ERDDAP > tabledap > Data Access Form

Dataset Title:	MI Wave Forecast at buoy locations
Institution:	Marine Institute   (Dataset ID: imiWaveBuoyForecast)
Information:	Summary | License | FGDC | ISO 19115 | Metadata | Background | Subset | Files | Make a graph

 

Variable	Optional Constraint #1		Optional Constraint #2		Minimum    or a List of Values	Maximum
time (UTC)	!= =~ <= >= = < >		!= =~ <= >= = < >		2025-10-27T00:00:00Z	2025-11-05T00:00:00Z
longitude (degrees_east)	!= =~ <= >= = < >		!= =~ <= >= = < >		-15.88 -10.55 -10.2783 -10.14618 -10.095 -10.0 -9.9324 -9.7824 -9.621628 -9.48543 -9.271 -8.2353 -6.704 -6.27973 -5.75473 -5.425
latitude (degrees_north)	!= =~ <= >= = < >		!= =~ <= >= = < >		51.2166 51.69 51.76833 52.23938 52.2925 52.54213 52.7616 53.04687 53.07 53.224 53.3327 53.48 54.23086 54.2815 54.87818 55.0
stationID	!= =~ <= >= = < >		!= =~ <= >= = < >		"Ballybunnion" "Belmullet_Inner" "Belmullet_Outer" "Brandon_Bay" "Cork_SmartBuoy" "Finnis" "Killard" "M2" "M3" "M4" "M5" "M6" "Mace_Head" "South_Hunter" "Spiddal" "Splaugh"
significant_wave_height (m)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.15869627241045237	8.97320476360619
mean_wave_period (s)	!= =~ <= >= = < >		!= =~ <= >= = < >		2.0302438642829657	10.053559998050332
mean_wave_direction (mean wave to direction, degrees)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.14282679185271263	359.8132265545428
wave_power_per_unit_crest_length (kW/m)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0488935064095303	467.00158178188815
peak_period (s)	!= =~ <= >= = < >		!= =~ <= >= = < >		2.188177	15.625477
energy_period (Wave energy period, s)	!= =~ <= >= = < >		!= =~ <= >= = < >		2.764977	13.900418
project_code	!= =~ <= >= = < >		!= =~ <= >= = < >		"BUOY"

 

Server-side Functions

distinct()

orderBy orderByClosest orderByCount orderByLimit orderByMax orderByMin orderByMinMax orderByMean (" time longitude latitude stationID significant_wave_height mean_wave_period mean_wave_direction wave_power_per_unit_crest_length peak_period energy_period project_code time longitude latitude stationID significant_wave_height mean_wave_period mean_wave_direction wave_power_per_unit_crest_length peak_period energy_period project_code time longitude latitude stationID significant_wave_height mean_wave_period mean_wave_direction wave_power_per_unit_crest_length peak_period energy_period project_code time longitude latitude stationID significant_wave_height mean_wave_period mean_wave_direction wave_power_per_unit_crest_length peak_period energy_period project_code time longitude latitude stationID significant_wave_height mean_wave_period mean_wave_direction wave_power_per_unit_crest_length peak_period energy_period project_code ")

File type: (more info) .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).

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.7615232e+9, 1.7623008e+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";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range -15.88, -5.425;
    String axis "X";
    String ioos_category "Location";
    String long_name "longitude in decimal degree east";
    String standard_name "longitude";
    String units "degrees_east";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range 51.2166, 55.0;
    String axis "Y";
    String ioos_category "Location";
    String long_name "latitude in decimal degree north";
    String standard_name "latitude";
    String units "degrees_north";
  }
  stationID {
    String cf_role "timeseries_id";
    String ioos_category "Identifier";
    String long_name "Station ID";
  }
  significant_wave_height {
    Float64 actual_range 0.15869627241045237, 8.97320476360619;
    String ioos_category "Surface Waves";
    String long_name "significant wave height";
    String units "m";
  }
  mean_wave_period {
    Float64 actual_range 2.0302438642829657, 10.053559998050332;
    String ioos_category "Surface Waves";
    String long_name "mean absolute zero-crossing period (TM02)";
    String units "s";
  }
  mean_wave_direction {
    Float64 actual_range 0.14282679185271263, 359.8132265545428;
    String ioos_category "Surface Waves";
    String long_name "mean wave to direction";
    String units "degrees";
  }
  wave_power_per_unit_crest_length {
    Float64 actual_range 0.0488935064095303, 467.00158178188815;
    String ioos_category "Surface Waves";
    String long_name "wave power per unit crest length";
    String units "kW/m";
  }
  peak_period {
    Float32 actual_range 2.188177, 15.625477;
    String comment "tp peak period";
    String ioos_category "Surface Waves";
    String long_name "sea_surface_wave_period_at_variance_spectral_density_maximum";
    String standard_name "sea_surface_wave_period_at_variance_spectral_density_maximum";
    String units "s";
  }
  energy_period {
    Float32 actual_range 2.764977, 13.900418;
    String ioos_category "Surface Waves";
    String long_name "Wave energy period";
    String standard_name "sea_surface_wave_mean_period_from_variance_spectral_density_inverse_frequency_moment";
    String units "s";
  }
  project_code {
    String ioos_category "Other";
    String long_name "project_code";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "TimeSeries";
    String cdm_timeseries_variables "stationID, longitude, latitude";
    String Conventions "COARDS, CF-1.4, Unidata Dataset Discovery v1.0";
    Float64 Easternmost_Easting -5.425;
    String featureType "TimeSeries";
    Float64 geospatial_lat_max 55.0;
    Float64 geospatial_lat_min 51.2166;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -5.425;
    Float64 geospatial_lon_min -15.88;
    String geospatial_lon_units "degrees_east";
    String history 
"2025-10-30T20:14:03Z http://www.marine.ie/
2025-10-30T20:14:03Z https://erddap.marine.ie/erddap/tabledap/imiWaveBuoyForecast.html";
    String infoUrl "http://milas.marine.ie/thredds/";
    String institution "Marine Institute";
    String keywords "Earth Science > Tide";
    String license "Creative Commons Attribution 4.0 (https://creativecommons.org/licenses/by/4.0/)";
    String Metadata_Conventions "COARDS, CF-1.4, Unidata Dataset Discovery v1.0";
    Float64 Northernmost_Northing 55.0;
    String sourceUrl "http://www.marine.ie/";
    Float64 Southernmost_Northing 51.2166;
    String subsetVariables "stationID, longitude, latitude, project_code";
    String summary "MI Wave Forecast at buoy locations";
    String time_coverage_end "2025-11-05T00:00:00Z";
    String time_coverage_start "2025-10-27T00:00:00Z";
    String title "MI Wave Forecast at buoy locations";
    Float64 Westernmost_Easting -15.88;
  }
}

 

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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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