Berlin's Digital Archives Are Drowning in Duplicate Images — and Officials Are Finally Talking About It

Berlin's municipal digital infrastructure has a clutter problem. Across dozens of city agencies, duplicate images — identical or near-identical photographs stored in multiple databases simultaneously — are consuming terabytes of server capacity and inflating IT maintenance budgets, according to discussions that have surfaced in recent weeks among technology administrators and archivists working inside Berlin's Senate departments.

The issue sounds mundane. It isn't. With the city currently investing heavily in digital transformation across public services — from housing application portals to the BVG transit network's operations management systems — redundant data is increasingly cited by IT specialists as a structural drag on those efforts. The Berliner Senatsverwaltung für Stadtentwicklung, Bauen und Wohnen, which manages enormous volumes of planning documents and site photography, has been identified internally as one of the departments where the problem is most acute.

What Officials and Experts Are Saying

Administrators at the Zentraler IT-Dienstleister des Landes Berlin (ZIT-BB), the agency responsible for managing the city's shared technology infrastructure, have acknowledged in public budget sessions this year that storage rationalisation is a priority for the 2026-2027 fiscal cycle. Duplicate image replacement — meaning the systematic identification, consolidation, and clean-up of redundant visual files — is listed among the operational targets under Berlin's current Smart City Strategy, which runs through 2030.

Digital archivists working with Landesarchiv Berlin, located on Eichborndamm in Reinickendorf, have raised the issue in professional circles for several years. The concern is not purely financial. When an agency updates an official image — say, a photograph of a construction site in Lichtenberg that has since been redeveloped — outdated duplicates left in secondary repositories can feed into public-facing platforms and generate factually incorrect information. For a city managing a housing crisis in real time, that kind of data degradation carries practical consequences.

Private-sector voices are joining the conversation. Berlin's startup ecosystem, particularly companies based in Mitte and Prenzlauer Berg working on municipal SaaS contracts, has been developing automated deduplication tools tailored to German public-sector data-handling standards, including DSGVO compliance requirements. At least two firms operating out of the Factory Berlin campus on Rheinsberger Straße have demoed relevant products to city procurement officials in the past six months, according to industry contacts familiar with the meetings.

The Numbers Behind the Problem

Precise city-wide figures have not been made public. However, broader European data provides useful scale. A 2024 report by the European Commission's Joint Research Centre estimated that European public administrations collectively waste between 15 and 25 percent of their cloud storage budgets on redundant or obsolete data — a category that includes duplicate images. For Berlin, which allocated roughly €180 million to IT and digitalisation in its 2025 Senate budget, even a conservative application of that estimate suggests tens of millions of euros are bound up in storage inefficiency.

The BVG, Berlin's public transport operator, offers a concrete local case study in scale. The authority maintains extensive photographic records of its network — from U-Bahn tunnel inspections along the U8 line to surface infrastructure monitoring across the Ringbahn — and has been migrating these onto centralised platforms as part of its broader digitalisation push. That process has, according to technology staff familiar with transit infrastructure projects, repeatedly surfaced large volumes of duplicate image files accumulated over years of departmental siloing.

What happens next depends partly on procurement timelines and partly on political will inside the SPD-led Senate coalition. Digital affairs advocates are pushing for a mandatory deduplication audit to be written into the next round of IT framework contracts, which are due for renewal in early 2027. Housing and urban planning offices on Württembergische Straße in Wilmersdorf are understood to be among the first in line for any pilot programme. For Berliners watching public money go into digital services, the underlying message from the experts is straightforward: a city cannot build smart infrastructure on top of messy data.