ERDDAP > tabledap > Data Access Form

Dataset Title:	Ketchikan Thomas Basin
Institution:	Alaska Department of Environmental Conservation   (Dataset ID: ism-aoos-ketchikan-thomas-basin)
Information:	Summary | License | FGDC | ISO 19115 | Metadata | Background | Files | Make a graph

 

Variable	Optional Constraint #1		Optional Constraint #2		Minimum	Maximum
time (UTC)	!= =~ <= >= = < >		!= =~ <= >= = < >		2025-08-09T08:00:00Z	2025-10-14T16:00:00Z
latitude (degrees_north)	!= =~ <= >= = < >		!= =~ <= >= = < >		55.338816	55.338816
longitude (degrees_east)	!= =~ <= >= = < >		!= =~ <= >= = < >		-131.642427	-131.642427
z (Altitude, m)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	0.0
sea_water_electrical_conductivity (mS.cm-1)	!= =~ <= >= = < >		!= =~ <= >= = < >		15.8266328125	33.1868828125
mass_concentration_of_oxygen_in_sea_water (mg.L-1)	!= =~ <= >= = < >		!= =~ <= >= = < >		5.7877101898	9.6797208786
fractional_saturation_of_oxygen_in_sea_water (%)	!= =~ <= >= = < >		!= =~ <= >= = < >		66.1593780518	114.7461471558
sea_water_practical_salinity_cm_time__mean_over_p1d (1e-3)	!= =~ <= >= = < >		!= =~ <= >= = < >		12.4780550003	27.8412055969
sea_water_density (kg.m-3)	!= =~ <= >= = < >		!= =~ <= >= = < >		1009.1150999069	1020.9537744522
sea_water_temperature_cm_time__mean_over_p1d (degree_Celsius)	!= =~ <= >= = < >		!= =~ <= >= = < >		10.4573364258	17.3855075836
sea_water_ph_reported_on_total_scale (1)	!= =~ <= >= = < >		!= =~ <= >= = < >		7.8365654945	8.334022522
station (Ketchikan Thomas Basin)	!= =~ <= >= = < >		!= =~ <= >= = < >		""	""

 

Server-side Functions

distinct()

orderBy orderByDescending orderByClosest orderByCount orderByLimit orderByMax orderByMin orderByMinMax orderByMean orderBySum (" time latitude longitude z sea_water_electrical_conductivity mass_concentration_of_oxygen_in_sea_water fractional_saturation_of_oxygen_in_sea_water sea_water_practical_salinity_cm_time__mean_over_p1d sea_water_density sea_water_temperature_cm_time__mean_over_p1d sea_water_ph_reported_on_total_scale station time latitude longitude z sea_water_electrical_conductivity mass_concentration_of_oxygen_in_sea_water fractional_saturation_of_oxygen_in_sea_water sea_water_practical_salinity_cm_time__mean_over_p1d sea_water_density sea_water_temperature_cm_time__mean_over_p1d sea_water_ph_reported_on_total_scale station time latitude longitude z sea_water_electrical_conductivity mass_concentration_of_oxygen_in_sea_water fractional_saturation_of_oxygen_in_sea_water sea_water_practical_salinity_cm_time__mean_over_p1d sea_water_density sea_water_temperature_cm_time__mean_over_p1d sea_water_ph_reported_on_total_scale station time latitude longitude z sea_water_electrical_conductivity mass_concentration_of_oxygen_in_sea_water fractional_saturation_of_oxygen_in_sea_water sea_water_practical_salinity_cm_time__mean_over_p1d sea_water_density sea_water_temperature_cm_time__mean_over_p1d sea_water_ph_reported_on_total_scale station time latitude longitude z sea_water_electrical_conductivity mass_concentration_of_oxygen_in_sea_water fractional_saturation_of_oxygen_in_sea_water sea_water_practical_salinity_cm_time__mean_over_p1d sea_water_density sea_water_temperature_cm_time__mean_over_p1d sea_water_ph_reported_on_total_scale station ")

File type: (more information) .nc - Download a flat, table-like, NetCDF-3 binary file with COARDS/CF/ACDD metadata. .csv - Download a ISO-8859-1 comma-separated text table (line 1: names; line 2: units; ISO 8601 times). .dds - View the dataset's structure via an ISO-8859-1 OPeNDAP Dataset Descriptor Structure (DDS). .csv0 - Download a ISO-8859-1 .csv file without column names or units. Times are ISO 8601 strings. .smallPdf - View a small .pdf image file with a graph or map. .xhtml - View a UTF-8 XHTML (XML) file with the data in a table. 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). .nccsvMetadata - View the dataset's metadata as the top half of a 7-bit ASCII NCCSV .csv file. .odvTxt - Download longitude,latitude,time,otherColumns as an ISO-8859-1 ODV Generic Spreadsheet File (.txt). .ncCF - Download a NetCDF-3 CF Discrete Sampling Geometries file (Contiguous Ragged Array). .fgdc - View the dataset's UTF-8 FGDC .xml metadata. .itx - Download an ISO-8859-1 Igor Text File. Each response column becomes a wave. .asc - View OPeNDAP-style ISO-8859-1 comma-separated text. .ncCFMAHeader - View the UTF-8 header (the metadata) for the .ncCFMA file. .smallPng - View a small .png image file with a graph or map. .parquet - Download as a parquet file. Metadata contains column names ("column_names") and units ("column_units"). .ncCFMA - Download a NetCDF-3 CF Discrete Sampling Geometries file (Multidimensional Array). .mat - Download a MATLAB binary file. .json - View a table-like UTF-8 JSON file (missing value = 'null'; times are ISO 8601 strings). .wav - Download a .wav audio file. All columns must be numeric and of the same type. .kml - View a .kml file, suitable for Google Earth. .ncoJson - Download a UTF-8 NCO lvl=2 JSON file with COARDS/CF/ACDD metadata. .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). .tsvp - Download a ISO-8859-1 .tsv file with line 1: name (units). Times are ISO 8601 strings. .pdf - View a standard, medium-sized .pdf image file with a graph or map. .nccsv - Download a NetCDF-3-like 7-bit ASCII NCCSV .csv file with COARDS/CF/ACDD metadata. .htmlTable - View a UTF-8 .html web page with the data in a table. Times are ISO 8601 strings. .esriCsv - Download a ISO_8859_1 .csv file for ESRI's ArcGIS 9.x and below (separate date and time columns). .geoJson - Download longitude,latitude,otherColumns data as a UTF-8 GeoJSON .json file. .csvp - Download a ISO-8859-1 .csv file with line 1: name (units). Times are ISO 8601 strings. .transparentPng - View a .png image file (just the data, without axes, landmask, or legend). .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). .png - View a standard, medium-sized .png image file with a graph or map. .largePdf - View a large .pdf image file with a graph or map. .dods - OPeNDAP clients use this to download the data in the DODS binary format. .iso19115 - View the dataset's ISO 19115-2/19139 UTF-8 .xml metadata. .ncCFHeader - View the UTF-8 header (the metadata) for the .ncCF file. .ncHeader - View the UTF-8 header (the metadata) for the NetCDF-3 .nc file. .jsonlKVP - View a UTF-8 JSON Lines file with Key:Value pairs (missing value = 'null'; times are ISO 8601 strings). .croissant - Download the dataset croissant schema. .tsv0 - Download a ISO-8859-1 .tsv file without column names or units. Times are ISO 8601 strings. .largePng - View a large .png image file with a graph or map.

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  time {
    UInt32 _ChunkSizes 512;
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.7547264e+9, 1.7604576e+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 _FillValue NaN;
    Float64 actual_range 55.338816, 55.338816;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 _FillValue NaN;
    Float64 actual_range -131.642427, -131.642427;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  z {
    UInt32 _ChunkSizes 442;
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "up";
    Float64 _FillValue NaN;
    Float64 actual_range 0.0, 0.0;
    String axis "Z";
    String ioos_category "Location";
    String long_name "Altitude";
    String positive "up";
    String standard_name "altitude";
    String units "m";
  }
  sea_water_electrical_conductivity {
    UInt32 _ChunkSizes 512;
    Float64 _FillValue -9999.0;
    Float64 actual_range 15.8266328125, 33.1868828125;
    String id "1130952";
    String ioos_category "Other";
    String long_name "Conductivity";
    Float64 missing_value -9999.0;
    String platform "station";
    String short_name "sea_water_electrical_conductivity";
    String standard_name "sea_water_electrical_conductivity";
    String standard_name_url "http://mmisw.org/ont/cf/parameter/sea_water_electrical_conductivity";
    String units "mS.cm-1";
  }
  mass_concentration_of_oxygen_in_sea_water {
    UInt32 _ChunkSizes 512;
    Float64 _FillValue -9999.0;
    Float64 actual_range 5.7877101898, 9.6797208786;
    String id "1130953";
    String ioos_category "Other";
    String long_name "Dissolved Oxygen Concentration";
    Float64 missing_value -9999.0;
    String platform "station";
    String short_name "mass_concentration_of_oxygen_in_sea_water";
    String standard_name "mass_concentration_of_oxygen_in_sea_water";
    String standard_name_url "http://mmisw.org/ont/cf/parameter/mass_concentration_of_oxygen_in_sea_water";
    String units "mg.L-1";
  }
  fractional_saturation_of_oxygen_in_sea_water {
    UInt32 _ChunkSizes 512;
    Float64 _FillValue -9999.0;
    Float64 actual_range 66.1593780518, 114.7461471558;
    String id "1130954";
    String ioos_category "Other";
    String long_name "Oxygen Saturation";
    Float64 missing_value -9999.0;
    String platform "station";
    String short_name "fractional_saturation_of_oxygen_in_sea_water";
    String standard_name "fractional_saturation_of_oxygen_in_sea_water";
    String standard_name_url "http://mmisw.org/ont/cf/parameter/fractional_saturation_of_oxygen_in_sea_water";
    String units "%";
  }
  sea_water_practical_salinity_cm_time__mean_over_p1d {
    UInt32 _ChunkSizes 512;
    Float64 _FillValue -9999.0;
    Float64 actual_range 12.4780550003, 27.8412055969;
    String cell_methods "time: mean (interval: 24 hours)";
    String id "1130955";
    String ioos_category "Other";
    String long_name "Salinity";
    Float64 missing_value -9999.0;
    String platform "station";
    String short_name "sea_water_practical_salinity";
    String standard_name "sea_water_practical_salinity";
    String standard_name_url "http://mmisw.org/ont/cf/parameter/sea_water_practical_salinity";
    String units "1e-3";
  }
  sea_water_density {
    UInt32 _ChunkSizes 512;
    Float64 _FillValue -9999.0;
    Float64 actual_range 1009.1150999069, 1020.9537744522;
    String id "1130956";
    String ioos_category "Other";
    String long_name "Sea Water Density";
    Float64 missing_value -9999.0;
    String platform "station";
    String short_name "sea_water_density";
    String standard_name "sea_water_density";
    String standard_name_url "http://mmisw.org/ont/cf/parameter/sea_water_density";
    String units "kg.m-3";
  }
  sea_water_temperature_cm_time__mean_over_p1d {
    UInt32 _ChunkSizes 512;
    Float64 _FillValue -9999.0;
    Float64 actual_range 10.4573364258, 17.3855075836;
    String cell_methods "time: mean (interval: 24 hours)";
    String id "1130957";
    String ioos_category "Other";
    String long_name "Water Temperature";
    Float64 missing_value -9999.0;
    String platform "station";
    String short_name "sea_water_temperature";
    String standard_name "sea_water_temperature";
    String standard_name_url "http://mmisw.org/ont/cf/parameter/sea_water_temperature";
    String units "degree_Celsius";
  }
  sea_water_ph_reported_on_total_scale {
    UInt32 _ChunkSizes 512;
    Float64 _FillValue -9999.0;
    Float64 actual_range 7.8365654945, 8.334022522;
    String id "1130958";
    String ioos_category "Other";
    String long_name "pH";
    Float64 missing_value -9999.0;
    String platform "station";
    String short_name "sea_water_ph_reported_on_total_scale";
    String standard_name "sea_water_ph_reported_on_total_scale";
    String standard_name_url "http://mmisw.org/ont/cf/parameter/sea_water_ph_reported_on_total_scale";
    String units "1";
  }
  station {
    String cf_role "timeseries_id";
    String ioos_category "Identifier";
    String ioos_code "urn:ioos:station:com.axiomdatascience:137472";
    String long_name "Ketchikan Thomas Basin";
    String short_name "ism-aoos-ketchikan-thomas-basin";
    String type "fixed";
  }
 }
  NC_GLOBAL {
    String _NCProperties "version=2,netcdf=4.8.1,hdf5=1.12.2";
    String cdm_data_type "TimeSeries";
    String cdm_timeseries_variables "station,longitude,latitude";
    String contributor_email "feedback@axiomdatascience.com,feedback@axiomdatascience.com";
    String contributor_name "Axiom Data Science,Axiom Data Science";
    String contributor_role "contributor,processor";
    String contributor_role_vocabulary "NERC";
    String contributor_url "https://www.axiomdatascience.com,https://www.axiomdatascience.com";
    String Conventions "IOOS-1.2, CF-1.6, ACDD-1.3";
    String creator_country "USA";
    String creator_institution "Alaska Department of Environmental Conservation";
    String creator_name "Alaska Department of Environmental Conservation";
    String creator_sector "gov_state";
    String creator_type "institution";
    String creator_url "https://dec.alaska.gov/";
    String defaultDataQuery "sea_water_practical_salinity_cm_time__mean_over_p1d,sea_water_ph_reported_on_total_scale,sea_water_density,sea_water_electrical_conductivity,mass_concentration_of_oxygen_in_sea_water,z,fractional_saturation_of_oxygen_in_sea_water,time,sea_water_temperature_cm_time__mean_over_p1d&time>=max(time)-3days";
    Float64 Easternmost_Easting -131.642427;
    String featureType "TimeSeries";
    Float64 geospatial_lat_max 55.338816;
    Float64 geospatial_lat_min 55.338816;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -131.642427;
    Float64 geospatial_lon_min -131.642427;
    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 Alaska Ocean Observing System (AOOS) at https://erddap.aoos.org/erddap/tabledap/ketchikan-thomas-basin
2025-10-14T20:47:44Z https://erddap.aoos.org/erddap/tabledap/ketchikan-thomas-basin
2025-10-14T20:47:44Z http://erddap.sensors.axds.co/erddap/tabledap/ism-aoos-ketchikan-thomas-basin.html";
    String id "137472";
    String infoUrl "https://sensors.ioos.us/#metadata/137472/station";
    String institution "Alaska Department of Environmental Conservation";
    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 55.338816;
    String platform "fixed";
    String platform_name "Ketchikan Thomas Basin";
    String platform_vocabulary "http://mmisw.org/ont/ioos/platform";
    String processing_level "Level 2";
    String publisher_country "USA";
    String publisher_email "information@aoos.org";
    String publisher_institution "Alaska Ocean Observing System (AOOS)";
    String publisher_name "Alaska Ocean Observing System (AOOS)";
    String publisher_sector "ioos_ra";
    String publisher_type "institution";
    String publisher_url "http://www.aoos.org/";
    String references "https://erddap.aoos.org/erddap/tabledap/ketchikan-thomas-basin,https://erddap.aoos.org/erddap/tabledap/ketchikan-thomas-basin,";
    String sourceUrl "https://erddap.aoos.org/erddap/tabledap/ketchikan-thomas-basin";
    Float64 Southernmost_Northing 55.338816;
    String standard_name_vocabulary "CF Standard Name Table v72";
    String station_id "137472";
    String summary "Timeseries data from 'Ketchikan Thomas Basin' (ism-aoos-ketchikan-thomas-basin)";
    String time_coverage_end "2025-10-14T16:00:00Z";
    String time_coverage_start "2025-08-09T08:00:00Z";
    String title "Ketchikan Thomas Basin";
    Float64 Westernmost_Easting -131.642427;
  }
}

 

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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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