Make A Graph

Dataset Title:	Ocean Surface Winds, QuikSCAT - Weekly, 1999-2009
Institution:	NOAA/NESDIS/OceanWatch - Central Pacific (Dataset ID: OceanWatch_qscat_wind_weekly)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Data Access Form

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Graph Type:
X Axis:
Y Axis:
Color:

Dimensions

Start

Stop

time (UTC)

specify just 1 value →

latitude (degrees_north)

longitude (degrees_east)

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

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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:

Web page authors can embed a graph of the latest data in a web page using HTML <img> tags.
Anyone can use ERDDAPs Slide Sorter to build a personal web page that displays graphs with the latest data (or other images or HTML content), each in its own, draggable slide.

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 9.330336e+8, 1.258416e+9;
    String avg_period "0000-00-07 00:00:00";
    String axis "T";
    String delta_t "0000-00-06 00:00:00";
    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 -70.0, 70.0;
    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, 359.5;
    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";
  }
  curl {
    Float32 _FillValue -3.4e+38;
    String ioos_category "Wind";
    String long_name "Wind Stress Curl";
    Float32 missing_value -3.4e+38;
    String short_units "Pa/m";
    String units "Pascals per meter";
  }
  divw {
    Float32 _FillValue -3.4e+38;
    Float64 colorBarMaximum 15.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Wind";
    String long_name "Wind Speed Divergence";
    Float32 missing_value -3.4e+38;
    String short_units "S -1";
    String standard_name "wind_speed";
    String units "Seconds^-1";
  }
  mag {
    Float32 _FillValue -3.4e+38;
    Float64 colorBarMaximum 15.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Wind";
    String long_name "Wind Speed";
    Float32 missing_value -3.4e+38;
    String short_units "m/s";
    String standard_name "wind_speed";
    String units "Meters per second";
  }
  taumag {
    Float32 _FillValue -3.4e+38;
    String ioos_category "Wind";
    String long_name "Wind Stress";
    Float32 missing_value -3.4e+38;
    String short_units "Pa";
    String units "Pascals";
  }
  taux {
    Float32 _FillValue -3.4e+38;
    Float64 colorBarMaximum 0.5;
    Float64 colorBarMinimum -0.5;
    String ioos_category "Wind";
    String long_name "Zonal Wind Stress";
    Float32 missing_value -3.4e+38;
    String short_units "Pa";
    String standard_name "surface_downward_eastward_stress";
    String units "Pascals";
  }
  tauy {
    Float32 _FillValue -3.4e+38;
    Float64 colorBarMaximum 0.5;
    Float64 colorBarMinimum -0.5;
    String ioos_category "Wind";
    String long_name "Meridional Wind Stress";
    Float32 missing_value -3.4e+38;
    String short_units "Pa";
    String standard_name "surface_downward_northward_stress";
    String units "Pascals";
  }
  ux {
    Float32 _FillValue -3.4e+38;
    Float64 colorBarMaximum 15.0;
    Float64 colorBarMinimum -15.0;
    String ioos_category "Wind";
    String long_name "Zonal Wind Speed";
    Float32 missing_value -3.4e+38;
    String short_units "m/s";
    String standard_name "eastward_wind";
    String units "meter second-1";
  }
  vy {
    Float32 _FillValue -3.4e+38;
    Float64 colorBarMaximum 15.0;
    Float64 colorBarMinimum -15.0;
    String ioos_category "Wind";
    String long_name "Meridional Wind Speed";
    Float32 missing_value -3.4e+38;
    String short_units "m/s";
    String standard_name "northward_wind";
    String units "meter second-1";
  }
  NC_GLOBAL {
    String acknowledgements "IFREMER (France)";
    String cdm_data_type "Grid";
    String comment "Satellite-Derived Ocean Surface Wind Data";
    String composite "true";
    String contributor_name "NOAA OceanWatch - Central Pacific";
    String contributor_url "https://oceanwatch.pifsc.noaa.gov";
    String Conventions "CF-1.6, CW HDF, COARDS, 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 "2012-09-12";
    String date_issued "2012-09-12";
    Float64 Easternmost_Easting 359.5;
    Float64 geospatial_lat_max 70.0;
    Float64 geospatial_lat_min -70.0;
    Float64 geospatial_lat_resolution 0.5;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 359.5;
    Float64 geospatial_lon_min 0.0;
    Float64 geospatial_lon_resolution 0.5;
    String geospatial_lon_units "degrees_east";
    String grid_type "REGULAR";
    String history 
"File generated at NOAA OceanWatch - Central Pacific
2023-03-26T09:25:39Z https://oceanwatch.pifsc.noaa.gov/thredds/dodsC/qscat/weekly
2023-03-26T09:25:39Z https://oceanwatch.pifsc.noaa.gov/griddap/OceanWatch_qscat_wind_weekly.das";
    String id "QS2009314_2009320_ux";
    String infoUrl "https://oceanwatch.pifsc.noaa.gov/thredds/dodsC/qscat/weekly.html";
    String institution "NOAA/NESDIS/OceanWatch - Central Pacific";
    String keywords "atmosphere, atmospheric, central, curl, data, divergence, divw, downward, Earth Science > Atmosphere > Atmospheric Winds, Earth Science > Atmosphere > Atmospheric Winds > Surface Winds, Earth Science > Atmosphere > Atmospheric Winds > Wind Stress, eastward, eastward_wind, environmental, information, mag, meridional, national, nesdis, noaa, northward, northward_wind, ocean, oceanwatch, pacific, quikscat, satellite, service, speed, stress, surface, surface_downward_eastward_stress, surface_downward_northward_stress, taumag, taux, tauy, time, weekly, wind, wind_speed, winds, zonal";
    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 70.0;
    String origin "NOAA OceanWatch - Central Pacific";
    String processing_level "3";
    String product "Ocean Surface Winds";
    String project "NOAA CoastWatch/OceanWatch - Central Pacific";
    String projection "Geographic";
    String projection_type "mapped";
    String references "Refer to IFREMER for full listing http://www.ifremer.fr";
    String satellite "QuikSCAT";
    String sensor "Sea Winds Scatterometer";
    String source_data "IFREMER (France)";
    String sourceUrl "https://oceanwatch.pifsc.noaa.gov/thredds/dodsC/qscat/weekly";
    Float64 Southernmost_Northing -70.0;
    String standard_name_vocabulary "CF Standard Name Table v29";
    String summary "QuikSCAT Winds - Weekly. Satellite-Derived Ocean Surface Wind Data. 1999 - 2009. spatial resolution = 0.5&deg";
    Float64 temporal_extent 86400.0, 86400.0, 86400.0, 86400.0, 86400.0, 86400.0, 86398.0;
    String time_coverage_end "2009-11-17T00:00:00Z";
    String time_coverage_start "1999-07-27T00:00:00Z";
    String title "Ocean Surface Winds, QuikSCAT - Weekly, 1999-2009";
    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.

(easy) You can get data by using the dataset's Data Access Form. It makes the URL for you.
(easy) You can make a graph or map by using the dataset's Make A Graph form. It makes the URL for you.
(not hard) You can bypass the forms and get the data or make a graph or map by generating the URL by hand or with a computer program or script.

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.