Zurich's Duplicate Image Crisis: What Happens Next and the Key Decisions Ahead

Zurich's municipal digital infrastructure is sitting on a problem that administrators have quietly acknowledged for months: tens of thousands of duplicate images stored across city servers are consuming significant storage capacity, distorting procurement decisions and complicating the roll-out of new public-facing platforms. The question now is who decides what gets deleted, who bears the cost of remediation, and how fast it has to happen.

The issue surfaced in practical terms during the expansion of the Stadt Zürich's open-data portal, which the city's Statistics Office — Statistik Stadt Zürich, based at Napfgasse 6 in the Altstadt — has been developing as part of a broader digitalisation push. Redundant image files, duplicated across departmental servers during years of uncoordinated uploads, have slowed search indexing and inflated cloud storage invoices. No single department owns the cleanup mandate, and that governance gap is now the central obstacle.

Why This Moment Is Different

Three forces are converging to make 2026 the year the duplication problem can no longer be deferred. First, the city's IT spending review, which runs on a four-year budget cycle tied to the Stadtrat's legislative agenda, is due for its mid-term assessment before the end of the third quarter. Any unresolved infrastructure inefficiency identified now rolls into binding budget discussions for 2027. Second, ETH Zurich's Institute for Information Security published findings earlier this year showing that unmanaged digital asset repositories in European municipal systems create measurable security exposure — redundant files that aren't catalogued can't be properly access-controlled. Third, the housing shortage has pushed planning departments to accelerate digital processing of construction permits, putting fresh strain on the same image-handling pipelines already congested with duplicates.

The stakes are more than administrative tidiness. Zurich's cantonal archive, the Staatsarchiv des Kantons Zürich on Winterthurerstrasse 170 in Oerlikon, is in the middle of a multi-year digitisation contract covering historical photographic records. If the metadata standards it's developing clash with the city's existing duplicated file structures, the archive risks ingesting the same problem it was meant to solve. Sources familiar with the project say internal alignment meetings between the Staatsarchiv and the city's IT directorate are scheduled for September.

The Decisions That Will Define the Outcome

Three choices sit on the table and can't be delayed much longer. The first is procurement: whether the city puts a deduplication and asset-management contract out to open tender or routes it through an existing framework agreement with a vendor already embedded in city IT systems. Swiss procurement law under the Bundesgesetz über das öffentliche Beschaffungswesen sets a threshold — contracts above CHF 230,000 must go to open tender. Depending on the scope, this project almost certainly clears that bar.

The second decision is about standards. The city could adopt a metadata schema developed collaboratively with ETH Zurich's library services — which manages one of Europe's largest open-access repositories from its campus on Rämistrasse — or it could build its own. The ETH route offers credibility and interoperability but requires a formal inter-institutional agreement that adds time. Building internally is faster but risks producing yet another siloed system.

The third and politically most sensitive choice is deletion authority. Who signs off on removing a city image asset permanently? In Zurich's consensus-oriented civic culture, that question tends to get bounced upward until it lands with an elected official. The Stadtrat has shown little appetite so far for owning this specific call, but budget pressure is a reliable accelerant.

For residents and businesses interacting with city digital services — from the construction permit tracker to the neighbourhood planning maps accessible through the Geoportal Kanton Zürich — the practical effect of getting this right would be faster load times, more accurate search results and fewer instances of conflicting or outdated images appearing in official planning documents. The cost of getting it wrong is more of what already exists: slow systems, inflated IT bills and staff hours burned on manual workarounds. The September coordination meetings will be the first real test of whether the city's departments can agree on a shared path before the budget window closes.