ERDDAP > tabledap > Data Access Form

Dataset Title:	Codar Radials Medway Head (NetCDF)
Institution:	OFI   (Dataset ID: codar_radial_medh_netcdf)
Information:	Summary | License | FGDC | ISO 19115 | Metadata | Background | Files | Make a graph

 

Variable	Optional Constraint #1		Optional Constraint #2		Minimum	Maximum
time (UTC)	!= =~ <= >= = < >		!= =~ <= >= = < >		2022-07-26T17:00:00.000Z	2025-12-11T08:00:00.000Z
latitude (degrees_north)	!= =~ <= >= = < >		!= =~ <= >= = < >		42.2678628	45.9374458
longitude (degrees_east)	!= =~ <= >= = < >		!= =~ <= >= = < >		-65.3859251	-61.9927977
bearing	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	359.0
range	!= =~ <= >= = < >		!= =~ <= >= = < >		5.8249	203.8715
u_comp	!= =~ <= >= = < >		!= =~ <= >= = < >		-146.183	146.297
v_comp	!= =~ <= >= = < >		!= =~ <= >= = < >		-143.398	149.321
velocity_maximum	!= =~ <= >= = < >		!= =~ <= >= = < >		-149.417	153.393
velocity_minimum	!= =~ <= >= = < >		!= =~ <= >= = < >		-158.331	146.811
spatial_count	!= =~ <= >= = < >		!= =~ <= >= = < >		1	134
temporal_count	!= =~ <= >= = < >		!= =~ <= >= = < >		2	5
x_distance	!= =~ <= >= = < >		!= =~ <= >= = < >		-69.7282	203.8715
y_distance	!= =~ <= >= = < >		!= =~ <= >= = < >		-203.8715	203.8715
velocity	!= =~ <= >= = < >		!= =~ <= >= = < >		-149.417	146.811
direction	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	359.0
spectra_rngcell	!= =~ <= >= = < >		!= =~ <= >= = < >		1.0	35.0

 

Server-side Functions

distinct()

orderBy orderByDescending orderByClosest orderByCount orderByLimit orderByMax orderByMin orderByMinMax orderByMean orderBySum (" time latitude longitude bearing range u_comp v_comp velocity_maximum velocity_minimum spatial_count temporal_count x_distance y_distance velocity direction spectra_rngcell time latitude longitude bearing range u_comp v_comp velocity_maximum velocity_minimum spatial_count temporal_count x_distance y_distance velocity direction spectra_rngcell time latitude longitude bearing range u_comp v_comp velocity_maximum velocity_minimum spatial_count temporal_count x_distance y_distance velocity direction spectra_rngcell time latitude longitude bearing range u_comp v_comp velocity_maximum velocity_minimum spatial_count temporal_count x_distance y_distance velocity direction spectra_rngcell time latitude longitude bearing range u_comp v_comp velocity_maximum velocity_minimum spatial_count temporal_count x_distance y_distance velocity direction spectra_rngcell ")

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

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  time {
    UInt32 _ChunkSizes 512;
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.6588548e+9, 1.76544e+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 time_precision "1970-01-01T00:00:00.000Z";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  latitude {
    UInt32 _ChunkSizes 512;
    String _CoordinateAxisType "Lat";
    Float64 actual_range 42.2678628, 45.9374458;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    UInt32 _ChunkSizes 512;
    String _CoordinateAxisType "Lon";
    Float64 actual_range -65.3859251, -61.9927977;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  bearing {
    Float64 actual_range 0.0, 359.0;
  }
  range {
    Float64 actual_range 5.8249, 203.8715;
  }
  u_comp {
    Float64 actual_range -146.183, 146.297;
  }
  v_comp {
    Float64 actual_range -143.398, 149.321;
  }
  velocity_maximum {
    Float64 actual_range -149.417, 153.393;
  }
  velocity_minimum {
    Float64 actual_range -158.331, 146.811;
  }
  spatial_count {
    Int32 actual_range 1, 134;
  }
  temporal_count {
    Int32 actual_range 2, 5;
  }
  x_distance {
    Float64 actual_range -69.7282, 203.8715;
  }
  y_distance {
    Float64 actual_range -203.8715, 203.8715;
  }
  velocity {
    Float64 actual_range -149.417, 146.811;
  }
  direction {
    Float64 actual_range 0.0, 359.0;
  }
  spectra_rngcell {
    Float64 actual_range 1.0, 35.0;
  }
 }
  NC_GLOBAL {
    String _NCProperties "version=2,netcdf=4.9.3,hdf5=1.14.6";
    String cdm_data_type "Point";
    String Conventions "CF-1.6";
    String creator_name "OFI RIU";
    Float64 Easternmost_Easting -61.9927977;
    String featureType "Point";
    Float64 geospatial_lat_max 45.9374458;
    Float64 geospatial_lat_min 42.2678628;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -61.9927977;
    Float64 geospatial_lon_min -65.3859251;
    String geospatial_lon_units "degrees_east";
    String history 
"2025-12-12T09:11:27Z (local files)
2025-12-12T09:11:27Z http://deverddap.ceotr.ca//erddap/tabledap/codar_radial_medh_netcdf.html";
    String infoUrl "https://ceotr.ocean.dal.ca/codar/map";
    String institution "OFI";
    String keywords "bearing";
    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 45.9374458;
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 42.2678628;
    String standard_name_vocabulary "CF Standard Name Table v79";
    String summary "CODAR radial measurements captured at Medway Head (MEDH) written to NetCDF files.";
    String time_coverage_end "2025-12-11T08:00:00.000Z";
    String time_coverage_start "2022-07-26T17:00:00.000Z";
    String title "Codar Radials Medway Head (NetCDF)";
    Float64 Westernmost_Easting -65.3859251;
  }
}

 

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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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