Barcelona's Visual Archives Are Full of Duplicate Images — Here's What Officials, Experts and Key Figures Are Saying

Barcelona's public institutions are sitting on a growing mountain of duplicate digital images — redundant files clogging archives, slowing research workflows and running up storage bills that, in at least one municipal department, account for a measurable share of annual IT overhead. The Ajuntament de Barcelona's communications and digital innovation units have acknowledged the issue internally, and pressure is now building from archivists, urban data specialists and open-government advocates to act before the problem compounds further.

The issue has sharpened this summer for a specific reason: the city's ongoing push to digitise neighbourhood planning records, tourist-flow mapping data and heritage documentation as part of the Pla Digital 2025-2028 framework means that raw image volumes are increasing faster than deduplication protocols can catch up. Every aerial photograph of the Eixample grid, every snapshot of Barceloneta's seafront taken for port impact assessments, risks existing in three or four redundant versions across disconnected departmental servers.

What Archivists and Data Specialists Are Flagging

The Arxiu Nacional de Catalunya, headquartered on Carrer dels Doctors Roux in the upper part of the city, manages digitised collections stretching back decades. Archivists working in that environment have long argued that duplicate imagery is not merely a storage nuisance — it creates genuine confusion about provenance and authenticity. When two near-identical photographs of the same document or streetscape exist with different metadata timestamps, determining which version is canonical becomes a legal and administrative headache, particularly in property disputes or heritage-listing challenges.

At the municipal level, the Institut Municipal d'Informàtica — the body that handles technology infrastructure for the Ajuntament — has been working since early 2025 on updated data governance standards. Those standards include hash-based deduplication checks for image uploads across city platforms, but implementation has been uneven across departments. Urban planning, tourism management and the press office all maintain partially separate image repositories, meaning a single photograph taken at Plaça de Catalunya during a public event might live in four different folders with four different filenames and no automated cross-reference.

Independent digital consultants working with Barcelona's growing startup and tech ecosystem — particularly those operating out of the 22@ innovation district in Poblenou — point to the same structural gap. The tools to solve this exist and are widely used in the private sector. The Barcelona Supercomputing Center, based at the Parc Científic de Barcelona near Pedralbes, has the computational capacity to run large-scale deduplication processes. The gap is governance, not technology.

The Practical and Financial Stakes

Cloud storage is not free. Municipal cloud contracts in European cities of Barcelona's scale typically run into seven-figure annual expenditure, and industry benchmarks from public sector IT procurement suggest that duplicate files can account for between 20 and 40 percent of total stored data in organisations that lack automated deduplication. Applied to a city the size of Barcelona — which had a 2026 municipal budget of roughly 3.6 billion euros — even a fraction of wasted storage spend represents real money that could be redirected to housing services or infrastructure maintenance.

Mayor Jaume Collboni's administration has made digital transparency a stated priority, and the expansion of the tourist tax — now reaching up to seven euros per night for high-end accommodation — has partly been justified as funding for city services including digital infrastructure. That political context makes wasteful data management harder to defend publicly.

The practical path forward, according to digital governance advocates, runs through three steps: a full audit of image repositories across all Ajuntament departments, adoption of a unified metadata standard for all new uploads, and a retrospective deduplication sweep using existing tools. The Consorci Localret, a Catalan network of local governments focused on digital services, has piloted similar processes in smaller municipalities and could offer a replicable model for Barcelona. The question is whether the political will exists to prioritise unglamorous infrastructure work when housing and tourism headlines dominate the agenda. For archivists and data professionals, the answer cannot wait much longer.