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_name "Principal Investigator\">Dr. William Perrie";
    String creator_url "http://www.bio.gc.ca/";
    Float64 Easternmost_Easting -60.0;
    Float64 geospatial_lat_max 46.0;
    Float64 geospatial_lat_min 38.0;
    Float64 geospatial_lat_resolution 0.05;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -60.0;
    Float64 geospatial_lon_min -76.0;
    Float64 geospatial_lon_resolution 0.05;
    String geospatial_lon_units "degrees_east";
    String history 
"2020-07-06T16:12:09Z (local files)
2020-07-06T16:12:09Z http://www.neracoos.org/griddap/WW3_72_GulfOfMaine_latest.das";
    String infoUrl "http://www.neracoos.org";
    String institution "Bedford Institute of Oceanography";
    String keywords "data, density, dir, direction, earth, Earth Science > Oceans > Ocean Waves > Significant Wave Height, Earth Science > Oceans > Ocean Waves > Wave Frequency, Earth Science > Oceans > Ocean Waves > Wave Period, Earth Science > Oceans > Ocean Waves > Wave Spectra, Earth Science > Oceans > Ocean Waves > Wave Speed/Direction, Earth Science > Oceans > Ocean Waves > Wind Waves, sea_surface_wave_from_direction, sea_surface_wave_peak_frequency, sea_surface_wave_significant_height";
    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.";
    String maximum_altitude "9000 m";
    String minimum_altitude "-12000 m";
    Float64 Northernmost_Northing 46.0;
    String product_name "ww3.20200706.nc";
    Float32 SIN4_namelist_parameter_BETAMAX 1.65;
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 38.0;
    String standard_name_vocabulary "CF Standard Name Table v29";
    String summary "BIO Wave Watch III Latest 72 hour Forecasts Gulf Of Maine";
    String testOutOfDate "now+1day";
    String time_coverage_end "2020-07-09T00:00:00Z";
    String time_coverage_start "2020-07-06T00:00:00Z";
    String title "BIO WAVEWATCH_III 72 hour Forecast. Gulf of Maine";
    String WAVEWATCH_III_switches "F90 SHRD NOGRB NOPA LRB4 NC4 TRKNC PR3 UQ FLX0 LN1 ST4 STAB0 NL1 BT1 DB1 MLIM IC0 IS0 REF0 WNT2 WNX2 RWND CRT1 CRX1 TR0 BS0 XX0 O0 O1 O2 O3 O4 O5 O6 O7";
    String WAVEWATCH_III_version_number "5.16";
    Float64 Westernmost_Easting -76.0;
  }
}

 

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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