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Dataset Title:  Mean Sea Ice Concentration in the Estuary and Gulf of St. Lawrence |
Concentration moyenne de glace de mer dans l'estuaire et le golfe du Saint-
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Institution:  Institut des sciences de la mer de Rimouski   (Dataset ID: ismerMeanIceConcentration)
Range: time = 2008-11-01 to 2025-05-11
Information:  Summary ? | License ? | Metadata | Background (external link) | Data Access Form | Files
 
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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 1.2254976e+9, 1.7469216e+9;
    String axis "T";
    String coverage_content_type "coordinate";
    String ioos_category "Time";
    String long_name "Time";
    String nerc_standard_name "Date";
    String nerc_standard_name_identifier "https://vocab.nerc.ac.uk/collection/P01/current/ADATAA01/";
    String standard_name "time";
    String standard_name_identifier "https://vocab.nerc.ac.uk/collection/P07/current/CFSN0115/";
    String time_origin "01-JAN-1970 00:00:00";
    String time_precision "1970-01-01";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  mean_ice_concentration {
    Float32 actual_range 0.0, 97.72901;
    String ioos_category "Ice Distribution";
    String long_name "Mean Sea Ice Concentration";
    String standard_name "sea_ice_area_fraction";
    String standard_name_identifier "https://vocab.nerc.ac.uk/collection/P07/current/CFSN0424/";
    String units "1e-2";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Other";
    String contributor_institution "(a) Université du Québec à Rimouski, (b) Université du Québec à Rimouski, (c) Service Hydrographique et Océanographique de la Marine, (d) Fisheries and Oceans Canada, (e) St. Lawrence Global Observatory";
    String contributor_name "(a) Dany Dumont, (b) Sébastien Dugas, (c) Eliott Bismuth, (d) Peter Galbraith, (e) Antoine Biehler";
    String contributor_role "(a) Metadata Custodian, Author, (b) Coauthor, Contributor, (c) Coauthor, Contributor, (d) Contributor, (e) Metadata Custodian, Contributor, Editor";
    String Conventions "COARDS, CF-1.12, ACDD-1.3, NCCSV-1.2";
    String creator_email "dany_dumont@uqar.ca";
    String creator_identifier "https://orcid.org/0000-0003-4107-1799";
    String creator_name "Dany Dumont";
    String creator_type "person";
    String data_source "Environment and Climate Change Canada - Environment and Climate Change Canada – Canadian Ice Service";
    String dataset_status "OnGoing";
    String defaultGraphQuery "&time>=max(time)-1year&.bgColor=0xffffffff";
    String DOI "A VERIFIER";
    String geospatial_lat_max "52.2";
    String geospatial_lat_min "42.8";
    String geospatial_lat_units "degrees_north";
    String geospatial_lon_max "-55.2";
    String geospatial_lon_min "-71.3";
    String geospatial_lon_units "degrees_east";
    String grid_mapping_epsg_code "EPSG:4326";
    String grid_mapping_epsg_code_url "https://epsg.io/4326";
    String grid_mapping_geographic_crs_name "WGS 84";
    String grid_mapping_inverse_flattening "298.2572236";
    String grid_mapping_name "latitude_longitude";
    String grid_mapping_prime_meridian_name "Greenwich";
    String grid_mapping_semi_major_axis "6378137";
    String history 
"2026-08-18T00:41:52Z (local files)
2026-08-18T00:41:52Z http://erddap.cioos.ca/tabledap/ismerMeanIceConcentration.das";
    String infoUrl "https://ogsl.ca/cartesglacesstlaurent/";
    String institution "Institut des sciences de la mer de Rimouski";
    String keywords "climate change, sea ice";
    String keywords_fr "glace de mer, changement climatique";
    String keywords_vocabulary "NASA Global Change Master Directory (GCMD) Science Keywords and homemade keywords";
    String license "Creative Commons Attribution 4.0 International licence (CC-BY 4.0)";
    String licenseUrl "https://creativecommons.org/licenses/by/4.0/";
    String marine_region "Gulf of St. Lawrence";
    String marine_region_identifier "http://marineregions.org/mrgid/4290";
    String publisher_email "info@ogsl.ca";
    String publisher_name "St. Lawrence Global Observatory";
    String publisher_name_fr "Observatoire global du Saint-Laurent";
    String publisherID "https://ror.org/03wfagk22";
    String sourceUrl "(local files)";
    String standard_name_nerc_vocabulary "The NERC Vocabulary Server (NVS)";
    String standard_name_vocabulary "CF Standard Name Table v86";
    String summary "This dataset contains values calculated using existing data produced by Environment and Climate Change Canada (ECCC). Sea ice concentration is the percentage value of the area covered by ice in relation to the total area of the Estuary and Gulf of St. Lawrence. This data is obtained from ice charts produced daily by the Canadian Ice Service for the Gulf of St. Lawrence.";
    String summary_fr "Ce jeu de données contient des valeurs calculées à partir de données existantes produites par Environnement et changement climatique Canada (ECCC). La concentration de glace de mer est la valeur en pourcentage de la superficie couverte par de la glace par rapport à la superficie totale de l’estuaire et du golfe du Saint-Laurent. Cette donnée est obtenue à partir des cartes de glace produites quotidiennement par le Service canadien des glaces pour la région du golfe du Saint-Laurent.";
    String time_coverage_end "2025-05-11";
    String time_coverage_start "2008-11-01";
    String title "Mean Sea Ice Concentration in the Estuary and Gulf of St. Lawrence | Concentration moyenne de glace de mer dans l'estuaire et le golfe du Saint-Laurent";
  }
}

 

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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