ERDDAP > tabledap > Data Access Form

Dataset Title:	Wisconsin Point Buoy 45217 from the Lake Superior NERR
Institution:	University of Wisconsin Extension   (Dataset ID: obs_579_latest)
Information:	Summary | License | FGDC | ISO 19115 | Metadata | Background | Files | Make a graph

 

Variable	Optional Constraint #1		Optional Constraint #2		Minimum	Maximum
time (UTC)	!= =~ <= >= = < >		!= =~ <= >= = < >		2026-04-23T18:45:00Z	2026-04-25T17:15:00Z
longitude (degrees_east)	!= =~ <= >= = < >		!= =~ <= >= = < >		-91.99959	-91.99959
latitude (degrees_north)	!= =~ <= >= = < >		!= =~ <= >= = < >		46.70758	46.70758
chlorophyll_fluorescence (RFU)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.4	2.25
fractional_saturation_of_oxygen_in_sea_water (1)	!= =~ <= >= = < >		!= =~ <= >= = < >		98.58	104.29
mass_concentration_of_oxygen_in_sea_water (kg m-3)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.013	0.014
phycocyanin_fluorescence (RFU)	!= =~ <= >= = < >		!= =~ <= >= = < >
sea_surface_temperature (K)	!= =~ <= >= = < >		!= =~ <= >= = < >		274.8	276.63
sea_water_electrical_conductivity (Unknown)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.010123	0.011531
sea_water_ph_reported_on_total_scale (1)	!= =~ <= >= = < >		!= =~ <= >= = < >		7.77	7.91
sea_water_practical_salinity (1)	!= =~ <= >= = < >		!= =~ <= >= = < >
sea_water_turbidity (Turbidity, 1)	!= =~ <= >= = < >		!= =~ <= >= = < >		-9999.0	99.66
surface_downwelling_photosynthetic_photon_flux_in_air (mol m-2 s-1)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	0.00179216
platform	!= =~ <= >= = < >		!= =~ <= >= = < >

 

Server-side Functions

distinct()

orderBy orderByDescending orderByClosest orderByCount orderByLimit orderByMax orderByMin orderByMinMax orderByMean orderBySum (" time longitude latitude chlorophyll_fluorescence fractional_saturation_of_oxygen_in_sea_water mass_concentration_of_oxygen_in_sea_water phycocyanin_fluorescence sea_surface_temperature sea_water_electrical_conductivity sea_water_ph_reported_on_total_scale sea_water_practical_salinity sea_water_turbidity surface_downwelling_photosynthetic_photon_flux_in_air platform time longitude latitude chlorophyll_fluorescence fractional_saturation_of_oxygen_in_sea_water mass_concentration_of_oxygen_in_sea_water phycocyanin_fluorescence sea_surface_temperature sea_water_electrical_conductivity sea_water_ph_reported_on_total_scale sea_water_practical_salinity sea_water_turbidity surface_downwelling_photosynthetic_photon_flux_in_air platform time longitude latitude chlorophyll_fluorescence fractional_saturation_of_oxygen_in_sea_water mass_concentration_of_oxygen_in_sea_water phycocyanin_fluorescence sea_surface_temperature sea_water_electrical_conductivity sea_water_ph_reported_on_total_scale sea_water_practical_salinity sea_water_turbidity surface_downwelling_photosynthetic_photon_flux_in_air platform time longitude latitude chlorophyll_fluorescence fractional_saturation_of_oxygen_in_sea_water mass_concentration_of_oxygen_in_sea_water phycocyanin_fluorescence sea_surface_temperature sea_water_electrical_conductivity sea_water_ph_reported_on_total_scale sea_water_practical_salinity sea_water_turbidity surface_downwelling_photosynthetic_photon_flux_in_air platform time longitude latitude chlorophyll_fluorescence fractional_saturation_of_oxygen_in_sea_water mass_concentration_of_oxygen_in_sea_water phycocyanin_fluorescence sea_surface_temperature sea_water_electrical_conductivity sea_water_ph_reported_on_total_scale sea_water_practical_salinity sea_water_turbidity surface_downwelling_photosynthetic_photon_flux_in_air platform ")

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 512;
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.7769699e+9, 1.7771373e+9;
    String axis "T";
    String calendar "gregorian";
    String gts_ingest "true";
    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";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 _FillValue -9999.0;
    Float64 actual_range -91.99959, -91.99959;
    String axis "X";
    String comment "Longitude given by data provider for this platform dataset";
    String gts_ingest "true";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
    Float64 valid_max 180.0;
    Float64 valid_min -180.0;
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 _FillValue -9999.0;
    Float64 actual_range 46.70758, 46.70758;
    String axis "Y";
    String comment "Latitude given by data provider for this platform dataset";
    String gts_ingest "true";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
    Float64 valid_max 90.0;
    Float64 valid_min -90.0;
  }
  chlorophyll_fluorescence {
    UInt32 _ChunkSizes 1, 1;
    Float64 _FillValue -999.0;
    Float64 actual_range 0.4, 2.25;
    String axis "T";
    String comment "Chlorophyll is the green pigment in plants and algae. Chlorophyll measurements are used to determine how much algae is in the water. (USGS)";
    String coordinates "time latitude longitude depth";
    String coverage_content_type "physicalMeasurement";
    String gts_ingest "true";
    String instrument "instrument0";
    String ioos_category "Unknown";
    String long_name "chlorophyll_fluorescence";
    Float64 missing_value -999.0;
    String platform "platform";
    String units "RFU";
  }
  fractional_saturation_of_oxygen_in_sea_water {
    UInt32 _ChunkSizes 1, 1;
    Float64 _FillValue -999.0;
    Float64 actual_range 98.58, 104.29;
    String axis "T";
    String comment "Dissolved oxygen (DO) saturation is DO concentration relative to DO saturation levels at the same temperature and salinity in a water sample. (IOOS)";
    String coordinates "time latitude longitude depth";
    String coverage_content_type "physicalMeasurement";
    String gts_ingest "true";
    String instrument "instrument0";
    String ioos_category "Dissolved O2";
    String long_name "Dissolved oxygen saturation";
    Float64 missing_value -999.0;
    String platform "platform";
    String standard_name "fractional_saturation_of_oxygen_in_sea_water";
    String units "1";
  }
  mass_concentration_of_oxygen_in_sea_water {
    UInt32 _ChunkSizes 1, 1;
    Float64 _FillValue -999.0;
    Float64 actual_range 0.013, 0.014;
    String axis "T";
    String comment "Dissolved oxygen (DO) refers to the concentration of oxygen gas incorporated in water. (EPA)";
    String coordinates "time latitude longitude depth";
    String coverage_content_type "physicalMeasurement";
    String gts_ingest "true";
    String instrument "instrument0";
    String ioos_category "Dissolved O2";
    String long_name "Dissolved oxygen";
    Float64 missing_value -999.0;
    String platform "platform";
    String standard_name "mass_concentration_of_oxygen_in_sea_water";
    String units "kg m-3";
  }
  phycocyanin_fluorescence {
    String gts_ingest "true";
    String ioos_category "Unknown";
    String long_name "phycocyanin_fluorescence";
    String platform "platform";
    String units "RFU";
  }
  sea_surface_temperature {
    UInt32 _ChunkSizes 1, 1;
    Float64 _FillValue -999.0;
    Float64 actual_range 274.8, 276.63;
    String axis "T";
    String comment "Water temp is the in-situ temperature of the ocean [or lake]. (IOOS)";
    String coordinates "time latitude longitude depth";
    String coverage_content_type "physicalMeasurement";
    String gts_ingest "true";
    String instrument "instrument0";
    String ioos_category "Temperature";
    String long_name "Water temp at depth";
    Float64 missing_value -999.0;
    String platform "platform";
    String standard_name "sea_water_temperature";
    String units "K";
  }
  sea_water_electrical_conductivity {
    UInt32 _ChunkSizes 1, 1;
    Float64 _FillValue -999.0;
    Float64 actual_range 0.010123, 0.011531;
    String axis "T";
    String comment "Conductivity is the ability of a material to pass an electrical current. Conductivity can be corrected to a reference temperature. When this reference temperature is 25 degrees Celsius it is often referred to as 'specific conductivity'.";
    String coordinates "time latitude longitude depth";
    String coverage_content_type "physicalMeasurement";
    String gts_ingest "true";
    String instrument "instrument0";
    String ioos_category "Unknown";
    String long_name "Specific Conductivity";
    Float64 missing_value -999.0;
    String platform "platform";
    String standard_name "sea_water_electrical_conductivity_at_reference_temperature";
    String units "Unknown";
  }
  sea_water_ph_reported_on_total_scale {
    UInt32 _ChunkSizes 1, 1;
    Float64 _FillValue -999.0;
    Float64 actual_range 7.77, 7.91;
    String axis "T";
    String comment "pH is a measure of the acidity or alkalinity of the seawater. (NOAA)";
    String coordinates "time latitude longitude depth";
    String coverage_content_type "physicalMeasurement";
    String gts_ingest "true";
    String instrument "instrument0";
    String ioos_category "Unknown";
    String long_name "pH";
    Float64 missing_value -999.0;
    String platform "platform";
    String standard_name "sea_water_ph_reported_on_total_scale";
    String units "1";
  }
  sea_water_practical_salinity {
    String gts_ingest "true";
    String ioos_category "Salinity";
    String platform "platform";
    String standard_name "sea_water_practical_salinity";
    String units "1";
  }
  sea_water_turbidity {
    UInt32 _ChunkSizes 1, 1;
    Float64 _FillValue -999.0;
    Float64 actual_range -9999.0, 99.66;
    String axis "T";
    String comment "Turbidity is a measure of light scattering due to suspended material in water. It is a measure of the cloudiness of water. (IOOS)";
    String coordinates "time latitude longitude depth";
    String coverage_content_type "physicalMeasurement";
    String gts_ingest "true";
    String instrument "instrument0";
    String ioos_category "Total Suspended Matter";
    String long_name "Turbidity";
    Float64 missing_value -999.0;
    String platform "platform";
    String standard_name "sea_water_turbidity";
    String units "1";
  }
  surface_downwelling_photosynthetic_photon_flux_in_air {
    UInt32 _ChunkSizes 1, 1;
    Float64 _FillValue -999.0;
    Float64 actual_range 0.0, 0.00179216;
    String axis "T";
    String comment "Photosynthetically available radiation, or PAR, is the integrated downwelling irradiance for wavelengths from 400 to 700nm. It is the energy from the visible portion of sunlight that is available for photosynthesis [n water]. (IOOS)";
    String coordinates "time latitude longitude depth";
    String coverage_content_type "physicalMeasurement";
    String gts_ingest "true";
    String instrument "instrument0";
    String ioos_category "Meteorology";
    String long_name "Photosynthetically available radiation in air";
    Float64 missing_value -999.0;
    String platform "platform";
    String standard_name "surface_downwelling_photosynthetic_photon_flux_in_air";
    String units "mol m-2 s-1";
  }
  platform {
    String _Unsigned "false";
    String cf_role "timeseries_id";
    String ioos_category "Unknown";
  }
 }
  NC_GLOBAL {
    String _NCProperties "version=2,netcdf=4.9.3,hdf5=1.14.6";
    String acknowledgement "Thanks to Mathew Biddle, Tim Boyer, and the NCEI NetCDF working group for guidance";
    String cdm_data_type "TimeSeries";
    String cdm_timeseries_variables "platform,longitude,latitude";
    String comment "These data were automatically archived by GLOS' Seagull Platform. Contact GLOS with questions or concerns.";
    String contributor_name "University of Wisconsin Extension";
    String contributor_role "Ocean Observing System Contributor";
    String Conventions "COARDS,CF-1.7,IOOS-1.2,ACDD-1.3";
    String creator_country "USA";
    String creator_email "hannah.ramage@wisc.edu";
    String creator_institution "University of Wisconsin Extension";
    String creator_name "University of Wisconsin Extension";
    String creator_sector "academic";
    String creator_type "institution";
    String creator_url "https://lakesuperiornerr.org/";
    String date_created "2026-04-25T17:32:45.074919Z";
    String date_issued "2026-04-25T17:32:45.074952Z";
    String date_metadata_modified "2026-04-25T17:32:45.074948Z";
    String date_modified "2026-04-25T17:32:45.074943Z";
    Float64 Easternmost_Easting -91.99959;
    String featureType "TimeSeries";
    String geospatial_bounds "POINT (-91.999590 46.707580)";
    String geospatial_bounds_crs "EPSG:4326";
    String geospatial_bounds_vertical_crs "EPSG:5829";
    Float64 geospatial_lat_max 46.70758;
    Float64 geospatial_lat_min 46.70758;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -91.99959;
    Float64 geospatial_lon_min -91.99959;
    String geospatial_lon_units "degrees_east";
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String gts_ingest "true";
    String history 
"These data were automatically archived by GLOS' Seagull Platform. Corrections to data may periodically occur. Contact GLOS with questions or concerns.
2026-04-25T18:13:53Z (local database)
2026-04-25T18:13:53Z https://seagull-erddap.glos.org/erddap/tabledap/obs_579_latest.html";
    String id "obs_579_latest";
    String infoUrl "https://lakesuperiornerr.org/";
    String institution "University of Wisconsin Extension";
    String instrument_vocabulary "Uniform Resource Name (URN)";
    String keywords "air, at, available, Chlorophyll, chlorophyll, concentration, Conductivity, conductivity, depth, Dissolved, downwelling, electrical, fluorescence, flux, fractional, in, mass, of, on, oxygen, pH, ph, photon, photosynthetic, Photosynthetically, Phycocyanin, phycocyanin, practical, radiation, reference, reported, Salinity, salinity, saturation, scale, sea, Specific, surface, temp, temperature, total, Turbidity, turbidity, Water, water";
    String keywords_vocabulary "GCMD Science Keywords";
    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, GLOS, 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 metadata_link "https://www.ncei.noaa.gov/data/oceans/ncei/formats/netcdf/v2.0/";
    String naming_authority "org.glos";
    String ncei_template_version "NCEI_NetCDF_TimeSeries_Orthogonal_Template_v2.0";
    Float64 Northernmost_Northing 46.70758;
    String platform "moored_buoy";
    String platform_name "Wisconsin Point buoy";
    String platform_type "moored_buoy";
    String platform_vocabulary "http://mmisw.org/ont/ioos/platform";
    String processing_level "Not Applicable";
    String product_version "v1";
    String program "NCEI-IOOS-GLOS Data Pipeline";
    String project "NCEI-IOOS-GLOS Data Pipeline";
    String publisher_country "United States";
    String publisher_email "info@glos.org";
    String publisher_institution "GLOS";
    String publisher_name "GLOS Cyberinfrastructure Engineer";
    String publisher_type "position";
    String publisher_url "https://glos.org";
    String references "https://www.ncei.noaa.gov/data/oceans/ncei/formats/netcdf/v2.0/";
    String sea_name "Great Lakes";
    String source "GLOS Seagull";
    String sourceUrl "(local database)";
    Float64 Southernmost_Northing 46.70758;
    String standard_name_vocabulary "CF Standard Name Table v77";
    String summary "45217, or LKSWIWQ, is a water quality monitoring buoy located in nearshore Lake Superior near Wisconsin Point, within the Lake Superior National Estuarine Research Reserve. It was initially deployed in 2024 and is typically deployed May through October. This station was established with support from the Bipartisan Infrastructure Law.";
    String time_coverage_duration "PT1M";
    String time_coverage_end "2026-04-25T17:15:00Z";
    String time_coverage_resolution "PT900S";
    String time_coverage_start "2026-04-23T18:45:00Z";
    String title "Wisconsin Point Buoy 45217 from the Lake Superior NERR";
    String uuid "TBD";
    Float64 Westernmost_Easting -91.99959;
    String wmo_platform_code "45217";
  }
}

 

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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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