ERDDAP > tabledap > Data Access Form

Dataset Title:	Adak WhiteAlice
Institution:	Marine Exchange of Alaska (MXAK)   (Dataset ID: org_mxak_adak_whitealice)
Information:	Summary | License | FGDC | ISO 19115 | Metadata | Background | Make a graph

 

Variable	Optional Constraint #1		Optional Constraint #2		Minimum	Maximum
time (UTC)	!= =~ <= >= = < >		!= =~ <= >= = < >		2015-05-05T13:50:00Z	2017-11-06T09:30:00Z
latitude (degrees_north)	!= =~ <= >= = < >		!= =~ <= >= = < >		51.871716	51.871716
longitude (degrees_east)	!= =~ <= >= = < >		!= =~ <= >= = < >		-176.706084	-176.706084
z (Altitude, m)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	0.0
air_pressure (Barometric Pressure, millibars)	!= =~ <= >= = < >		!= =~ <= >= = < >		924.0	1039.6
dew_point_temperature (degree_Celsius)	!= =~ <= >= = < >		!= =~ <= >= = < >		-24.221999999999998	65.722
relative_humidity (%)	!= =~ <= >= = < >		!= =~ <= >= = < >		6.4	97.4
air_temperature (degree_Celsius)	!= =~ <= >= = < >		!= =~ <= >= = < >		-9.7778	56.111000000000004
wind_speed_of_gust (Wind Gust, mile.hour-1)	!= =~ <= >= = < >		!= =~ <= >= = < >		1.496	114.96
wind_gust_from_direction (degrees)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	359.9
wind_speed (m.s-1)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.25722	49.129
wind_from_direction (degrees)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	359.9
station (Adak WhiteAlice)	!= =~ <= >= = < >		!= =~ <= >= = < >

 

Server-side Functions

distinct()

orderBy orderByDescending orderByClosest orderByCount orderByLimit orderByMax orderByMin orderByMinMax orderByMean orderBySum (" time latitude longitude z air_pressure dew_point_temperature relative_humidity air_temperature wind_speed_of_gust wind_gust_from_direction wind_speed wind_from_direction station time latitude longitude z air_pressure dew_point_temperature relative_humidity air_temperature wind_speed_of_gust wind_gust_from_direction wind_speed wind_from_direction station time latitude longitude z air_pressure dew_point_temperature relative_humidity air_temperature wind_speed_of_gust wind_gust_from_direction wind_speed wind_from_direction station time latitude longitude z air_pressure dew_point_temperature relative_humidity air_temperature wind_speed_of_gust wind_gust_from_direction wind_speed wind_from_direction station time latitude longitude z air_pressure dew_point_temperature relative_humidity air_temperature wind_speed_of_gust wind_gust_from_direction wind_speed wind_from_direction station ")

File type: (more information) .asc - View OPeNDAP-style ISO-8859-1 comma-separated text. .croissant - Download the dataset croissant schema. .csv - Download a ISO-8859-1 comma-separated text table (line 1: names; line 2: units; ISO 8601 times). .csv0 - Download a ISO-8859-1 .csv file without column names or units. Times are ISO 8601 strings. .csvp - Download a ISO-8859-1 .csv file with line 1: name (units). Times are ISO 8601 strings. .das - View the dataset's metadata via an ISO-8859-1 OPeNDAP Dataset Attribute Structure (DAS). .dataTable - A JSON file formatted for use with the Google Visualization client library (Google Charts). .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. .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 19115/19139 UTF-8 .xml metadata using the version default for this server. .iso19115_2 - View the dataset's ISO 19115-2/19139 UTF-8 .xml metadata. .iso19115_3_2016 - View the dataset's ISO 19115-3:2016 UTF-8 .xml metadata. .iso19139_2007 - View the dataset's ISO 19139:2007 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 without column names (mv = '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). .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. .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. .ncHeader - View the UTF-8 header (the metadata) for the NetCDF-3 .nc 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). .parquet - Download as a parquet file. Metadata contains column names ("column_names") and units ("column_units"). .parquetWMeta - Download as a parquet file with detailed metadata. .tsv - Download a ISO-8859-1 tab-separated text table (line 1: names; line 2: units; ISO 8601 times). .tsv0 - Download a ISO-8859-1 .tsv file without column names or units. Times are ISO 8601 strings. .tsvp - Download a ISO-8859-1 .tsv file with line 1: name (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. .largePdf - View a large .pdf image file with a graph or map. .largePng - View a large .png image file with a graph or map. .pdf - View a standard, medium-sized .pdf image file with a graph or map. .png - View a standard, medium-sized .png image file with a graph or map. .smallPdf - View a small .pdf image file with a graph or map. .smallPng - View a small .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 {
    UInt32 _ChunkSizes 124195;
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.4308338e+9, 1.5099606e+9;
    String axis "T";
    String calendar "gregorian";
    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 51.871716, 51.871716;
    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 -176.706084, -176.706084;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  z {
    UInt32 _ChunkSizes 1;
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "up";
    Float64 actual_range 0.0, 0.0;
    String axis "Z";
    String ioos_category "Location";
    Float64 least_significant_digit 2;
    String long_name "Altitude";
    String positive "up";
    String standard_name "altitude";
    String units "m";
  }
  air_pressure {
    UInt32 _ChunkSizes 124195, 1;
    Float64 _FillValue -9999.0;
    Float64 actual_range 924.0, 1039.6;
    String id "1014462";
    String ioos_category "Pressure";
    String long_name "Barometric Pressure";
    Float64 missing_value -9999.0;
    String platform "station";
    String standard_name "air_pressure";
    String standard_name_url "http://mmisw.org/ont/cf/parameter/air_pressure";
    String units "millibars";
  }
  dew_point_temperature {
    UInt32 _ChunkSizes 124195, 1;
    Float64 _FillValue -9999.0;
    Float64 actual_range -24.221999999999998, 65.722;
    String id "1014463";
    String ioos_category "Temperature";
    String long_name "Dew Point";
    Float64 missing_value -9999.0;
    String platform "station";
    String standard_name "dew_point_temperature";
    String standard_name_url "http://mmisw.org/ont/cf/parameter/dew_point_temperature";
    String units "degree_Celsius";
  }
  relative_humidity {
    UInt32 _ChunkSizes 124195, 1;
    Float64 _FillValue -9999.0;
    Float64 actual_range 6.4, 97.4;
    String id "1014460";
    String ioos_category "Meteorology";
    String long_name "Relative Humidity";
    Float64 missing_value -9999.0;
    String platform "station";
    String standard_name "relative_humidity";
    String standard_name_url "http://mmisw.org/ont/cf/parameter/relative_humidity";
    String units "%";
  }
  air_temperature {
    UInt32 _ChunkSizes 124195, 1;
    Float64 _FillValue -9999.0;
    Float64 actual_range -9.7778, 56.111000000000004;
    String id "1014459";
    String ioos_category "Temperature";
    String long_name "Air Temperature";
    Float64 missing_value -9999.0;
    String platform "station";
    String standard_name "air_temperature";
    String standard_name_url "http://mmisw.org/ont/cf/parameter/air_temperature";
    String units "degree_Celsius";
  }
  wind_speed_of_gust {
    UInt32 _ChunkSizes 124195, 1;
    Float64 _FillValue -9999.0;
    Float64 actual_range 1.496, 114.96;
    String id "1014465";
    String ioos_category "Wind";
    String long_name "Wind Gust";
    Float64 missing_value -9999.0;
    String platform "station";
    String standard_name "wind_speed_of_gust";
    String standard_name_url "http://mmisw.org/ont/cf/parameter/wind_speed_of_gust";
    String units "mile.hour-1";
  }
  wind_gust_from_direction {
    UInt32 _ChunkSizes 124195, 1;
    Float64 _FillValue -9999.0;
    Float64 actual_range 0.0, 359.9;
    String id "1014466";
    String ioos_category "Wind";
    String long_name "Wind Gust From Direction";
    Float64 missing_value -9999.0;
    String platform "station";
    String standard_name "wind_gust_from_direction";
    String standard_name_url "http://mmisw.org/ont/ioos/parameter/wind_gust_from_direction";
    String units "degrees";
  }
  wind_speed {
    UInt32 _ChunkSizes 124195, 1;
    Float64 _FillValue -9999.0;
    Float64 actual_range 0.25722, 49.129;
    String id "1014461";
    String ioos_category "Wind";
    String long_name "Wind Speed";
    Float64 missing_value -9999.0;
    String platform "station";
    String standard_name "wind_speed";
    String standard_name_url "http://mmisw.org/ont/cf/parameter/wind_speed";
    String units "m.s-1";
  }
  wind_from_direction {
    UInt32 _ChunkSizes 124195, 1;
    Float64 _FillValue -9999.0;
    Float64 actual_range 0.0, 359.9;
    String id "1014464";
    String ioos_category "Wind";
    String long_name "Wind From Direction";
    Float64 missing_value -9999.0;
    String platform "station";
    String standard_name "wind_from_direction";
    String standard_name_url "http://mmisw.org/ont/cf/parameter/wind_from_direction";
    String units "degrees";
  }
  station {
    String _Unsigned "false";
    String cf_role "timeseries_id";
    String ioos_category "Identifier";
    String ioos_code "urn:ioos:station:org.mxak:org_mxak_adak_whitealice";
    String long_name "Adak WhiteAlice";
    String short_name "org_mxak_adak_whitealice";
    String type "fixed";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "TimeSeries";
    String cdm_timeseries_variables "station,longitude,latitude";
    String contributor_email "information@aoos.org";
    String contributor_name "Alaska Ocean Observing System (AOOS)";
    String contributor_role "funder";
    String contributor_role_vocabulary "https://vocab.nerc.ac.uk/collection/G04/current/";
    String contributor_url "http://www.aoos.org/";
    String Conventions "IOOS-1.2, CF-1.6, ACDD-1.3";
    String creator_country "USA";
    String creator_email "tech-it@mxak.org";
    String creator_institution "Marine Exchange of Alaska (MXAK)";
    String creator_name "Marine Exchange of Alaska (MXAK)";
    String creator_sector "industry";
    String creator_type "institution";
    String creator_url "http://www.mxak.org/";
    String defaultDataQuery "wind_gust_from_direction,air_temperature,wind_speed_of_gust,z,wind_speed,time,relative_humidity,wind_from_direction,air_pressure,dew_point_temperature&time>=max(time)-3days";
    Float64 Easternmost_Easting -176.706084;
    String featureType "TimeSeries";
    Float64 geospatial_lat_max 51.871716;
    Float64 geospatial_lat_min 51.871716;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -176.706084;
    Float64 geospatial_lon_min -176.706084;
    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 Marine Exchange of Alaska (MXAK)
2026-06-11T12:49:58Z https://www.mxak.org/services/mda/weather/
2026-06-11T12:49:58Z http://erddap.aoos.org/erddap/tabledap/org_mxak_adak_whitealice.html";
    String id "org_mxak_adak_whitealice";
    String infoUrl "https://portal.aoos.org/#metadata/49392/station";
    String institution "Marine Exchange of Alaska (MXAK)";
    String keywords "CF:air_pressure, CF:air_temperature, CF:dew_point_temperature, CF:relative_humidity, CF:wind_from_direction, CF:wind_gust_from_direction, CF:wind_speed, CF:wind_speed_of_gust, GCMD:Earth Science > Atmosphere > Atmospheric Pressure > Atmospheric Pressure Measurements, GCMD:Earth Science > Atmosphere > Atmospheric Pressure > Sea Level Pressure, GCMD:Earth Science > Atmosphere > Atmospheric Pressure > Static Pressure, GCMD:Earth Science > Atmosphere > Atmospheric Temperature > Air Temperature, GCMD:Earth Science > Atmosphere > Atmospheric Temperature > Dew Point Temperature, GCMD:Earth Science > Atmosphere > Atmospheric Temperature > Surface Air Temperature, GCMD:Earth Science > Atmosphere > Atmospheric Water Vapor > Dew Point Temperature, GCMD:Earth Science > Atmosphere > Atmospheric Water Vapor > Humidity, GCMD:Earth Science > Atmosphere > Atmospheric Winds > Surface Winds";
    String keywords_vocabulary "GCMD:GCMD Science Keywords, CF:NetCDF COARDS Climate and Forecast Standard Names";
    String license "https://creativecommons.org/licenses/by/4.0/";
    String naming_authority "org.mxak";
    Float64 Northernmost_Northing 51.871716;
    String platform "fixed";
    String platform_name "Adak WhiteAlice";
    String platform_vocabulary "https://mmisw.org/ont/ioos/platform";
    String processing_level "No quality control tests have been applied";
    String publisher_country "USA";
    String publisher_email "tech-it@mxak.org";
    String publisher_institution "Marine Exchange of Alaska (MXAK)";
    String publisher_name "Marine Exchange of Alaska (MXAK)";
    String publisher_sector "industry";
    String publisher_type "institution";
    String publisher_url "http://www.mxak.org/";
    String references "https://www.mxak.org/services/mda/weather/,,https://github.com/ioos/ioos_qc";
    String sourceUrl "https://www.mxak.org/services/mda/weather/";
    Float64 Southernmost_Northing 51.871716;
    String standard_name_vocabulary "CF Standard Name Table v93";
    String summary "Timeseries data from 'Adak WhiteAlice' (org_mxak_adak_whitealice)";
    String time_coverage_end "2017-11-06T09:30:00Z";
    String time_coverage_start "2015-05-05T13:50:00Z";
    String title "Adak WhiteAlice";
    Float64 Westernmost_Easting -176.706084;
  }
}

 

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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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