Make A Graph

Dataset Title:	Metocean data collected during V25 citizen science campaign aboard the Swan Hellenic SH Vega ship for the Cruising4Oceans project
Institution:	Swan Hellenic (Dataset ID: swan_hellenic_meteocean_V25)
Range:	longitude = -94.53167 to -51.111668°E, latitude = 66.71667 to 74.60667°N, time = 2024-09-10T13:00:00Z to 2024-09-24T13:00:00Z
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Data Access Form \| Files

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X Axis:

Y Axis:

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Constraints	Optional Constraint #1		Optional Constraint #2

Server-side Functions

distinct()

Hover here to see a list of options. Click on an option to select it.

Graph Settings

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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 {
 s {
  DateTimeLocal {
    String ioos_category "Time";
    String long_name "Date/time (local)";
    String source_name "Date/time (local)";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String time_precision "1970-01-01T00:00Z";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  Timezone {
    String ioos_category "Unknown";
    String long_name "Timezone";
  }
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.7259732e+9, 1.7271828e+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 66.71666667, 74.60666667;
    String axis "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range -94.53166667, -51.11166667;
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  Report {
    String ioos_category "Unknown";
    String long_name "Report";
  }
  Voyage_state {
    String ioos_category "Unknown";
    String long_name "Voyage State";
  }
  Location {
    String ioos_category "Unknown";
    String long_name "Location";
  }
  Voyage_name {
    String ioos_category "Unknown";
    String long_name "Voyage Name";
  }
  Speed_OG {
    Float32 actual_range 0.0, 13.4;
    String ioos_category "Unknown";
    String long_name "Speed OG";
    String units "kn";
  }
  Speed_TW {
    Float32 actual_range 0.0, 13.5;
    String ioos_category "Unknown";
    String long_name "Speed TW";
    String units "kn";
  }
  True_wind_speed {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 1, 7;
    Float64 colorBarMaximum 15.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Unknown";
    String long_name "Wind Speed";
    String standard_name "wind_speed";
    String units "Bft";
  }
  Wind_direction_absolute {
    Float32 _FillValue 32767.0;
    Float32 actual_range 10.0, 355.0;
    Float64 colorBarMaximum 360.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Unknown";
    String long_name "Wind From Direction";
    String standard_name "wind_from_direction";
  }
  Wave_height {
    Float32 actual_range 0.0, 3.0;
    Float64 colorBarMaximum 10.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Unknown";
    String long_name "Sea Surface Wave Significant Height";
    String standard_name "sea_surface_wave_significant_height";
  }
  Air_temperature {
    Float32 actual_range 0.0, 10.0;
    String ioos_category "Unknown";
    String long_name "Air Temperature";
    String units "degrees_celsius";
  }
  Draft_midship {
    String ioos_category "Unknown";
    String long_name "Draft Midship";
    String units "m";
  }
  Trim {
    String ioos_category "Unknown";
    String long_name "Trim";
    String units "m";
  }
  Distance_OG {
    Float32 actual_range 0.0, 317.4;
    String ioos_category "Unknown";
    String long_name "Distance OG";
    String units "nm";
  }
  Distance_TW {
    Float32 actual_range 0.0, 320.9;
    String ioos_category "Unknown";
    String long_name "Distance TW";
    String units "nm";
  }
  Speed_OG_QC {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 0;
    String ioos_category "Unknown";
    String long_name "Speed OG QC";
  }
  Speed_TW_QC {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 0;
    String ioos_category "Unknown";
    String long_name "Speed TW QC";
  }
  True_wind_speed_QC {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 0;
    String ioos_category "Unknown";
    String long_name "True Wind Speed QC";
  }
  Wind_direction_absolute_QC {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 0;
    String ioos_category "Unknown";
    String long_name "Wind Direction (absolute) QC";
  }
  Wave_height_QC {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 0, 0;
    String ioos_category "Unknown";
    String long_name "Wave Height QC";
  }
  Air_temperature_QC {
    Byte _FillValue 127;
    String _Unsigned "false";
    String ioos_category "Unknown";
    String long_name "Air Temperature QC";
  }
  Draft_midship_QC {
    Byte _FillValue 127;
    String _Unsigned "false";
    String ioos_category "Unknown";
    String long_name "Draft Midship QC";
  }
  Trim_QC {
    Byte _FillValue 127;
    String _Unsigned "false";
    String ioos_category "Unknown";
    String long_name "Trim QC";
  }
  Distance_OG_QC {
    String _Unsigned "false";
    Byte actual_range 0, 0;
    String ioos_category "Unknown";
    String long_name "Distance OG QC";
  }
  Distance_TW_QC {
    String _Unsigned "false";
    Byte actual_range 0, 0;
    String ioos_category "Unknown";
    String long_name "Distance TW QC";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Other";
    String Conventions "COARDS, CF-1.10, ACDD-1.3";
    String creator_name "Swan Hellenic";
    String creator_type "company";
    String creator_url "https://www.swanhellenic.com/";
    Float64 Easternmost_Easting -51.11166667;
    Float64 geospatial_lat_max 74.60666667;
    Float64 geospatial_lat_min 66.71666667;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -51.11166667;
    Float64 geospatial_lon_min -94.53166667;
    String geospatial_lon_units "degrees_east";
    String history 
"2025-12-18T03:27:55Z (local files)
2025-12-18T03:27:55Z http://erddap.s4oceandata.eu/tabledap/swan_hellenic_meteocean_V25.das";
    String infoUrl "https://www.swanhellenic.com/latest-news/cruising4oceans-ocean-conservation-2025";
    String institution "Swan Hellenic";
    String keywords "absolute, air, Air_temperature, Air_temperature_oC_QC, atmosphere, atmospheric, bft, data, date, date/time, direction, distance, Distance_OG, Distance_OG_nm_QC, Distance_TW, Distance_TW_nm_QC, draft, Draft_midship, Draft_midship_m_QC, earth, Earth Science > Atmosphere > Atmospheric Winds > Surface Winds, height, latitude, latitude2, local, Location, longitude, longitude2, midship, name, position, report, science, source, speed, Speed_OG, Speed_OG_kn_QC, Speed_TW, Speed_TW_kn_QC, state, surface, temperature, time, timezone, trim, Trim_m_QC, true, True_wind_speed, True_wind_speed_Bft_QC, voyage, Voyage_name, Voyage_state, wave, Wave_height, Wave_height_m_QC, wind, Wind_direction_absolute, Wind_direction_absolute_o_QC, wind_speed, winds";
    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 74.60666667;
    String platformName "V25";
    String project_code "C4O";
    String project_name "Cruising4Oceans";
    String ship_call_sign "HOA2775";
    String ship_imo "9895252";
    String ship_name "SH VEGA";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 66.71666667;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "Metocean data collected during V25 citizen science campaign aboard the Swan Hellenic SH Vega ship for the Cruising4Oceans project";
    String time_coverage_end "2024-09-24T13:00:00Z";
    String time_coverage_start "2024-09-10T13:00:00Z";
    String title "Metocean data collected during V25 citizen science campaign aboard the Swan Hellenic SH Vega ship for the Cruising4Oceans project";
    Float64 Westernmost_Easting -94.53166667;
  }
}

Using tabledap to Request Data and Graphs from Tabular Datasets

tabledap lets you request a data subset, a graph, or a map from a tabular dataset (for example, buoy data), via a specially formed URL. tabledap uses the OPeNDAP (external link)

Data Access Protocol (DAP) (external link)

and its selection 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 or Subset form. They make 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.

Tabledap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/pmelTaoDySst.htmlTable?longitude,latitude,time,station,wmo_platform_code,T_25&time>=2015-05-23T12:00:00Z&time<=2015-05-31T12:00:00Z
Thus, the query is often a comma-separated list of desired variable names, followed by a collection of constraints (e.g., variable<value), each preceded by '&' (which is interpreted as "AND").

For details, see the tabledap Documentation.

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