Data Access Form

Dataset Title:	XEOS HK4 Buoy Wave Sensor
Institution:	XEOS (Dataset ID: SmartAtlantic_XEOS_hk4_buoy)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Files \| Make a graph

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Variable	Minimum	Maximum
station_name
time (Timestamp, UTC)	2019-07-19T16:20:00Z	2019-08-10T03:40:00Z

latitude (degrees_north)	44.5973	44.5973

longitude (degrees_east)	-63.5427	-63.5427

precise_lon (Precise Longitude, degrees_east)	-63.5427	-63.5427
precise_lat (Precise Latitude, degrees_north)	44.5973	44.5973
wave_ht_sig (m)	0.14	0.81
wave_period_max (s)	2.78	12.8
wave_ht_max (m)	0.24	1.4
wave_dir_avg (degree)	9	175
wave_spread_avg (Wavespread, degree)	33	46

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  station_name {
    String _Encoding "UTF-8";
    String cf_role "timeseries_id";
    String ioos_category "Identifier";
    String long_name "Station Name";
  }
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.5635532e+9, 1.5654084e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "Timestamp";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range 44.5973, 44.5973;
    String axis "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range -63.5427, -63.5427;
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  precise_lon {
    Float64 actual_range -63.5427, -63.5427;
    String ioos_category "Location";
    String long_name "Precise Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  precise_lat {
    Float64 actual_range 44.5973, 44.5973;
    String ioos_category "Location";
    String long_name "Precise Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  wave_ht_sig {
    Float32 actual_range 0.14, 0.81;
    Float64 colorBarMaximum 10.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Surface Waves";
    String long_name "Sea Surface Wave Significant Height";
    String standard_name "sea_surface_wave_significant_height";
    String units "m";
  }
  wave_period_max {
    Float32 actual_range 2.78, 12.8;
    Float64 colorBarMaximum 20.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Surface Waves";
    String long_name "Sea Surface Wave Maximum Period";
    String standard_name "sea_surface_wave_maximum_period";
    String units "s";
  }
  wave_ht_max {
    Float32 actual_range 0.24, 1.4;
    Float64 colorBarMaximum 10.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Surface Waves";
    String long_name "Sea Surface Wave Significant Height";
    String standard_name "sea_surface_wave_significant_height";
    String units "m";
  }
  wave_dir_avg {
    Int16 actual_range 9, 175;
    Float64 colorBarMaximum 360.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Surface Waves";
    String long_name "Sea Surface Wave To Direction";
    String standard_name "sea_surface_wave_to_direction";
    String units "degree";
  }
  wave_spread_avg {
    String _Unsigned "false";
    Byte actual_range 33, 46;
    String ioos_category "Surface Waves";
    String long_name "Wavespread";
    String units "degree";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "TimeSeries";
    String cdm_timeseries_variables "station_name,longitude,latitude";
    String contributor_name "Canadian Coast Guard (CCG)";
    String contributor_role "Notices to Mariners - NOTMAR, West Outer Middle Ground light buoy HK4, Red, #524.2, https://www.notmar.gc.ca/publications/list-lights/atl/a327-en";
    String Conventions "COARDS, CF-1.6, ACDD-1.3, NCCSV-1.2";
    String creator_email "dan@xeostech.com";
    String creator_name "Xeos Technologies";
    String creator_url "https://xeostech.com/";
    Float64 Easternmost_Easting -63.5427;
    String featureType "TimeSeries";
    Float64 geospatial_lat_max 44.5973;
    Float64 geospatial_lat_min 44.5973;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -63.5427;
    Float64 geospatial_lon_min -63.5427;
    String geospatial_lon_units "degrees_east";
    String history 
"2024-11-22T05:25:24Z (local files)
2024-11-22T05:25:24Z https://cioosatlantic.ca/erddap/tabledap/SmartAtlantic_XEOS_hk4_buoy.html";
    String infoUrl "https://www.smartatlantic.ca/station_alt.html?id=halifax_hk4";
    String institution "XEOS";
    String keywords "data, direction, Earth Science > Oceans > Ocean Waves > Significant Wave Height, Earth Science > Oceans > Ocean Waves > Swells, Earth Science > Oceans > Ocean Waves > Wave Period, Earth Science > Oceans > Ocean Waves > Wave Speed/Direction, height, identifier, institute, latitude, level, longitude, marine, maximumwaveheight, name, ocean, oceans, peakwaveperiod, period, sea, sea_surface_swell_wave_period, sea_surface_wave_significant_height, sea_surface_wave_to_direction, seaSurfaceHeight, significant, significantwaveheight, speed, station, station_name, surface, surface waves, swell, swells, time, timestamp, wave, wavedirection, waves, wavespread, xeos";
    String keywords_fra "seaSurfaceHeight";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "https://creativecommons.org/licenses/by/4.0/";
    Float64 Northernmost_Northing 44.5973;
    String platform "moored surface buoy";
    String platform_vocabulary "https://vocab.nerc.ac.uk/collection/L06/current/";
    String project "SmartAtlantic";
    String publisher_email "SmartBay@smartbay.ca";
    String publisher_name "SmartAtlantic";
    String publisher_url "https://www.smartatlantic.ca/";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 44.5973;
    String standard_name_vocabulary "CF Standard Name Table v79";
    String summary 
"The Brizo is a GNSS-based, directional wave height sensor. Developed by Xeos Technologies, it is a breakthrough product on the market that provides significant wave height, maximum wave height, peak wave period, average wave direction, and average wave spread. It was installed on the HK4 navigational buoy in the Halifax Harbour near Meagher's Beach.

When the Port Authority raised a need for capturing wave data at this location, Xeos Technologies was happy to provide and install its own wave height sensor for the SmartAtlantic project. It is an opportunity to aid in the environmental monitoring of harbor conditions.";
    String summary_fra "Le Brizo est un capteur de hauteur d'onde directionnel basé sur GNSS. Développé par Xeos Technologies, il s'agit d'un produit révolutionnaire sur le marché qui offre une hauteur de vague importante, une hauteur maximale des vagues, une période de pointe, une direction moyenne des vagues et une propagation moyenne des vagues. Elle a été installée sur la bouée de navigation HK4 dans le port d'Halifax, près de Meagher's Beach.  \\n \\nLorsque l'administration portuaire a soulevé le besoin de saisir les données sur les vagues à cet endroit, Xeos Technologies était heureuse de fournir et d'installer son propre capteur de hauteur des vagues pour le projet SmartAtlantic. Il s'agit d'une occasion de contribuer à la surveillance environnementale des conditions portuaires.";
    String time_coverage_end "2019-08-10T03:40:00Z";
    String time_coverage_start "2019-07-19T16:20:00Z";
    String title "XEOS HK4 Buoy Wave Sensor";
    String title_fra "XEOS HK4 Bouoy Wave Sensor";
    String uuid "d0476230-124e-4a03-b164-3b1be73af1aa";
    Float64 Westernmost_Easting -63.5427;
  }
}

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.

(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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