ERDDAP > tabledap > Make A Graph ?

Dataset Title:  CTD - Saguenay Fjord and Estuary of St. Lawrence - NSERC-Hypoxia | CTD - Fjord
du Saguenay et estuaire du St-Laurent - CRSNG-Hypoxie Subscribe RSS
Institution:  Institut des sciences de la mer de Rimouski   (Dataset ID: uqarIsmerCtdHypoxie)
Range: longitude = -70.8598 to -65.9967°E, latitude = 47.9167 to 49.6191°N, time = 2021-08-25T11:47:51Z to 2021-08-30T18:50:17Z
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Subset | Data Access Form | Files
 
Graph Type:  ?
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Constraints ? Optional
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Server-side Functions ?
 distinct() ?
? ("Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.")
 
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Things You Can Do With Your Graphs

Well, you can do anything you want with your graphs, of course. But some things you might not have considered are:

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.629892071e+9, 1.630349417e+9;
    String axis "T";
    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";
    Float32 actual_range 47.9167, 49.6191;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range -70.8598, -65.9967;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  stationID {
    String long_name "Station Identifier";
    String units "unitless";
  }
  PRES {
    String _CoordinateAxisType "Height";
    Float32 actual_range 2.0, 334.0;
    String axis "Z";
    String long_name "pressure";
    String standard_name "sea_water_pressure";
    String units "dbar";
  }
  TE90 {
    Float32 _FillValue NaN;
    Float32 actual_range 0.849, 19.293;
    String long_name "temperature";
    String standard_name "sea_water_temperature";
    String units "degree_C";
  }
  PSAL {
    Float32 _FillValue NaN;
    Float32 actual_range 6.5, 34.83;
    String long_name "practical salinity";
    String standard_name "sea_water_practical_salinity";
    String units "PSU";
  }
  OXYM {
    Float32 _FillValue NaN;
    Float32 actual_range 34.146, 339.279;
    String long_name "dissolved oxygen";
    String standard_name "mole_concentration_of_dissolved_molecular_oxygen_in_sea_water";
    String units "µM";
  }
  SVEL {
    Float32 _FillValue NaN;
    Float32 actual_range 1449.632, 1501.78;
    String long_name "Sound Velocity";
    String standard_name "speed_of_sound_in_sea_water";
    String units "m s-1";
  }
  SIGM {
    Float32 _FillValue NaN;
    Float32 actual_range 3.31, 28.861;
    String long_name "density";
    String standard_name "sea_water_density";
    String units "kg m-3";
  }
  SPVA {
    Float32 _FillValue NaN;
    Float32 actual_range 77.764, 2404.778;
    String long_name "Specific Volume Anomaly";
    String units "m3/kg";
  }
  VAIS {
    Float32 _FillValue NaN;
    Float32 actual_range -2.11e-4, 0.0346;
    String long_name "Brunt-Vaisala Frequency N2";
    String units "s-2";
  }
  SIGT {
    Float32 _FillValue NaN;
    Float32 actual_range 3.301, 27.336;
    String long_name "sigma-T";
    String standard_name "sea_water_sigma_t";
    String units "kg m-3";
  }
  POTM {
    Float32 _FillValue NaN;
    Float32 actual_range 0.848, 19.297;
    String long_name "potential temperature";
    String standard_name "sea_water_potential_temperature";
    String units "degree_C";
  }
  SIGP {
    Float32 _FillValue NaN;
    Float32 actual_range 3.301, 27.34;
    String long_name "Sigma-Theta";
    String standard_name "sea_water_sigma_theta";
    String units "kg m-3";
  }
  FRET {
    Float32 _FillValue NaN;
    Float32 actual_range -2.16, -0.36;
    String long_name "freezing temperature";
    String standard_name "freezing_temperature_of_sea_water";
    String units "degree_C";
  }
  ASAL {
    Float32 _FillValue NaN;
    Float32 actual_range 6.531, 34.996;
    String long_name "absolute salinity";
    String standard_name "sea_water_absolute_salinity";
    String units "g kg-1";
  }
  CONT {
    Float32 _FillValue NaN;
    Float32 actual_range 0.862, 20.117;
    String long_name "conservative temperature";
    String standard_name "sea_water_conservative_temperature";
    String units "degree_C";
  }
  D_CT {
    Float32 _FillValue NaN;
    Float32 actual_range 3.313, 28.863;
    String long_name "TEOS-10 (s, t, p) density";
    String units "kg m-3";
  }
  D0CT {
    Float32 _FillValue NaN;
    Float32 actual_range 3.304, 27.342;
    String long_name "TEOS-10 (s, t, 0) density";
    String units "kg m-3";
  }
  recordID {
    String cf_role "profile_id";
    String long_name "Original filename";
    String units "unitless";
  }
 }
  NC_GLOBAL {
    String Cast_Number "029";
    String cdm_altitude_proxy "PRES";
    String cdm_data_type "Profile";
    String cdm_profile_variables "recordID, longitude, latitude, stationID";
    String contributor_name "Gwénaëlle Chaillou, Pascal Ludovic, Olivier Hérard, Alfonso Mucci, Yves Gélinas";
    String contributor_role "principal investigator, coauthor, coauthor, coauthor, coauthor";
    String Conventions "CF-1.10, COARDS, ACDD-1.3, NCCSV-1.2";
    String creator_name "UQAR-ISMER";
    String creator_type "institution";
    String Cruise_Name "2116_HYPOXIE_ST_Laurent";
    String Cruise_Number "2021016";
    String description "CTD data from the Saguenay Fjord and the St. Lawrence Estuary during the NSERC-Hypoxia2021 cruise";
    String DOI "https://doi.org/10.26071/ogsl-77037b6e-c1b8";
    Float64 Easternmost_Easting -65.9967;
    String featureType "Profile";
    Float64 geospatial_lat_max 49.6191;
    Float64 geospatial_lat_min 47.9167;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -65.9967;
    Float64 geospatial_lon_min -70.8598;
    String geospatial_lon_units "degrees_east";
    String history 
"2026-08-18T00:45:31Z (local files)
2026-08-18T00:45:31Z http://erddap.cioos.ca/tabledap/uqarIsmerCtdHypoxie.das";
    String infoUrl "https://www.ismer.ca/";
    String institution "Institut des sciences de la mer de Rimouski";
    String keywords "conductivity, CTD, density, depth, fluorescence, oxygen, pressure, salinity, temperature";
    String keywords_fr "CTD, conductivité, densité, fluorescence, oxygène, pression, profondeur, salinité, température";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "Creative Commons Attribution 4.0 International license CC-BY 4.0. Allows for open sharing and adaptation of the data provided that the original creator is attributed";
    String licenseUrl "https://creativecommons.org/licenses/by/4.0/";
    String Max_Depth_m "329.92";
    String Min_Depth_m "2.18";
    Float64 Northernmost_Northing 49.6191;
    String Original_Filename "CTD_2021016_029_1_DN.ODF";
    String platform "research vessel";
    String platform_vocabulary "https://vocab.nerc.ac.uk/collection/L06/current/";
    String publisher_identifier "https://ror.org/03wfagk22";
    String publisher_name "St. Lawrence Global Observatory";
    String publisher_name_fr "Observatoire global du Saint-Laurent";
    String Sounding_m "338.75";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 47.9167;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String subsetVariables "stationID";
    String summary "Données CTD du Fjord du Saguenay et de l'Estuaire du St-Laurent lors de la mission CRSNG-Hypoxie 2021";
    String time_coverage_end "2021-08-30T18:50:17Z";
    String time_coverage_start "2021-08-25T11:47:51Z";
    String title "CTD - Saguenay Fjord and Estuary of St. Lawrence - NSERC-Hypoxia | CTD - Fjord du Saguenay et estuaire du St-Laurent - CRSNG-Hypoxie";
    Float64 Westernmost_Easting -70.8598;
  }
}

 

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.

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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