Berlin's Digital Archives Are Full of Duplicate Images — and Officials Are Finally Talking About It

Berlin's public digital infrastructure has a redundancy problem. Across dozens of municipal databases, planning portals and cultural repositories, duplicate images — the same photograph or scan stored multiple times under different filenames — are consuming terabytes of taxpayer-funded server capacity. Now, after years of quiet frustration inside city agencies, officials and digital governance experts are speaking out about the scale of the problem and what they believe needs to happen next.

The timing matters. The SPD-led Senate coalition has committed to accelerating Berlin's digital transformation under its Koalitionsvertrag priorities, and the city's IT service provider ITDZ Berlin is midway through a multi-year infrastructure consolidation. Redundant image files are not a glamorous issue, but inside the Senatsverwaltung für Inneres und Digitalisierung, they represent a concrete obstacle to the kind of lean, interoperable systems the coalition has promised voters.

What the Experts Are Saying

Digital archivists at the Landesarchiv Berlin, located on Eichborndamm in Reinickendorf, have been among the most vocal. Staff there have raised concerns internally about the absence of any city-wide deduplication standard — meaning each agency essentially decides for itself how to handle image storage, often defaulting to saving everything. The result is sprawling, overlapping collections that slow retrieval times and complicate future migration projects.

Researchers affiliated with the Technische Universität Berlin's Information Systems group have described the broader phenomenon in academic terms: without mandatory hash-based deduplication protocols applied at the point of upload, municipal systems will continue accumulating redundant files at a rate that outpaces any storage expansion budget. The TU group has been consulting on smart-city data projects in the Adlershof technology park, where several Berlin startups are developing image-management tools aimed at exactly this problem.

At the district level, administrators in Friedrichshain-Kreuzberg — one of Berlin's most document-heavy boroughs owing to its density of listed buildings requiring photographic condition records under Denkmalschutz regulations — have described the situation as quietly untenable. Planning offices there routinely receive image submissions from architects, developers and residents that duplicate files already held elsewhere in the system, with no automated check to flag the overlap before storage is allocated.

The Numbers Behind the Problem

ITDZ Berlin's 2025 annual report noted that the agency manages data infrastructure for more than 80 Senate departments and district offices. Industry benchmarks for public-sector image repositories suggest that duplicate files can account for between 20 and 40 percent of total stored image volume in organisations without active deduplication policies — a range that, applied to Berlin's scale, points to a significant and largely invisible cost.

Storage is not cheap. Enterprise-grade archival storage of the type used by ITDZ Berlin carries ongoing operational costs that compound over years. City councillors on the Hauptausschuss, the budget committee that reviews ITDZ expenditure, have begun asking more pointed questions about whether the agency's storage budget reflects genuine data growth or accumulated inefficiency. The committee meets again in September.

Several Berlin-based technology firms, including companies operating out of the Factory Berlin campus in Mitte, have proposed pilot deduplication projects to the Senatsverwaltung. Those conversations are ongoing, according to procurement notices published on the city's Berlin.de tender portal in June 2026, though no contract has been awarded as of this week.

For Berliners, the practical stakes go beyond server costs. Slow or duplicated image databases affect how quickly planning applications are processed in their neighbourhood, how efficiently historical records are retrieved from the Landesarchiv, and whether digital-first public services actually deliver on their promise. Officials across multiple agencies now broadly agree on the diagnosis. The harder work — agreeing on a shared technical standard, allocating budget, and pushing it through the Senate's digital governance structures — is what comes next. The September Hauptausschuss session will be an early test of whether that consensus translates into action.