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Dataset Title:  HF Radar Radial Surface Ocean Velocity - L2B Subscribe RSS
Institution:  ICATMAR   (Dataset ID: HF_Radar_L2B)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Data Access Form | Files
 
Graph Type:  ?
X Axis: 
Y Axis: 
Color: 
-1+1
 
Constraints ? Optional
Constraint #1 ? 		Optional
Constraint #2 ?
       
       
       
       
       
 
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.")
 
Graph Settings
Marker Type:   Size: 
Color: 
Color Bar:   Continuity:   Scale: 
   Minimum:   Maximum:   N Sections: 
Draw land mask: 
Y Axis Minimum:   Maximum:   
 
(Please be patient. It may take a while to get the data.)
 
Optional:
Then set the File Type: (File Type information)
and
or view the URL:
(Documentation / Bypass this form ? )
    Click on the map to specify a new center point. ?
Zoom: 
Time range:           -   +  
[The graph you specified. Please be patient.]

 

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:

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  longitude {
    String _CoordinateAxisType "Lon";
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  VELU {
    String ioos_category "Currents";
    String long_name "U Component of Current Velocity";
    String units "cm/s";
  }
  VELV {
    String ioos_category "Currents";
    String long_name "V Component of Current Velocity";
    String units "cm/s";
  }
  VFLG {
    String ioos_category "Quality";
    String long_name "Vector Flag";
  }
  ESPC {
    String ioos_category "Quality";
    String long_name "Spatial Quality";
  }
  ETMP {
    String ioos_category "Quality";
    String long_name "Temporal Quality";
  }
  EDTP {
    String ioos_category "Quality";
    String long_name "Pattern Distance";
  }
  EASN {
    String ioos_category "Quality";
    String long_name "SNR";
    String units "dB";
  }
  MAXV {
    String ioos_category "Currents";
    String long_name "Maximum Velocity";
    String units "cm/s";
  }
  MINV {
    String ioos_category "Currents";
    String long_name "Minimum Velocity";
    String units "cm/s";
  }
  ERSC {
    String ioos_category "Statistics";
    String long_name "Spatial Count";
  }
  ERTC {
    String ioos_category "Statistics";
    String long_name "Temporal Count";
  }
  XDST {
    String ioos_category "Location";
    String long_name "X Distance";
    String units "km";
  }
  YDST {
    String ioos_category "Location";
    String long_name "Y Distance";
    String units "km";
  }
  RNGE {
    String ioos_category "Location";
    String long_name "Range";
    String units "km";
  }
  BEAR {
    String ioos_category "Location";
    String long_name "Bearing";
    String units "degrees";
  }
  VELO {
    String ioos_category "Currents";
    String long_name "Radial Velocity";
    String units "cm/s";
  }
  HEAD {
    String ioos_category "Currents";
    String long_name "Direction";
    String units "degrees";
  }
  SPRC {
    String ioos_category "Statistics";
    String long_name "Spectra Range Cell";
  }
  Q201 {
    String ioos_category "Quality";
    String long_name "QARTOD Syntax";
  }
  Q203 {
    String ioos_category "Quality";
    String long_name "QARTOD Valid Location";
  }
  Q202 {
    String ioos_category "Quality";
    String long_name "QARTOD Maximum Velocity";
  }
  Q206 {
    String ioos_category "Quality";
    String long_name "QARTOD Temporal Gradient";
  }
  Q205 {
    String ioos_category "Quality";
    String long_name "QARTOD Spatial Median";
  }
  Q207 {
    String ioos_category "Quality";
    String long_name "QARTOD Avg Radial Bearing";
  }
  Q204 {
    String ioos_category "Quality";
    String long_name "QARTOD Radial Count";
  }
  PRIM {
    String ioos_category "Quality";
    String long_name "Primary Flag";
  }
  time {
    String _CoordinateAxisType "Time";
    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";
  }
  station {
    String cf_role "timeseries_id";
    String ioos_category "Identifier";
    String long_name "Station ID";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "TimeSeries";
    String cdm_timeseries_variables "station, latitude, longitude";
    String Conventions "COARDS, CF-1.10, ACDD-1.3";
    String creator_name "ICATMAR";
    String creator_type "institution";
    String featureType "TimeSeries";
    String geospatial_lat_units "degrees_north";
    String geospatial_lon_units "degrees_east";
    String history 
"2026-04-18T12:06:07Z (local files)
2026-04-18T12:06:07Z https://hebe.icm.csic.es/tabledap/HF_Radar_L2B.das";
    String infoUrl "https://www.icatmar.cat/";
    String institution "ICATMAR";
    String keywords "hf radar, icatmar, near real time, ocean, radial, surface current, velocity";
    String license 
"This
        dataset by ICATMAR is licensed under a Creative Commons Attribution 4.0
        International License. You should have received a copy of the license along with this work.
        If not, see https://creativecommons.org/licenses/by/4.0/.";
    String sourceUrl "(local files)";
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "Near Real Time HF Radar Radial Surface Ocean Velocity (Level 2B)";
    String title "HF Radar Radial Surface Ocean Velocity - L2B";
  }
}

 

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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