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Dataset Title:	Ocean Nutrient and Inorganic Carbon Dataset: Greenedge 2016
Institution:	??? (Dataset ID: Ocean_nutrients_Greenedge_2016_b08d_187f_75f3)
Range:	longitude = -63.98764 to -55.99096°E, latitude = 67.995 to 70.51318°N
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Subset \| Data Access Form \| Files

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  project_name {
    String ioos_category "Identifier";
    String long_name "Project Name";
  }
  platform_name {
    String ioos_category "Unknown";
    String long_name "Platform Name";
  }
  Cruise {
    String ioos_category "Unknown";
    String long_name "Cruise";
  }
  Station {
    String ioos_category "Identifier";
    String long_name "Station";
  }
  sample_date {
    Float64 actual_range 1.4654304e+9, 1.4681088e+9;
    String ioos_category "Time";
    String long_name "Sample Date";
    String source_name "sample_date";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String time_precision "1970-01-01T00:00:00Z";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range 67.995, 70.51318;
    String axis "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String ioos_category "Location";
    String long_name "Latitude";
    String source_name "latitude_north_dd";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range -63.98764, -55.99096;
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String ioos_category "Location";
    String long_name "Longitude";
    String source_name "longitude_dd";
    String standard_name "longitude";
    String units "degrees_east";
  }
  Longitude_east {
    Float64 actual_range 296.01236, 304.00904;
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  Cast {
    Int16 actual_range 3, 201;
    String ioos_category "Unknown";
    String long_name "Cast";
  }
  Bottle {
    Byte actual_range 1, 24;
    String ioos_category "Unknown";
    String long_name "Bottle";
  }
  Bottom_Depth_m {
    Int16 actual_range 127, 2216;
    String ioos_category "Location";
    String long_name "Bottom Depth M";
  }
  sample_depth_m {
    Float32 actual_range 0.6, 2050.9;
    String ioos_category "Location";
    String long_name "Sample Depth M";
  }
  NO2_um_l {
    Float32 actual_range 0.0, 0.69;
    Float64 colorBarMaximum 1.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Dissolved Nutrients";
    String long_name "Mole Concentration Of Nitrite In Sea Water";
    String standard_name "mole_concentration_of_nitrite_in_sea_water";
  }
  NO2_result_value_qualifier {
    String ioos_category "Dissolved Nutrients";
    String long_name "NO2 Result Value Qualifier";
  }
  NO3_um_l {
    Float32 actual_range 0.0, 28.48;
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Dissolved Nutrients";
    String long_name "Mole Concentration Of Nitrate In Sea Water";
    String standard_name "mole_concentration_of_nitrate_in_sea_water";
  }
  NO3_result_value_qualifier {
    String ioos_category "Dissolved Nutrients";
    String long_name "NO3 Result Value Qualifier";
  }
  SiOx_um_l {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 131.44;
    String ioos_category "Dissolved Nutrients";
    String long_name "Si Ox Um L";
  }
  SiOx_result_value_qualifier {
    String ioos_category "Dissolved Nutrients";
    String long_name "Si Ox Result Value Qualifier";
  }
  PO4_Filt_um_l {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0, 2.19;
    String ioos_category "Dissolved Nutrients";
    String long_name "Mass Concentration Of Phosphate In Sea Water";
    String standard_name "mass_concentration_of_phosphate_in_sea_water";
  }
  PO4_Filt_result_value_qualifier {
    String ioos_category "Dissolved Nutrients";
    String long_name "PO4 Filt Result Value Qualifier";
  }
  NH4_um_l {
    Float32 _FillValue NaN;
    Float32 actual_range -0.03, 1.14;
    Float64 colorBarMaximum 5.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Dissolved Nutrients";
    String long_name "Mole Concentration Of Ammonium In Sea Water";
    String standard_name "mole_concentration_of_ammonium_in_sea_water";
  }
  NH4_result_value_qualifier {
    String ioos_category "Dissolved Nutrients";
    String long_name "NH4 Result Value Qualifier";
  }
  DissInorgN_um_l {
    Float32 actual_range 0.0, 28.49;
    String ioos_category "Statistics";
    String long_name "Diss Inorg N Um L";
  }
  DissInorgN_result_value_qualifier {
    String ioos_category "Statistics";
    String long_name "Diss Inorg N Result Value Qualifier";
  }
  Type {
    String ioos_category "Unknown";
    String long_name "Type";
  }
  a_18O_Per_mille {
    Float32 _FillValue NaN;
    Float32 actual_range -2.55, 0.42;
    String ioos_category "Unknown";
    String long_name "18 O Per Mille";
  }
  a_18O_result_value_qualifier {
    String ioos_category "Unknown";
    String long_name "18 O Result Value Qualifier";
  }
  DIC_um_l {
    Float64 _FillValue NaN;
    Float64 actual_range 1033.456781, 2279.202407;
    String ioos_category "Unknown";
    String long_name "DIC Um L";
  }
  DIC_result_value_qualifier {
    String ioos_category "Unknown";
    String long_name "DIC Result Value Qualifier";
  }
  TotAlk_l_um_l {
    Float64 _FillValue NaN;
    Float64 actual_range 2176.049081, 2315.238146;
    String ioos_category "Unknown";
    String long_name "Tot Alk/l Um L";
  }
  TotAlk_l_result_value_qualifier {
    String ioos_category "Unknown";
    String long_name "Tot Alk/l Result Value Qualifier";
  }
  SalinomSal_psu {
    Float64 _FillValue NaN;
    Float64 actual_range 31.74609005, 34.66143506;
    String ioos_category "Salinity";
    String long_name "Salinom Sal Psu";
  }
  SalinomSal_result_value_qualifier {
    String ioos_category "Unknown";
    String long_name "Salinom Sal Result Value Qualifier";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Other";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    Float64 Easternmost_Easting -55.99096;
    Float64 geospatial_lat_max 70.51318;
    Float64 geospatial_lat_min 67.995;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -55.99096;
    Float64 geospatial_lon_min -63.98764;
    String geospatial_lon_units "degrees_east";
    String history 
"2024-04-29T00:29:56Z (local files)
2024-04-29T00:29:56Z http://CanWINerddap.ad.umanitoba.ca/tabledap/Ocean_nutrients_Greenedge_2016_b08d_187f_75f3.das";
    String infoUrl "???";
    String institution "???";
    String keywords "a_18O_Per_mille, a_18O_result_value_qualifier, alk, alk/l, altimetry, ammonia, ammonium, bottle, bottom, Bottom_Depth_m, cast, chemistry, concentration, cruise, data, date, depth, dic, DIC_result_value_qualifier, DIC_um_l, diss, DissInorgN_result_value_qualifier, DissInorgN_um_l, dissolved, dissolved nutrients, earth, Earth Science > Oceans > Ocean Chemistry > Ammonia, Earth Science > Oceans > Ocean Chemistry > Nitrate, Earth Science > Oceans > Ocean Chemistry > Phosphate, filt, identifier, inorg, laboratory, latitude, local, longitude, Longitude_east_dd, mass, mass_concentration_of_phosphate_in_sea_water, mille, mole, mole_concentration_of_ammonium_in_sea_water, mole_concentration_of_nitrate_in_sea_water, mole_concentration_of_nitrite_in_sea_water, n02, name, nh4, NH4_result_value_qualifier, NH4_um_l, nitrate, nitrite, no2, NO2_result_value_qualifier, NO2_um_l, no3, NO3_result_value_qualifier, NO3_um_l, nutrients, ocean, oceans, per, phosphate, platform, platform_name, po4, PO4_Filt_result_value_qualifier, PO4_Filt_um_l, practical, project, project_name, psu, qualifier, result, sal, salinity, salinom, SalinomSal_psu, SalinomSal_result_value_qualifier, sample, sample_depth_m, satellite, science, sea, seawater, SiOx_result_value_qualifier, SiOx_um_l, source, station, statistics, time, tot, TotAlk_l_result_value_qualifier, TotAlk_l_um_l, type, unit, value, 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, 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.";
    Float64 Northernmost_Northing 70.51318;
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 67.995;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String subsetVariables "project_name, platform_name, Cruise, NO2_result_value_qualifier, NO3_result_value_qualifier, DissInorgN_result_value_qualifier, Type";
    String summary "Data from a local source.";
    String title "Ocean Nutrient and Inorganic Carbon Dataset: Greenedge 2016";
    Float64 Westernmost_Easting -63.98764;
  }
}

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 (external link)

Data Access Protocol (DAP) (external link)

and its selection constraints (external link)

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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