How Paris Ended Up with a Duplicate Image Problem — and Why It Is Only Getting Worse

Paris now holds tens of thousands of redundant digital images across its municipal archive systems — the same photograph of the Pont des Arts, the same aerial of La Défense, the same shot of schoolchildren in the 19th arrondissement filed twice, three times, sometimes more — and city administrators are only beginning to reckon with the cost of that disorder. The problem did not appear overnight. It accumulated, file server by file server, over roughly a decade of accelerating digital production, and the bill for fixing it is becoming impossible to ignore.

The timing matters because Paris is at an inflection point. The 2024 Olympic and Paralympic Games generated an unprecedented volume of publicly commissioned photography — event documentation, venue portraits, transport upgrades along Line 14 of the Grand Paris Express, legacy activation campaigns across the Seine-Saint-Denis corridor. Agence Parisienne du Climat, the city's climate agency, and Paris Musées, the network overseeing fourteen municipal museums, both expanded their digital libraries significantly in the run-up to and aftermath of those Games. Neither organisation operates from a unified asset management platform. Duplicates multiplied in the gap between them.

A Decade of Digital Accumulation Without a Central Registry

The structural cause goes back further than 2024. Paris launched its first serious push toward open data and digital transparency around 2015, when the Mairie de Paris began publishing municipal datasets and image libraries through the Paris Data portal. At that stage, individual departments — urban planning, culture, transport, social services — uploaded materials independently. There was no deduplication protocol, no shared metadata standard, and no single administrator with authority over the whole estate. Within five years, the same images were appearing in the archive under different file names, different dates, and sometimes attributed to different photographers.

The problem compounded during the Covid-19 period, when remote working meant that staff across different arrondissements were digitising legacy photographic collections — physical prints and slides from as far back as the 1980s — without coordinating with colleagues doing the same work two kilometres away. The Bibliothèque historique de la Ville de Paris, based on Rue de Rivoli, and the Atelier Parisien d'Urbanisme, known as APUR, both digitised significant portions of their collections between 2020 and 2022. Cross-referencing between the two institutions was minimal.

By 2023, a study commissioned internally by the Direction des Systèmes et Technologies de l'Information — the city's central IT directorate — found that storage costs for municipal image archives had risen by more than 40 percent over the previous four years, partly attributable to redundant files. That figure was cited in budget discussions at the Hôtel de Ville ahead of the 2024 fiscal year, according to documents circulated to councillors on the Commission des Finances.

What Comes Next for the Archive

The practical consequences of the duplicate problem are not merely administrative. When the city's communications teams pull images for campaigns — the current Seine urban regeneration push along the Quai de Valmy and Quai de Jemmapes being a live example — they routinely encounter conflicting versions of the same file: different crops, different colour treatments, uncertain rights clearances. That slows production and occasionally results in images being published without proper licensing confirmation.

City officials are now examining a phased migration toward a unified Digital Asset Management system, with a pilot programme expected to launch in the fourth quarter of 2026 covering Paris Musées and the Direction de l'Urbanisme. The goal is a single searchable repository with automated hash-based deduplication — technology that flags identical or near-identical files before they are ingested. Full rollout across all municipal departments is not expected before 2028 at the earliest, given the complexity of existing contracts with third-party storage providers.

For anyone working with Paris municipal imagery in the meantime — journalists, researchers, architects bidding on Grand Paris Express station design contracts — the practical advice is blunt: always request a rights confirmation from the originating department, never assume that a file pulled from Paris Data carries a cleared licence, and check the metadata date against the actual content. The archive is large, unwieldy, and still growing. The clean-up has started, but it has barely started.