Voice of the Ocean ERDDAP™
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Dataset Title:	Sailbuoy data from the Baltic
Institution:	Voice of the Ocean Foundation (Dataset ID: SB2121_20250905T0539_R)
Range:	longitude = 9.59745 to 10.11687°E, latitude = 57.99498 to 58.25868°N, time = 1970-01-01T00:00:00Z to 1970-01-09T02:50:24Z
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Subset \| Data Access Form \| Files

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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 {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 0.0, 701424.0;
    String axis "T";
    String calendar "proleptic_gregorian";
    String ioos_category "Time";
    String long_name "Time";
    String name "time";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  TEMP {
    Float64 _FillValue NaN;
    Float64 actual_range 16.377, 17.503;
    Float64 colorBarMaximum 32.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Temperature";
    String long_name "Temperature of the water body by CTD";
    Float64 missing_value NaN;
    String observation_type "measured";
    String standard_name "sea_water_temperature";
    String units "degree_C";
    Float64 valid_max 42.0;
    Float64 valid_min -5.0;
    String vocabulary "https://vocab.nerc.ac.uk/collection/OG1/current/TEMP/";
  }
  CNDC {
    Float64 _FillValue NaN;
    Float64 actual_range 40.73, 43.46;
    Float64 colorBarMaximum 40.0;
    Float64 colorBarMinimum 30.0;
    String ioos_category "Salinity";
    String long_name "Electrical conductivity of the water body by CTD";
    Float64 missing_value NaN;
    String observation_type "measured";
    String sensor "sensor_ctd";
    String standard_name "sea_water_electrical_conductivity";
    String units "mS cm-1";
    Float64 valid_max 85.0;
    Float64 valid_min 0.0;
    String vocabulary "https://vocab.nerc.ac.uk/collection/OG1/current/CNDC/";
  }
  PSAL {
    Float64 _FillValue NaN;
    Float64 actual_range 31.49, 33.93;
    Float64 colorBarMaximum 37.0;
    Float64 colorBarMinimum 32.0;
    String comment "Practical salinity of the water body by CTD and computation using UNESCO 1983 algorithm";
    String ioos_category "Salinity";
    String long_name "water salinity";
    Float64 missing_value NaN;
    String observation_type "calculated";
    String sensor "sensor_ctd";
    String sources "CNDC, TEMP, PRES";
    String standard_name "sea_water_practical_salinity";
    String units "1e-3";
    Float64 valid_max 40.0;
    Float64 valid_min 0.0;
    String vocabulary "https://vocab.nerc.ac.uk/collection/OG1/current/PSAL/";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 _FillValue NaN;
    Float64 actual_range 57.99498, 58.25868;
    String axis "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String coordinate_reference_frame "urn:ogc:crs:EPSG::4326";
    String ioos_category "Location";
    String long_name "Latitude north";
    String observation_type "measured";
    String platform "platform";
    String references "WGS84";
    String standard_name "latitude";
    String units "degrees_north";
    Float64 valid_max 90.0;
    Float64 valid_min -90.0;
    String vocabulary "https://vocab.nerc.ac.uk/collection/OG1/current/LAT/";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 _FillValue NaN;
    Float64 actual_range 9.59745, 10.11687;
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String coordinate_reference_frame "urn:ogc:crs:EPSG::4326";
    String ioos_category "Location";
    String long_name "Longitude east";
    String observation_type "measured";
    String platform "platform";
    String references "WGS84";
    String standard_name "longitude";
    String units "degrees_east";
    Float64 valid_max 180.0;
    Float64 valid_min -180.0;
    String vocabulary "https://vocab.nerc.ac.uk/collection/OG1/current/LON/";
  }
  trajectory {
    Float64 _FillValue 9223372036854775807;
    Float64 actual_range 1, 1;
    String cf_role "trajectory_id";
    String long_name "Trajectory";
  }
 }
  NC_GLOBAL {
    String acknowledgement "This study used data collected and made freely available by Voice of the Ocean Foundation (https://voiceoftheocean.org)";
    String agency "Voice of the Ocean";
    String agency_role "contact point";
    String agency_role_vocabulary "https://vocab.nerc.ac.uk/collection/C86/current/";
    String area "Baltic Sea";
    String cdm_data_type "Trajectory";
    String cdm_trajectory_variables "trajectory";
    String contributing_institutions "Voice of the Ocean Foundation";
    String contributing_institutions_role "Operator";
    String contributing_institutions_role_vocabulary "https://vocab.nerc.ac.uk/collection/W08/current/";
    String contributor_email "callum.rollo@voiceoftheocean.org, louise.biddle@voiceoftheocean.org, , , , , ,";
    String contributor_role "Data scientist, PI, Operator, Operator, Operator, Operator, Operator, Operator,";
    String contributor_role_vocabulary "https://vocab.nerc.ac.uk/collection/W08/";
    String Conventions "CF-1.11, COARDS, ACDD-1.3";
    String creator_email "callum.rollo@voiceoftheocean.org";
    String creator_name "Callum Rollo";
    String creator_type "person";
    String creator_url "https://observations.voiceoftheocean.org";
    String date_created "2025-09-05T16:10:25Z";
    String date_issued "2025-09-05T16:10:25Z";
    String disclaimer "Data, products and services from VOTO are provided 'as is' without any warranty as to fitness for a particular purpose.";
    Float64 Easternmost_Easting 10.11687;
    String featureType "Trajectory";
    Float64 geospatial_lat_max 58.25868;
    Float64 geospatial_lat_min 57.99498;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 10.11687;
    Float64 geospatial_lon_min 9.59745;
    String geospatial_lon_units "degrees_east";
    String history 
"Voice of the Ocean Foundation
2025-09-13T08:55:19Z (local files)
2025-09-13T08:55:19Z https://erddap.observations.voiceoftheocean.org/tabledap/SB2121_20250905T0539_R.das";
    String id "SB2121_20250905T0539_R";
    String infoUrl "https://observations.voiceoftheocean.org";
    String inspire "ISO 19115";
    String institution "Voice of the Ocean Foundation";
    String institution_country "SWE";
    String institution_edmo_code "5579";
    String keywords "baltic, body, CNDC, conductivity, ctd, data, density, depth, earth, Earth Science > Oceans > Ocean Temperature > Water Temperature, Earth Science > Oceans > Salinity/Density > Conductivity, Earth Science > Oceans > Salinity/Density > Salinity, electrical, foundation, identifier, latitude, longitude, ocean, ocean pressure, ocean temperature, oceans, practical, PSAL, sailbuoy, salinity, salinity/density, science, sea, sea_water_electrical_conductivity, sea_water_practical_salinity, sea_water_temperature, seawater, sonde, TEMP, temperature, time, trajectory, voice, water, water pressure, water temperature";
    String keywords_vocabulary "GCMD Science Keywords";
    String licence "Creative Commons Attribution 4.0 (https://creativecommons.org/licenses/by/4.0/) This study used data collected and made freely available by Voice of the Ocean Foundation (https://voiceoftheocean.org) accessed from https://erddap.observations.voiceoftheocean.org/erddap/index.html";
    String license "Data, products and services from VOTO are provided 'as is' without any warranty as to fitness for a particular purpose.";
    Float64 Northernmost_Northing 58.25868;
    String platform "autonomous surface water vehicle";
    String platform_serial "SB2121";
    String platform_vocabulary "https://vocab.nerc.ac.uk/collection/L06/current/3B/";
    String QC_indicator "L1";
    String references "Voice of the Ocean Foundation";
    String sensor_ctd "{'sensor_type': 'CTD', 'sensor_type_vocabulary': 'https://vocab.nerc.ac.uk/collection/L05/current/130/', 'sensor_maker': 'RBR', 'sensor_maker_vocabulary': 'https://vocab.nerc.ac.uk/collection/L35/current/MAN0049/', 'sensor_model': 'RBR Legato3 CTD', 'sensor_model_vocabulary': 'https://vocab.nerc.ac.uk/collection/L22/current/TOOL1745/', 'long_name': 'RBR Legato3 CTD', 'serial_number': 207496, 'calibration_date': '2021-06-22'}";
    String sensor_meteorology "{'sensor_type': 'meteorological packages', 'sensor_type_vocabulary': 'https://vocab.nerc.ac.uk/collection/L05/current/102/', 'sensor_maker': 'Gill Instruments', 'sensor_maker_vocabulary': 'https://vocab.nerc.ac.uk/collection/L35/current/MAN0121/', 'sensor_model': 'Gill Instruments MaxiMet Marine GMX560 weather station', 'sensor_model_vocabulary': 'https://vocab.nerc.ac.uk/collection/L22/current/TOOL2098/', 'long_name': 'Gill Instruments MaxiMet Marine GMX560 weather station', 'serial_number': 24080013}";
    String sensor_wave "{'sensor_type': 'wave recorders', 'sensor_type_vocabulary': 'https://vocab.nerc.ac.uk/collection/L05/current/110/', 'sensor_maker': 'Datawell B.V.', 'sensor_maker_vocabulary': 'https://vocab.nerc.ac.uk/collection/L35/current/MAN0124/', 'sensor_model': 'Datawell MOSE-G1000', 'sensor_model_vocabulary': 'Datawell MOSE-G1000', 'long_name': 'Datawell MOSE-G1000', 'serial_number': 'unknown'}";
    String source "Voice of the Ocean Foundation";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 57.99498;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String subsetVariables "trajectory";
    String summary "Sailbuoy data from the Baltic. Voice of the Ocean Foundation data from a local source.";
    String testOutOfDate "now-1day";
    String time_coverage_end "1970-01-09T02:50:24Z";
    String time_coverage_start "1970-01-01T00:00:00Z";
    String title "Sailbuoy data from the Baltic";
    String variables 
"time
TEMP
CNDC
PSAL
LATITUDE
LONGITUDE";
    Float64 Westernmost_Easting 9.60387;
  }
}

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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