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Dataset Title:  Surface Currents (Radials), HF Radar, Sandy Cove Station, Halifax, CA East
Coast, NRT, 2015-present, Hourly Subscribe RSS
Institution:  Ocean Frontier Institute   (Dataset ID: codar_radial_scov_2015)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Subset | Files | Make a graph
 
Variable ?   Optional
Constraint #1 ? 		Optional
Constraint #2 ? 		   Minimum ?
   or a List of Values ? 		   Maximum ?
 
 time (UTC) ?          2015-12-18T18:00:00.000Z    2025-12-16T11:00:00.000Z
  < slider >
 latitude (degrees_north) ?          42.6334138    45.9421979
  < slider >
 longitude (degrees_east) ?          -66.0696304    -60.989713
  < slider >
 VELU (cm/s) ?          -145.014    145.311
 VELV (cm/s) ?          -146.052    146.461
 VELO (speed, cm/s) ?          -149.417    148.456
 HEAD (direction, degree) ?          0.0    358.1
 station ?      
   - +  ?
 antenna_lat (degrees_north) ?      
   - +  ?
 antenna_lon (degrees_east) ?      
   - +  ?
 
Server-side Functions ?
 distinct() ?
? ("Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.")

File type: (more information)

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.4504616e+9, 1.7658828e+9;
    String axis "T";
    String identifier "timestamp";
    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 {
    String _CoordinateAxisType "Lat";
    Float64 actual_range 42.6334138, 45.9421979;
    String axis "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String identifier "latitude";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range -66.0696304, -60.989713;
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String identifier "longitude";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  VELU {
    Float64 actual_range -145.014, 145.311;
    Float64 colorBarMaximum 0.5;
    Float64 colorBarMinimum -0.5;
    String identifier "u_comp";
    String ioos_category "Currents";
    String long_name "Eastward component of surface current (cm/s)";
    String standard_name "surface_eastward_sea_water_velocity";
    String units "cm/s";
    String vocabulary "https://vocab.nerc.ac.uk/collection/P07/current/CFSN0266/";
  }
  VELV {
    Float64 actual_range -146.052, 146.461;
    Float64 colorBarMaximum 0.5;
    Float64 colorBarMinimum -0.5;
    String identifier "v_comp";
    String ioos_category "Currents";
    String long_name "Northward component of surface current (cm/s)";
    String standard_name "surface_northward_sea_water_velocity";
    String units "cm/s";
    String vocabulary "https://vocab.nerc.ac.uk/collection/P07/current/CFSN0242/";
  }
  VELO {
    Float64 actual_range -149.417, 148.456;
    Float64 colorBarMaximum 0.5;
    Float64 colorBarMinimum -0.5;
    String identifier "velocity";
    String ioos_category "Currents";
    String long_name "speed";
    String standard_name "radial_sea_water_velocity_toward_instrument";
    String units "cm/s";
    String vocabulary "https://vocab.nerc.ac.uk/standard_name/radial_sea_water_velocity_toward_instrument/";
  }
  HEAD {
    Float64 actual_range 0.0, 358.1;
    Float64 colorBarMaximum 360.0;
    Float64 colorBarMinimum 0.0;
    String identifier "direction";
    String ioos_category "Currents";
    String long_name "direction";
    String standard_name "direction_of_radial_vector_toward_instrument";
    String units "degree";
    String vocabulary "https://vocab.nerc.ac.uk/standard_name/direction_of_radial_vector_away_from_instrument/";
  }
  station {
    String constant "SCOV";
    String ioos_category "Identifier";
    String long_name "station";
  }
  antenna_lat {
    Float64 actual_range 44.4684, 44.4684;
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    Float64 constant 44.4684;
    String ioos_category "Location";
    String long_name "latitude of origin of radial coordinate system";
    String standard_name "latitude";
    String units "degrees_north";
  }
  antenna_lon {
    Float64 actual_range -63.5522, -63.5522;
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    Float64 constant -63.5522;
    String ioos_category "Location";
    String long_name "longitude of origin of radial coordinate system";
    String standard_name "longitude";
    String units "degrees_east";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Point";
    String Conventions "CF-1.12, COARDS, ACDD-1.3";
    String creator_country "Canada";
    String creator_institution "Ocean Frontier Institute";
    String creator_name "RIU; Ocean Frontier Institute";
    String creator_type "institution";
    String creator_url "https://www.ofi.ca";
    Float64 Easternmost_Easting -60.989713;
    String featureType "Point";
    Float64 geospatial_lat_max 45.9421979;
    Float64 geospatial_lat_min 42.6334138;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -60.989713;
    Float64 geospatial_lon_min -66.0696304;
    String geospatial_lon_units "degrees_east";
    String history 
"2026-01-29T10:44:53Z (local files)
2026-01-29T10:44:53Z http://deverddap.ceotr.ca//erddap/tabledap/codar_radial_scov_2015.html";
    String id "codar_radial_scov_2015";
    String infoUrl "https://www.ofi.ca";
    String institution "Ocean Frontier Institute";
    String keywords "2015-present, antenna_lat, antenna_lon, applications, circulation, cm/s, coast, coastal, codar, component, coordinate, cove, current, currents, data, direction, direction_of_radial_vector_toward_instrument, dynamics, earth, Earth Science > Oceans > Ocean Circulation > Ocean Currents, east, east coast, eastward, frequency, halifax, HEAD, HF, hf radar, hfradar, high, hour, hourly, identifier, instrument, latitude, longitude, near, northward, nrt, ocean, oceans, ofi, origin, radar, radial, radial_sea_water_velocity_toward_instrument, radials, real, sandy, science, sea, seawater, speed, station, surface, surface_eastward_sea_water_velocity, surface_northward_sea_water_velocity, system, time, toward, vector, VELO, velocity, VELU, VELV, water";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "This data may be redistributed and used without restriction.";
    Float64 Northernmost_Northing 45.9421979;
    String platform "surface_current_radar";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 42.6334138;
    String standard_name_vocabulary "CF Standard Name Table v79";
    String subsetVariables "station, antenna_lat, antenna_lon";
    String summary "Coastal Ocean Dynamics Applications Radar (CODAR) radial measurements capture surface current vectors from a single site. Data are collected at Sandy Cove (SCOV) and include quality and geometry metrics for each vector.";
    String time_coverage_end "2025-12-16T11:00:00.000Z";
    String time_coverage_start "2015-12-18T18:00:00.000Z";
    String title "Surface Currents (Radials), HF Radar, Sandy Cove Station, Halifax, CA East Coast, NRT, 2015-present, Hourly";
    Float64 Westernmost_Easting -66.0696304;
  }
}

 

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.

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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