CKAN
The open-source catalogue that a large share of municipal open-data portals run on. Its API is why some portals can be counted dataset by dataset and others cannot.
How this list is decided. Membership is not a field an editor set: it is every published entry whose own text names CKAN, matched at build time, with the sentence printed under each row so you can judge the match yourself. 19 entries in 19 cities.
✔ Every published entry is checked against the public sources it cites before publication.
Where it appears in the atlas
Rebuilt on CKAN software (with custom extensions for federation to Spanish and EU portals), it is a pillar of the city's data-commons and transparency policy.
Run by the Land Berlin (Senate Chancellery), it is a CKAN-based metadata catalogue now backed by the city-state's E-Government Act, an Open Data Ordinance, and a 2023 Open Data Strategy.
Bogotá's district open-data portal, launched in 2017 and run by the cadastre agency UAECD through the IDECA spatial-data infrastructure, held 1,900 datasets from 60 publishing entities when its CKAN API was counted on 26 July 2026 — below the 2,200 the city claimed in 2023.
The CKAN portal that followed in April 2017 carries 232 datasets.
A CKAN catalogue query on 26 July 2026 returned 451 datasets and not one unlicensed: 386 under an Argentine port of Creative Commons Attribution 2.5, 60 under an unversioned CC BY, and 5 under the CC BY 4.0 that the city's own publication guide says it always applies.
Dublinked opened in November 2011 as Ireland's first regional open-data platform — Dublin City Council with Fingal, South Dublin and Dun Laoghaire-Rathdown county councils, curated by NUI Maynooth on a platform IBM Research supplied for the start-up phase — and was relaunched on CKAN in 2016 under Smart Dublin.
Goiânia runs a CKAN open-data portal at dadosabertos.goiania.go.gov.br carrying 29 datasets, every one published by the Prefeitura Municipal de Goiânia and every one under the same licence, Creative Commons Atribuição — a uniformity most municipal catalogues never manage.
A February 2026 redesign rebuilt it on the open-source CKAN platform with API access.
Data is released under the Creative Commons Attribution licence (CC BY 3.0 IT), with a CKAN-based API for programmatic access, and the catalogue is federated to the national dati.gov.it registry.
Montreal has published municipal open data since the early 2010s, today from a CKAN catalogue at donnees.montreal.ca.
Munich's CKAN-based open data portal has published city administration data since 2014 and now lists 337 searchable datasets.
It runs on the bodik.jp/CKAN platform shared with dozens of other Japanese local governments, under an open-data promotion policy the city adopted in 2019.
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The Métropole Nice Côte d'Azur runs a shared open-data portal on CKAN and Drupal, pooling data from the Métropole, the Ville de Nice, the tourism office, the transit operator Régie Ligne d'Azur and INSEE, and publishing everything under the Etalab Licence Ouverte.
Rio publishes its open data through data.rio, an Esri ArcGIS Hub site run by the Instituto Pereira Passos rather than a CKAN or Socrata catalogue.
Counted the same day from the CKAN API of the national portal datos.gob.cl: 3,149 datasets from 231 publishing organisations, of which 1,313 are Creative Commons Non-Commercial, 922 CC BY, 421 CC0, 352 ODC-PDDL, 52 ODC-BY, 50 ODbL and 23 explicitly unspecified.
The city's CKAN portal, run by the municipal comptroller's integrity unit, held 474 datasets on 26 July 2026, and 454 of them had been touched within the past year.
Toronto opened one of Canada's first municipal data portals in November 2009 and rebuilt it on CKAN in 2018; the catalogue held 554 datasets in July 2026, with records edited the same day.
Vilnius publishes municipal datasets — including public transport GTFS feeds — on one open CKAN portal, letting developers and residents build on official city data directly.
Yokohama runs its open-data catalogue on CKAN at data.city.yokohama.lg.jp.
Others in this group
The whole layer
Every standard, protocol and licence the atlas names, with the open-data licence ladder in one table: Standards & licences.