ERDDAP > tabledap > Data Access Form

Dataset Title:	WCO - L4 Buoy - CTD (level 3)
Institution:	Plymouth Marine Laboratory   (Dataset ID: Level2_7324_cbbc_73a6)
Information:	Summary | License | Metadata | Background | Files | Make a graph

 

Variable	Optional Constraint #1		Optional Constraint #2		Minimum	Maximum
time (Date (UTC), UTC)	!= =~ <= >= = < >		!= =~ <= >= = < >		2025-09-30T23:04:20Z	2026-01-06T10:06:34Z
Temperature (deg/C)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.053	16652.0
Conductivity (S/m)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.007	2000.105
Pressure (dbar)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.41	3288.0
Salinity (PSU)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	7.939908E7
depth (m)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.5	3234.5
Oxygen (uM/kg)	!= =~ <= >= = < >		!= =~ <= >= = < >		-65.089	233.217
CDOM (ppb)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.013	108.993
Chlorophyll_a (Chlorophyll-a, mg/m3)	!= =~ <= >= = < >		!= =~ <= >= = < >		-0.695	48.914
Turbidity (NTU)	!= =~ <= >= = < >		!= =~ <= >= = < >		-0.054	24.467

 

Server-side Functions

distinct()

orderBy orderByDescending orderByClosest orderByCount orderByLimit orderByMax orderByMin orderByMinMax orderByMean orderBySum (" time Temperature Conductivity Pressure Salinity depth Oxygen CDOM Chlorophyll_a Turbidity time Temperature Conductivity Pressure Salinity depth Oxygen CDOM Chlorophyll_a Turbidity time Temperature Conductivity Pressure Salinity depth Oxygen CDOM Chlorophyll_a Turbidity time Temperature Conductivity Pressure Salinity depth Oxygen CDOM Chlorophyll_a Turbidity time Temperature Conductivity Pressure Salinity depth Oxygen CDOM Chlorophyll_a Turbidity ")

File type: (more information) .asc - View OPeNDAP-style ISO-8859-1 comma-separated text. .csv - Download a ISO-8859-1 comma-separated text table (line 1: names; line 2: units; ISO 8601 times). .csvp - Download a ISO-8859-1 .csv file with line 1: name (units). Times are ISO 8601 strings. .csv0 - Download a ISO-8859-1 .csv file without column names or units. Times are ISO 8601 strings. .dataTable - A JSON file formatted for use with the Google Visualization client library (Google Charts). .das - View the dataset's metadata via an ISO-8859-1 OPeNDAP Dataset Attribute Structure (DAS). .dds - View the dataset's structure via an ISO-8859-1 OPeNDAP Dataset Descriptor Structure (DDS). .dods - OPeNDAP clients use this to download the data in the DODS binary format. .esriCsv - Download a ISO_8859_1 .csv file for ESRI's ArcGIS 9.x and below (separate date and time columns). .fgdc - View the dataset's UTF-8 FGDC .xml metadata. .geoJson - Download longitude,latitude,otherColumns data as a UTF-8 GeoJSON .json file. .graph - View a Make A Graph web page. .help - View a web page with a description of tabledap. .html - View an OPeNDAP-style HTML Data Access Form. .htmlTable - View a UTF-8 .html web page with the data in a table. Times are ISO 8601 strings. .iso19115 - View the dataset's ISO 19115-2/19139 UTF-8 .xml metadata. .itx - Download an ISO-8859-1 Igor Text File. Each response column becomes a wave. .json - View a table-like UTF-8 JSON file (missing value = 'null'; times are ISO 8601 strings). .jsonlCSV1 - View a UTF-8 JSON Lines CSV file with column names on line 1 (mv = 'null'; times are ISO 8601 strings). .jsonlCSV - View a UTF-8 JSON Lines CSV file without column names (mv = 'null'; times are ISO 8601 strings). .jsonlKVP - View a UTF-8 JSON Lines file with Key:Value pairs (missing value = 'null'; times are ISO 8601 strings). .mat - Download a MATLAB binary file. .nc - Download a flat, table-like, NetCDF-3 binary file with COARDS/CF/ACDD metadata. .ncHeader - View the UTF-8 header (the metadata) for the NetCDF-3 .nc file. .ncCF - Download a NetCDF-3 CF Discrete Sampling Geometries file (Contiguous Ragged Array). .ncCFHeader - View the UTF-8 header (the metadata) for the .ncCF file. .ncCFMA - Download a NetCDF-3 CF Discrete Sampling Geometries file (Multidimensional Array). .ncCFMAHeader - View the UTF-8 header (the metadata) for the .ncCFMA file. .nccsv - Download a NetCDF-3-like 7-bit ASCII NCCSV .csv file with COARDS/CF/ACDD metadata. .nccsvMetadata - View the dataset's metadata as the top half of a 7-bit ASCII NCCSV .csv file. .ncoJson - Download a UTF-8 NCO lvl=2 JSON file with COARDS/CF/ACDD metadata. .odvTxt - Download longitude,latitude,time,otherColumns as an ISO-8859-1 ODV Generic Spreadsheet File (.txt). .subset - View an HTML form which uses faceted search to simplify picking subsets of the data. .tsv - Download a ISO-8859-1 tab-separated text table (line 1: names; line 2: units; ISO 8601 times). .tsvp - Download a ISO-8859-1 .tsv file with line 1: name (units). Times are ISO 8601 strings. .tsv0 - Download a ISO-8859-1 .tsv file without column names or units. Times are ISO 8601 strings. .wav - Download a .wav audio file. All columns must be numeric and of the same type. .xhtml - View a UTF-8 XHTML (XML) file with the data in a table. Times are ISO 8601 strings. .kml - View a .kml file, suitable for Google Earth. .smallPdf - View a small .pdf image file with a graph or map. .pdf - View a standard, medium-sized .pdf image file with a graph or map. .largePdf - View a large .pdf image file with a graph or map. .smallPng - View a small .png image file with a graph or map. .png - View a standard, medium-sized .png image file with a graph or map. .largePng - View a large .png image file with a graph or map. .transparentPng - View a .png image file (just the data, without axes, landmask, or legend).

(Documentation / Bypass this form )
 
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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.75927346e+9, 1.767693994e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "Date (UTC)";
    String source_name "Date (UTC)";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String time_precision "1970-01-01T00:00:00Z";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  Temperature {
    Float32 actual_range 0.053, 16652.0;
    String ioos_category "Temperature";
    String long_name "Temperature";
    String p01_code "TEMPPR01";
    String p01_uri "https://vocab.nerc.ac.uk/collection/P01/current/TEMPPR01/";
    String units "deg/C";
  }
  Conductivity {
    Float32 actual_range 0.007, 2000.105;
    String ioos_category "Salinity";
    String long_name "Conductivity";
    String p01_code "CNDCZZ25";
    String p01_uri "https://vocab.nerc.ac.uk/collection/P01/current/CNDCZZ25/1/";
    String units "S/m";
  }
  Pressure {
    Float32 actual_range 0.41, 3288.0;
    String ioos_category "Pressure";
    String long_name "Pressure";
    String p01_code "PRESPR01";
    String p01_uri "https://vocab.nerc.ac.uk/collection/P01/current/PRESPR01/";
    String units "dbar";
  }
  Salinity {
    Float32 actual_range 0.0, 7.939908e+7;
    String ioos_category "Salinity";
    String long_name "Salinity";
    String p01_code "PSLTZZ01";
    String p01_uri "https://vocab.nerc.ac.uk/collection/P01/current/PSLTZZ01/";
    String units "PSU";
  }
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Float32 actual_range 0.5, 3234.5;
    String axis "Z";
    String ioos_category "Location";
    String long_name "Depth";
    String positive "down";
    String standard_name "depth";
    String units "m";
  }
  Oxygen {
    Float32 actual_range -65.089, 233.217;
    String ioos_category "Dissolved O2";
    String long_name "Oxygen";
    String p01_code "OXYSSU01";
    String p01_uri "https://vocab.nerc.ac.uk/collection/P01/current/OXYSSU01/";
    String units "uM/kg";
  }
  CDOM {
    Float32 actual_range 0.013, 108.993;
    String ioos_category "Ocean Color";
    String long_name "Chromophoric Dissolved Organic Material";
    String p01_code "CCOMD002";
    String p01_uri "https://vocab.nerc.ac.uk/collection/P01/current/CCOMD002/";
    String units "ppb";
  }
  Chlorophyll_a {
    Float32 actual_range -0.695, 48.914;
    String ioos_category "Ocean Color";
    String long_name "Chlorophyll-a";
    String p01_code "CPHLPM01";
    String p01_uri "https://vocab.nerc.ac.uk/collection/P01/current/CPHLPM01/";
    String units "mg/m3";
  }
  Turbidity {
    Float32 actual_range -0.054, 24.467;
    String ioos_category "Optical Properties";
    String long_name "Turbidity";
    String p01_code "TURBPR01";
    String p01_uri "https://vocab.nerc.ac.uk/collection/P01/current/TURBPR01/2/";
    String units "NTU";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Other";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "rsa@pml.ac.uk";
    String creator_name "Ross Sanders";
    String creator_url "https://pml.ac.uk/profile/ross-sanders/";
    Float64 geospatial_vertical_max 3234.5;
    Float64 geospatial_vertical_min 0.5;
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2026-02-03T16:03:09Z (local files)
2026-02-03T16:03:09Z https://erddap.eofrom.space/erddap/tabledap/Level2_7324_cbbc_73a6.html";
    String infoUrl "https://www.westernchannelobservatory.org.uk/buoys";
    String institution "Plymouth Marine Laboratory";
    String keywords "buoy, CDOM, chlorophyll, chlorophyll-a, Chlorophyll_a, chromophoric, color, colored, conductivity, CTD, ctd, data, date, DateTime, depth, depth2, dissolved, dissolved o2, L4, laboratory, marine, material, matter, O2, ocean, ocean color, organic, oxygen, plymouth, pressure, salinity, sonde, temperature, time, turbidity, WCO, wco";
    String license "OGL V3";
    String licenseUrl "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/";
    String processing_level "3";
    String sourceUrl "(local files)";
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "WCO - L4 Buoy (Level 3) Conductivity, Temperature, Depth (CTD). L4 Scientific Buoy. Plymouth Marine Laboratory data from a local source.";
    String time_coverage_end "2026-01-06T10:06:34Z";
    String time_coverage_start "2025-09-30T23:04:20Z";
    String title "WCO - L4 Buoy - CTD (level 3)";
  }
}

 

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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 Data Access Protocol (DAP) and its selection constraints.

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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