Data Access Form

Dataset Title:	Daily Freshwater Runoffs of the St. Lawrence at the Height of Quebec City \| Débits quotidiens d'eau douce du Saint-Laurent à hauteur de la ville de Québec
Institution:	Fisheries and Oceans Canada (Dataset ID: mpoDebitsEauQuotidiens)
Information:	Summary \| License \| Metadata \| Background \| Files \| Make a graph

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Variable	Minimum	Maximum
time (Date, UTC)	1968-01-01	2024-05-04

runoff (freshwater_runoffs, m^3/s)	6625.22	26531.5

Server-side Functions

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range -6.31584e+7, 1.7147808e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "Date";
    String source_name "date";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String time_precision "1970-01-01";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  runoff {
    Float32 actual_range 6625.22, 26531.5;
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String long_name "freshwater_runoffs";
    String units "m^3/s";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Other";
    String Conventions "COARDS, CF-1.10, ACDD-1.3";
    String creator_name "Denis Lefaivre";
    String creator_type "institution";
    String history 
"2024-11-21T20:02:45Z (local files)
2024-11-21T20:02:45Z https://erddap.ogsl.ca/erddap/tabledap/mpoDebitsEauQuotidiens.html";
    String infoUrl "https://catalogue.ogsl.ca/fr/dataset/ca-cioos_27913e4c-975c-4cab-9fc7-5ff556d82e68/";
    String institution "Fisheries and Oceans Canada";
    String institution_fr "Pêches et Océans Canada";
    String institution_identifier "https://ror.org/02qa1x782";
    String keywords "freshwater, runoffs";
    String keywords_fr "débits, eau douce";
    String license "Open Government Licence - Canada";
    String licenseUrl "https://open.canada.ca/en/open-government-licence-canada";
    String related_datasets "https://erddap.ogsl.ca/erddap/tabledap/mpoDebitsEauMensuels.html";
    String sourceUrl "(local files)";
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary "This dataset presents the daily mean runoff estimated using a One-Dimensional model forced by the flows from the basins of the Great Lakes, the Ottawa River and the lateral rivers to the St. Lawrence River, and finally by the observed water level at Saint-Joseph-de-la-Rive using the Lefaivre, D'Astous and Matte (2016) method. The mean uncertainty is 1000 m3/s.";
    String summary_fr "Ce jeu de données présente les débits quotidiens d'eau douce calculés à l'aide d'un modèle unidimensionnel qui utilise les débits du bassin des Grands Lacs, de l'Outaouais et des rivières tributaires au fleuve Saint-Laurent ainsi que les niveaux d'eau observés à Saint-Joseph-de-la-Rive selon la méthode de Lefaivre, D'Astous et Matte (2016). L'incertitude moyenne est de 1000 m3/s.";
    String time_coverage_end "2024-05-04";
    String time_coverage_start "1968-01-01";
    String title "Daily Freshwater Runoffs of the St. Lawrence at the Height of Quebec City | Débits quotidiens d'eau douce du Saint-Laurent à hauteur de la ville de Québec";
  }
}

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.