Barcelona's Digital Archive Push Tackles the Duplicate Image Problem Head-On This Week

Barcelona's municipal photography archive, maintained by the Arxiu Fotogràfic de Barcelona on Plaça de Pons i Clerch in the Sant Pere neighbourhood, confirmed this week that an internal audit launched in May had identified tens of thousands of duplicate images clogging its public-facing digital catalogue. The finding has pushed the city's cultural data managers to accelerate a deduplication drive that archivists say was already overdue.

The timing is not accidental. Mayor Jaume Collboni's office has been building toward an autumn rebranding campaign tied to the revised tourist tax framework, which city hall began expanding in earnest in late 2025. Clean, licensable, non-duplicated visual assets are essential to that effort — confusion over image rights and redundant catalogue entries has already delayed at least one promotional tender, according to documentation reviewed by The Daily Barcelona.

What the Audit Found and Who Is Fixing It

The duplicate problem is broader than any single institution. The Barcelona Activa innovation agency, which runs the city's startup support programmes out of its Edifici MediaTIC base on Carrer de Roc Boronat in Poblenou, has been co-ordinating with three local tech firms to pilot AI-assisted deduplication tools since January. One of those firms, operating within the 22@ district's cluster of visual-tech companies, has been testing perceptual hashing software — a method that identifies near-identical images even when file names or metadata differ — on a test batch of roughly 80,000 archive photographs. Results from that pilot, shared at a Barcelona Activa working session on 1 July, showed the tool flagging a duplicate rate of around 34 percent in the test batch, a figure that startled several attending archivists.

The Consorci de Biblioteques de Barcelona, which manages digital image collections across the city's 40-plus public library branches, has separately been running its own deduplication review since March. Librarians at the Biblioteca Sant Pau i Santa Creu on Carrer de l'Hospital in the Raval had already flagged the issue informally last year, noting that certain collections of neighbourhood photography had been uploaded multiple times under different digitisation contracts, inflating apparent catalogue size without adding content.

For institutions that license images to publishers, travel platforms and media organisations, duplicate records carry a direct financial cost. A single photograph appearing under four separate catalogue identifiers means four separate rights queries, four rounds of metadata verification, and — in the worst cases — conflicting licensing terms applied to what is legally one asset. The city's revised tourist tax, which now applies to cruise passengers docking at the Port de Barcelona and generates revenue earmarked partly for cultural infrastructure, makes investment in these back-end systems politically easier to justify than it was two years ago.

What Happens Next for Users and Institutions

Barcelona Activa has indicated it intends to publish a procurement framework by September 2026 for a city-wide image deduplication service that all municipal bodies could access under a shared contract. That would bring the Arxiu Fotogràfic, the Consorci de Biblioteques and smaller departmental archives under a single technical standard for the first time.

For freelance photographers, journalism organisations and small media companies that regularly license images from municipal collections, the practical advice from archivists this week is straightforward: hold off on bulk downloads from the Arxiu Fotogràfic's online portal until the new catalogue goes live, expected in the fourth quarter of 2026. The current catalogue will remain accessible, but a significant number of entries are likely to be merged or removed once deduplication is complete.

The 22@ district's visual-tech cluster, which has grown substantially since the neighbourhood's post-industrial rezoning, is positioning the Barcelona pilot as a template it hopes to sell to other European municipal archives facing the same sprawl. Madrid's Archivo Regional de la Comunidad has been dealing with a comparable backlog, and conversations between the two cities' cultural data teams are ongoing, though no formal agreement has been signed.

The audit's final report is expected to land on Collboni's desk before the end of July.