DECODE — Citizen-Owned Data Ecosystem
This overview was generated with AI from the public sources listed below and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.
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DECODE was an EU Horizon 2020 research project (2016–2019, ~€5M) coordinated by Barcelona's municipal IT institute (IMI), building open-source tools to let citizens control what personal data they share. Barcelona ran two pilots: a Digital Democracy and Data Commons module letting residents sign Decidim petitions anonymously while proving residency (Oct 2018–Apr 2019), and a citizen-sensing pilot where residents deployed noise/air sensors and set their own data-sharing terms. A small research pilot rather than a permanent service, it seeded Barcelona's data-sovereignty policy and the Barcelona Data Commons network.
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The strongest source is the operator's or the city's own reporting — an official report, dataset or press release. It grades who did the looking — not how well the project went. All four grades →Sources
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📎 Cite this project
1001 Smart Cities (2026). “DECODE — Citizen-Owned Data Ecosystem” — Barcelona, Spain. The Smart City Atlas. https://1001smartcities.org/projects/barcelona-decode/ (last verified 2026-07-25). Data: CC BY 4.0.
The underlying data is free to reuse with attribution — see the open data page.