Publish your data on Données Québec¶

Once created, your catalog can be published on Données Québec using the CKAN Server module developed by Isogeo.

Prerequisites¶

In order for your data to be uploaded to Données Québec, it must meet several criteria:

• be in a catalog shared by the CKAN server and OpenCatalog ;
• contain at least one operational download link. Recognized download links are :
  • link to a WFS service capable of delivering the data in GeoJSON format in WGS84 (4326): see assign a WFS service ;
  • link to vector (GeoJSON, Shapefile Zipped and Geopackage), raster (ECW, JPEG2000 and GeoTIFF) or tabular (csv, xls and xlsx) data files: see assign download link.

List of completed metadata fields¶

Description¶

The description is formatted as follows:

Description : Summary

Collection context: Data collection context (if any)

Collection method: Data collection method (if any)

Attributes: array containing field name, type and alias (or basic comment).

List of fields automatically completed in the Quebec data sheet resources¶

When you edit a resource on Données Québec, you can add information about it (see screenshot).

Here is the list of resource fields that CKAN Isogeo automatically fills in:

Update frequency¶

The update frequency is entered according to this correspondence:

The "Real time", "Irregular" and "Archive" values must be filled in manually, as they have no equivalent in Isogeo.

Links to services, data downloads and interactive maps¶

Several types of links can be added to the Quebec Data sheet.

• service links:
  • link to a WMS (Web Map Service) visualization service ;
  • link to an EMS (Esri Map Service) visualization service ;
• download links:
  • link to a file uploaded to Isogeo (hosted) ;
  • link to vector (GeoJSON, Shapefile Zipped, Geopackage KML/GML, CSV), raster (GeoTIFF and JPEG2000) or tabular (csv and xlsx) data files as a "Data" type link with the download action ;
• link to a WFS service:
  • the number of entities must be less than the map server's threshold ( MaxRecordCount=1000 parameter by default for ArcGIS Server, maximum number of objects parameter for Geoserver, etc.)
  • the 4326 coordinate system must be available in all capacities
  • geojson export format too
• interactive map links: links to a "Data" or "Links" resource with the visualization action.

Generating and monitoring valid data sets¶

1. To generate a new harvesting link, go to Administration, Shares and click on New;
2. Then choose the CKAN application, a catalog and a Name for sharing;
3. Click on Create;
4. A link is automatically generated to launch the synchronization process and publish your data on Données Québec.

For your information, data sheets without a download link meeting the above requirements are considered invalid.

List of possible synchronization errors¶

Here is a list of possible errors when launching the synchronization:

• Unable to update dataset to CKAN: Unable to update a dataset (usually an authorization problem) in the CKAN portal;
• Unable to compute CKAN dataset: Unable to retrieve data from the CKAN portal;
• No defined target organization: The CKAN organization entered is not found in the CKAN portal;
• CKAN dataset is now orphan from Isogeo: A dataset is present on DOnnées Québec but no longer in the Isogeo catalog.