Barcelona's Digital Archive Crisis: The Key Decisions Ahead on Duplicate Image Replacement

Barcelona's major cultural institutions face a converging deadline. Across the Arxiu Municipal de Barcelona, the MNAC digital collections and the Ajuntament's open data portal, archivists and IT managers are confronting a problem that has quietly accumulated for years: tens of thousands of duplicate, mislabelled or low-resolution images occupying the same catalogue space as authoritative originals, with no unified protocol deciding which version survives.

The urgency is real and administrative. The Ajuntament de Barcelona committed in its 2024-2027 digital transition plan to a fully auditable open image archive by the end of 2026. That gives institutions roughly six months to resolve conflicts that have piled up since the city began digitising paper records in earnest after 2015. For the teams involved, the question is no longer whether to act — it is which images replace which, who decides, and what standard governs the choice.

What the Duplication Problem Actually Looks Like on the Ground

The issue is not abstract. At the Arxiu Fotogràfic de Barcelona, housed on Plaça de Pons i Clerch in the Sant Pere neighbourhood, staff manage a collection that runs to more than four million items. A significant share of those have been scanned multiple times — once from glass negatives, again from contact prints, sometimes a third time from later copy negatives — with each iteration entered into the catalogue separately. Metadata conflicts between versions are common: a photograph of the 1888 Universal Exhibition site appears under at least three different accession numbers with contradictory date fields.

The MNAC, sitting above the city on Montjuïc, has its own parallel difficulty. Its Museu Digital project, which launched publicly in 2021, ingested images from several earlier digitisation rounds without a deduplication pass. The result is that a visitor searching for a specific Romanesque fresco panel may encounter the same work rendered at four different resolutions with four different rights statements — some marked public domain, others restricted — depending on which database entry they land on first.

Neither institution is alone. The city's open data portal at opendata-ajuntament.barcelona.cat lists image datasets from more than a dozen municipal departments, many of which were uploaded independently. Formats range from TIFF masters to compressed JPEGs, and file-naming conventions vary by department and by decade.

The Decision Framework Being Assembled

Three specific choices will define what the replacement process looks like in practice. First, institutions must settle on a master-record standard: which version of a duplicate image becomes canonical. Archival consensus generally favours the highest-resolution scan taken from the original physical object, but that rule breaks down when the physical original has since deteriorated or been transferred to a different holding institution.

Second, the city must decide how to handle rights conflicts. Images digitised under one contractual arrangement may carry restrictions that the higher-resolution replacement does not, or vice versa. Resolving these cases requires legal review, not just technical deduplication. The Institut de Cultura de Barcelona, which oversees both the Arxiu Fotogràfic and the Arxiu Municipal, is the body with formal authority to arbitrate those disputes — but its resources are finite and its timeline tight.

Third, and most consequential for public access, is the question of what happens to the replaced files. Permanent deletion risks destroying provenance trails that researchers rely on. Keeping every superseded version defeats the purpose of the exercise and perpetuates the metadata chaos. A tiered retention model — masters publicly accessible, duplicates archived in a restricted repository with a documented audit trail — is under discussion, according to publicly available minutes from the Consell Municipal de Cultura's March 2026 session.

For researchers working at the Biblioteca de Catalunya on Carrer de l'Hospital, or doctoral students pulling image citations from the Dipòsit Digital de la UB, the practical effect of getting this wrong is citation rot: links to images that either disappear or silently redirect to a different version of the same work. Getting it right, by contrast, would make Barcelona's visual archive one of the more reliably citable municipal collections in southern Europe. The city has until 31 December 2026 to demonstrate progress. The technical work is secondary. The governance decisions come first.