ERDDAP > tabledap > Data Access Form

Dataset Title:	AVOS Motor Vessel NAMAO
Institution:	Environment and Climate Change Canada   (Dataset ID: AVOS_namao_ee8d_d94d_df77)
Information:	Summary | License | FGDC | ISO 19115 | Metadata | Background | Subset | Files | Make a graph

 

Variable	Optional Constraint #1		Optional Constraint #2		Minimum    or a List of Values	Maximum
time (Date And Time, UTC)	!= =~ <= >= = < >		!= =~ <= >= = < >		2018-04-10T14:00Z	2022-09-28T19:40Z
latitude (degrees_north)	!= =~ <= >= = < >		!= =~ <= >= = < >		50.431805	53.8476583333333
longitude (degrees_east)	!= =~ <= >= = < >		!= =~ <= >= = < >		-99.2554	-96.3790766666667
wind_speed	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	41.9
RelWindDirFrom (Wind From Direction)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	48.8
WindDirFrom (Wind From Direction)	!= =~ <= >= = < >		!= =~ <= >= = < >		0	360
air_pressure	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	1016.02
air_temperature	!= =~ <= >= = < >		!= =~ <= >= = < >		-38.3	33.8
relative_humidity	!= =~ <= >= = < >		!= =~ <= >= = < >		11	110
Temp (Temperature)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.19	28.53
platform_speed_wrt_ground	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 6.0 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7.0 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8.0 8.1 8.2 8.3 8.4 8.5 8.6 8.7 8.8 8.9 9.0 9.1 9.2 9.3 9.4 9.5 9.6 9.7 9.8 9.9 10.0 10.1 10.2 10.3 10.4 10.5 10.6 10.7 10.8 10.9 11.0 11.1 11.2 11.3 11.4 11.5 11.6 11.7 11.8 11.9 12.0 12.1 12.2 12.7 12.8 NaN
air_pressure_at_mean_sea_level	!= =~ <= >= = < >		!= =~ <= >= = < >		979.46	1048.11
platform_orientation	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	999.0

 

Server-side Functions

distinct()

orderBy orderByClosest orderByCount orderByLimit orderByMax orderByMin orderByMinMax orderByMean (" time latitude longitude wind_speed RelWindDirFrom WindDirFrom air_pressure air_temperature relative_humidity Temp platform_speed_wrt_ground air_pressure_at_mean_sea_level platform_orientation time latitude longitude wind_speed RelWindDirFrom WindDirFrom air_pressure air_temperature relative_humidity Temp platform_speed_wrt_ground air_pressure_at_mean_sea_level platform_orientation time latitude longitude wind_speed RelWindDirFrom WindDirFrom air_pressure air_temperature relative_humidity Temp platform_speed_wrt_ground air_pressure_at_mean_sea_level platform_orientation time latitude longitude wind_speed RelWindDirFrom WindDirFrom air_pressure air_temperature relative_humidity Temp platform_speed_wrt_ground air_pressure_at_mean_sea_level platform_orientation time latitude longitude wind_speed RelWindDirFrom WindDirFrom air_pressure air_temperature relative_humidity Temp platform_speed_wrt_ground air_pressure_at_mean_sea_level platform_orientation ")

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. .dataTable - A JSON file formatted for use with the Google Visualization client library (Google Charts). .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). .jsonlCSV1 - View a UTF-8 JSON Lines CSV file with column names on line 1 (mv = 'null'; times are ISO 8601 strings). .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). .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).

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.5233688e+9, 1.664394e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "Date And Time";
    String source_name "Date_and_time";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String time_precision "1970-01-01T00:00Z";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range 50.431805, 53.8476583333333;
    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";
    Float64 actual_range -99.2554, -96.3790766666667;
    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";
  }
  wind_speed {
    Float32 actual_range 0.0, 41.9;
    Float64 colorBarMaximum 15.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Wind";
    String long_name "Wind Speed";
    String standard_name "wind_speed";
  }
  RelWindDirFrom {
    Float32 actual_range 0.0, 48.8;
    Float64 colorBarMaximum 360.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Wind";
    String long_name "Wind From Direction";
    String standard_name "wind_from_direction";
  }
  WindDirFrom {
    Int16 actual_range 0, 360;
    Float64 colorBarMaximum 360.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Wind";
    String long_name "Wind From Direction";
    String standard_name "wind_from_direction";
  }
  air_pressure {
    Float32 actual_range 0.0, 1016.02;
    Float64 colorBarMaximum 1050.0;
    Float64 colorBarMinimum 950.0;
    String ioos_category "Pressure";
    String long_name "Air Pressure";
    String standard_name "air_pressure";
  }
  air_temperature {
    Float32 actual_range -38.3, 33.8;
    Float64 colorBarMaximum 40.0;
    Float64 colorBarMinimum -10.0;
    String ioos_category "Temperature";
    String long_name "Air Temperature";
    String standard_name "air_temperature";
  }
  relative_humidity {
    Byte actual_range 11, 110;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 20.0;
    String ioos_category "Meteorology";
    String long_name "Relative Humidity";
    String standard_name "relative_humidity";
  }
  Temp {
    Float32 actual_range 0.19, 28.53;
    String ioos_category "Temperature";
    String long_name "Temperature";
  }
  platform_speed_wrt_ground {
    Float32 actual_range 0.0, 12.8;
    String ioos_category "Currents";
    String long_name "Platform Speed Wrt Ground";
  }
  air_pressure_at_mean_sea_level {
    Float32 actual_range 979.46, 1048.11;
    Float64 colorBarMaximum 1050.0;
    Float64 colorBarMinimum 950.0;
    String ioos_category "Pressure";
    String long_name "Air Pressure";
    String standard_name "air_pressure";
  }
  platform_orientation {
    Float32 actual_range 0.0, 999.0;
    String ioos_category "Unknown";
    String long_name "Platform Orientation";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Point";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_name "Environment and Climate Change Canada";
    String creator_url "https://www.canada.ca/en/environment-climate-change.html";
    String Data_collection_end_date "2018-12-31";
    String Data_collection_start_date "2018-04-10";
    String Dataset_Author "Environment and Climate Change Canada";
    String Dataset_Author_Affiliation "Meteorological Service of Canada";
    String Dataset_Author_Email "Charlotte.Cockburn@ec.gc.ca";
    String Dataset_Contributor "Scott, Karen";
    String Dataset_Contributor_Afiliation "Lake Winnipeg Research Consortium";
    String Dataset_Contributor_Email "kjs@lakewinnipegresearch.org";
    String Dataset_Contributor_Role "Project Leader";
    String Dataset_Maintenance_&_Update_Frequency "Annually";
    String Dataset_Status "Complete";
    Float64 Dataset_Version 1.0;
    Float64 Easternmost_Easting -96.3790766666667;
    String featureType "Point";
    Float64 geospatial_lat_max 53.8476583333333;
    Float64 geospatial_lat_min 50.431805;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -96.3790766666667;
    Float64 geospatial_lon_min -99.2554;
    String geospatial_lon_units "degrees_east";
    String history 
"2025-07-23T08:10:46Z https://canwin-datahub.ad.umanitoba.ca/data/dataset/avos-namao/resource/d7a5b291-a0fa-4dc6-9f26-6c3bff12a423
2025-07-23T08:10:46Z http://CanWINerddap.ad.umanitoba.ca/erddap/tabledap/AVOS_namao_ee8d_d94d_df77.html";
    String infoUrl "https://canwin-datahub.ad.umanitoba.ca/data/dataset/avos-namao";
    String institution "Environment and Climate Change Canada";
    String keywords "air, air_pressure, air_pressure_corrected, air_temperature, atmosphere, atmospheric, avos, canada, change, climate, currents, data, date, direction, earth, Earth Science > Atmosphere > Atmospheric Pressure > Atmospheric Pressure Measurements, Earth Science > Atmosphere > Atmospheric Pressure > Sea Level Pressure, Earth Science > Atmosphere > Atmospheric Pressure > Static Pressure, Earth Science > Atmosphere > Atmospheric Temperature > Air Temperature, Earth Science > Atmosphere > Atmospheric Temperature > Surface Air Temperature, Earth Science > Atmosphere > Atmospheric Water Vapor > Humidity, Earth Science > Atmosphere > Atmospheric Winds > Surface Winds, environment, ground, humidity, latitude, level, longitude, measurements, meteorology, namao, orientation, platform, platform_orientation, platform_speed_wrt_ground, pressure, relative, relative_humidity, RelWindDirFrom, science, sea, seawater, speed, static, surface, Temp, temperature, time, v, vapor, water, wind, wind_from_direction, wind_speed, WindDirFrom, winds, wrt";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "Open Government Licence 2.0 - Canada";
    Float64 Northernmost_Northing 53.8476583333333;
    String Research_Area "Lake Winnipeg";
    String Sample_collection_instrument_name "AVOS";
    String sourceUrl "https://canwin-datahub.ad.umanitoba.ca/data/dataset/avos-namao/resource/d7a5b291-a0fa-4dc6-9f26-6c3bff12a423";
    Float64 Southernmost_Northing 50.431805;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String subsetVariables "platform_speed_wrt_ground";
    String summary "Automated Voluntary Observing Ship (AVOS) program meteorological data recorded aboard the M/V NAMAO. January 1st, 2010 to present.  10-minute measurements, which includes coordinates, temperature (air and water), wind (speed and direction), pressure (barometric and sea level), ship speed (knots) and orientation. This dataset is curated by CanWIN data curator and is available in CSV format.";
    String time_coverage_end "2022-09-28T19:40Z";
    String time_coverage_start "2018-04-10T14:00Z";
    String title "AVOS Motor Vessel NAMAO";
    String Type "Dataset";
    Float64 Westernmost_Easting -99.2554;
  }
}

 

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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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