ERDDAP > tabledap > Data Access Form

Dataset Title:	44258 - Halifax Harbour
Institution:	Environment Canada   (Dataset ID: ca_weather_44258)
Information:	Summary | License | FGDC | ISO 19115 | Metadata | Background | Make a graph

 

Variable	Optional Constraint #1		Optional Constraint #2		Minimum	Maximum
time (UTC)	!= =~ <= >= = < >		!= =~ <= >= = < >		2015-05-05T13:00:00Z	2019-07-22T01:00:00Z
latitude (degrees_north)	!= =~ <= >= = < >		!= =~ <= >= = < >		44.5	44.5
longitude (degrees_east)	!= =~ <= >= = < >		!= =~ <= >= = < >		-63.4	-63.4
z (m)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	0.0
air_temperature (degree_Celsius)	!= =~ <= >= = < >		!= =~ <= >= = < >
air_pressure (Barometric Pressure, millibars)	!= =~ <= >= = < >		!= =~ <= >= = < >
sea_water_temperature (degree_Celsius)	!= =~ <= >= = < >		!= =~ <= >= = < >
sea_surface_dominant_wave_period (s)	!= =~ <= >= = < >		!= =~ <= >= = < >
sea_surface_wave_significant_height (m)	!= =~ <= >= = < >		!= =~ <= >= = < >
wind_speed_of_gust (Wind Gust, mile.hour-1)	!= =~ <= >= = < >		!= =~ <= >= = < >
wind_speed (m.s-1)	!= =~ <= >= = < >		!= =~ <= >= = < >
wind_from_direction (degrees)	!= =~ <= >= = < >		!= =~ <= >= = < >
station (44258 - Halifax Harbour)	!= =~ <= >= = < >		!= =~ <= >= = < >

 

Server-side Functions

distinct()

orderBy orderByClosest orderByCount orderByLimit orderByMax orderByMin orderByMinMax (" time latitude longitude z air_temperature air_pressure sea_water_temperature sea_surface_dominant_wave_period sea_surface_wave_significant_height wind_speed_of_gust wind_speed wind_from_direction station time latitude longitude z air_temperature air_pressure sea_water_temperature sea_surface_dominant_wave_period sea_surface_wave_significant_height wind_speed_of_gust wind_speed wind_from_direction station time latitude longitude z air_temperature air_pressure sea_water_temperature sea_surface_dominant_wave_period sea_surface_wave_significant_height wind_speed_of_gust wind_speed wind_from_direction station time latitude longitude z air_temperature air_pressure sea_water_temperature sea_surface_dominant_wave_period sea_surface_wave_significant_height wind_speed_of_gust wind_speed wind_from_direction station time latitude longitude z air_temperature air_pressure sea_water_temperature sea_surface_dominant_wave_period sea_surface_wave_significant_height wind_speed_of_gust wind_speed wind_from_direction station ")

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. .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). .jsonlCSV - View a UTF-8 JSON Lines CSV file (missing value = '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).

(Documentation / Bypass this form )
 
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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.4308308e+9, 1.5637572e+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";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range 44.5, 44.5;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range -63.4, -63.4;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  z {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "up";
    Float64 actual_range 0.0, 0.0;
    String axis "Z";
    String ioos_category "Location";
    String long_name "Z";
    String positive "up";
    String standard_name "height";
    String units "m";
  }
  air_temperature {
    Float64 _FillValue -9999.99;
    String id "351157";
    String ioos_category "Other";
    String long_name "Air Temperature";
    Float64 missing_value -9999.99;
    String platform "station";
    String standard_name "air_temperature";
    String units "degree_Celsius";
    String urn "http://mmisw.org/ont/cf/parameter/air_temperature";
  }
  air_pressure {
    Float64 _FillValue -9999.99;
    String id "351161";
    String ioos_category "Other";
    String long_name "Barometric Pressure";
    Float64 missing_value -9999.99;
    String platform "station";
    String standard_name "air_pressure";
    String units "millibars";
    String urn "http://mmisw.org/ont/cf/parameter/air_pressure";
  }
  sea_water_temperature {
    Float64 _FillValue -9999.99;
    String id "452232";
    String ioos_category "Other";
    String long_name "Water Temperature";
    Float64 missing_value -9999.99;
    String platform "station";
    String standard_name "sea_water_temperature";
    String units "degree_Celsius";
    String urn "http://mmisw.org/ont/cf/parameter/sea_water_temperature";
  }
  sea_surface_dominant_wave_period {
    Float64 _FillValue -9999.99;
    String id "351163";
    String ioos_category "Other";
    String long_name "Dominant Wave Period";
    Float64 missing_value -9999.99;
    String platform "station";
    String standard_name "sea_surface_dominant_wave_period";
    String units "s";
    String urn "http://mmisw.org/ont/fake/parameter/sea_surface_dominant_wave_period";
  }
  sea_surface_wave_significant_height {
    Float64 _FillValue -9999.99;
    String id "351162";
    String ioos_category "Other";
    String long_name "Significant Wave Height";
    Float64 missing_value -9999.99;
    String platform "station";
    String standard_name "sea_surface_wave_significant_height";
    String units "m";
    String urn "http://mmisw.org/ont/cf/parameter/sea_surface_wave_significant_height";
  }
  wind_speed_of_gust {
    Float64 _FillValue -9999.99;
    String id "351159";
    String ioos_category "Other";
    String long_name "Wind Gust";
    Float64 missing_value -9999.99;
    String platform "station";
    String standard_name "wind_speed_of_gust";
    String units "mile.hour-1";
    String urn "http://mmisw.org/ont/cf/parameter/wind_speed_of_gust";
  }
  wind_speed {
    Float64 _FillValue -9999.99;
    String id "351158";
    String ioos_category "Other";
    String long_name "Wind Speed";
    Float64 missing_value -9999.99;
    String platform "station";
    String standard_name "wind_speed";
    String units "m.s-1";
    String urn "http://mmisw.org/ont/cf/parameter/wind_speed";
  }
  wind_from_direction {
    Float64 _FillValue -9999.99;
    String id "351160";
    String ioos_category "Other";
    String long_name "Wind From Direction";
    Float64 missing_value -9999.99;
    String platform "station";
    String standard_name "wind_from_direction";
    String units "degrees";
    String urn "http://mmisw.org/ont/cf/parameter/wind_from_direction";
  }
  station {
    String cf_role "timeseries_id";
    String ioos_category "Identifier";
    String ioos_code "urn:ioos:station:com.axiomdatascience:48058";
    String long_name "44258 - Halifax Harbour";
    String short_name "urn:ioos:station:ca.weather:44258";
    String type "buoy";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "TimeSeries";
    String cdm_timeseries_variables "air_temperature,air_pressure,sea_water_temperature,sea_surface_dominant_wave_period,sea_surface_wave_significant_height,wind_speed_of_gust,wind_speed,wind_from_direction";
    String contributor_email ",info@neracoos.org ,feedback@axiomdatascience.com";
    String contributor_name "World Meteorological Organization (WMO),Northeastern Regional Association of Coastal Ocean Observing Systems (NERACOOS),Axiom Data Science";
    String contributor_role "contributor,funder,processor";
    String contributor_role_vocabulary "CI_RoleCode";
    String contributor_url "https://www.wmo.int/pages/prog/amp/mmop/wmo-number-rules.html,http://www.neracoos.org/,https://www.axiomdatascience.com";
    String Conventions "IOOS-1.2, CF-1.6, ACDD-1.3, NCCSV-1.0";
    String creator_country "CAN";
    String creator_email "None";
    String creator_institution "Environment Canada";
    String creator_name "Environment Canada";
    String creator_sector "gov_federal";
    String creator_type "institution";
    String creator_url "https://weather.gc.ca/canada_e.html";
    Float64 Easternmost_Easting -63.4;
    String featureType "TimeSeries";
    Float64 geospatial_lat_max 44.5;
    Float64 geospatial_lat_min 44.5;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -63.4;
    Float64 geospatial_lon_min -63.4;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 0.0;
    Float64 geospatial_vertical_min 0.0;
    String geospatial_vertical_positive "up";
    String geospatial_vertical_units "m";
    String history 
"Downloaded from NOAA National Data Buoy Center (NDBC) at 
2019-07-22T06:07:26Z https://sensors.axds.co/api/
2019-07-22T06:07:26Z http://erddap.sensors.ioos.us/erddap/tabledap/ca_weather_44258.html";
    Int32 id 48058;
    String info_url "https://sensors.ioos.us/?sensor_version=v2#metadata/48058/station";
    String infoUrl "https://sensors.ioos.us/?sensor_version=v2#metadata/48058/station";
    String institution "Environment Canada";
    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.";
    String naming_authority "com.axiomdatascience";
    Float64 Northernmost_Northing 44.5;
    String platform "buoy";
    String platform_vocabulary "http://mmisw.org/ont/ioos/platform";
    String publisher_country "USA";
    String publisher_email "webmaster.ndbc@noaa.gov";
    String publisher_institution "NOAA National Data Buoy Center (NDBC)";
    String publisher_name "NOAA National Data Buoy Center (NDBC)";
    String publisher_sector "gov_federal";
    String publisher_type "institution";
    String publisher_url "http://www.ndbc.noaa.gov/";
    String references "https://www.ndbc.noaa.gov/station_page.php?station=44258,,";
    String sourceUrl "https://sensors.axds.co/api/";
    Float64 Southernmost_Northing 44.5;
    String standard_name_vocabulary "NetCDF Climate and Forecast (CF) Metadata Convention Standard Name";
    String summary "Timeseries data from '44258 - Halifax Harbour' (urn:ioos:station:ca.weather:44258)";
    String time_coverage_end "2019-07-22T01:00:00Z";
    String time_coverage_start "2015-05-05T13:00:00Z";
    String title "44258 - Halifax Harbour";
    Float64 Westernmost_Easting -63.4;
  }
}

 

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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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