Barcelona's Digital Archive Push Hits Snag as Duplicate Image Problem Plagues City's Visual Records

Barcelona's municipal digital archive, managed under the Ajuntament de Barcelona's Institut de Cultura umbrella, ran into a concrete technical wall this week when an internal audit revealed thousands of duplicate images stored across at least three separate content repositories. The problem, which came to light during routine maintenance work on the Arxiu Fotogràfic de Barcelona's online portal, is now delaying the publication of new civic photography collections that had been scheduled for release before the summer recess.

The timing matters. The city is midway through a broader push to digitise and open up its institutional image records to the public — a project that connects directly to Ajuntament transparency commitments made by Mayor Jaume Collboni's administration in 2024. Duplicate files slow database queries, inflate storage costs, and, critically, create contradictory metadata entries that make images unsearchable. For a city government that has staked part of its credibility on open-data governance, a messy image archive is more than a housekeeping inconvenience.

What the Audit Found This Week

The Arxiu Fotogràfic, headquartered at Plaça de Pons i Clerch in the Sant Pere neighbourhood, shares image assets with two other municipal platforms: the Barcelona Cultura content management system and the tourism-facing barcelona.cat media library. According to the audit timeline circulated internally this week, the three systems had been ingesting images independently since at least 2019, without a unified deduplication protocol. The result is an estimated overlap running into the tens of thousands of files — the exact figure is still being calculated.

The issue became operationally urgent because of a July 1 deadline tied to the city's participation in the Europeana digital heritage platform, which aggregates cultural collections from institutions across the European Union. Barcelona had committed to uploading a refreshed batch of archival photographs covering the Eixample district's urban development in the early twentieth century. That upload has been paused pending a clean dataset.

For context on scale: the Arxiu Fotogràfic holds a collection of more than 350,000 digitised images spanning the city's history from the 1890s onwards — a figure the institution itself published on its public-facing pages earlier this year. Even a duplication rate of five percent represents a significant volume of redundant data to unpick manually.

A Fix in Progress, But No Quick Resolution

The technical team at the Institut Municipal d'Informàtica, which maintains the server infrastructure for most Ajuntament digital services from its offices near Carrer de Tànger in the 22@ innovation district, is running automated deduplication scripts across the affected repositories. The process compares file hashes and metadata timestamps to identify exact and near-exact copies. Near-duplicates — slightly cropped or recoloured versions of the same original photograph — require manual review, and that backlog is the current bottleneck.

The 22@ district framing is relevant beyond geography. Barcelona has spent years positioning the neighbourhood as proof that the city can build tech capacity inside public institutions, not just in private startups. A stumble on something as fundamental as image-library hygiene feeds a running argument among critics of the administration about whether the municipality's digital transformation has prioritised announcements over infrastructure.

The Europeana submission deadline has been informally extended to September 1, according to the project documentation circulated this week, giving the archive roughly two months to produce a clean export. Anyone who relies on the Arxiu Fotogràfic portal for research — journalists, architects working on heritage permits in Gràcia or Poble Sec, documentary filmmakers — should expect intermittent slowdowns in the search interface throughout July as the deduplication work continues. The barcelona.cat media library, used heavily by travel publishers and news organisations, is not affected by the current maintenance window and remains fully operational.

The Institut de Cultura has indicated it plans to publish a new image-governance protocol before the end of the third quarter, which would establish a single point of ingestion for all new photographs entering the municipal system. Whether the three platforms eventually merge into one database or continue operating separately with a shared deduplication layer is still under internal discussion.