Helsinki's Duplicate Image Audit Is Done — Now Comes the Hard Part

Helsinki's public records offices have completed a city-wide audit of duplicate digital images held across municipal systems, and the findings are forcing a reckoning: what to do with roughly 40,000 redundant files sitting across at least six separate databases maintained by the city. The audit, which wrapped up in late June 2026, now hands elected officials and department heads a stack of unresolved questions about licensing, archival responsibility, and budget — none of which have easy answers.

The timing matters. Helsinki is midway through a broader digital infrastructure overhaul tied to its Digihelsinki 2025–2030 programme, which is consolidating city services onto a unified cloud platform. Duplicate image files are not a trivial housekeeping problem in that context: redundant files inflate storage costs, create legal exposure when licensing records are unclear, and can undermine the integrity of the Helsinki City Museum's public-facing digital archives. Getting this wrong now means embedding the mess into the new system.

What the Review Found — and Where the Pressure Points Are

The duplicate problem cuts across multiple institutions. The Helsinki City Museum, based on Aleksanterinkatu in the city centre, holds digitised historical photographs that appear in at least two other city databases — including those maintained by the Urban Environment Division, which oversees planning documents and street-level imagery for the Kalasatama and Pasila development corridors. The Helsinki Metropolitan Area Libraries network, which serves residents across Espoo, Vantaa and Helsinki through the HelMet system, also flagged overlapping image assets during a separate internal review in March 2026.

The central legal question is licensing. A significant share of the duplicate images were acquired under contracts that specified single-system use. Retaining those images in a consolidated platform without renegotiating terms would put the city in breach of those agreements. City legal counsel must now work through each vendor contract — a process that archivists familiar with the HelMet digitisation project have previously described, in general terms, as running to hundreds of individual agreements. The city has not publicly stated how many contracts are at issue in this specific audit.

Budget is the other pressure point. Cloud storage on the new Digihelsinki platform is priced per gigabyte, and the city's IT division has indicated in planning documents from April 2026 that the migration budget for 2026–2027 is set at approximately €4.2 million. Carrying tens of thousands of unnecessary files into that migration eats directly into that allocation. Every duplicated high-resolution image file — many run to 50 megabytes or more — adds cost without adding value.

The Decisions That Cannot Wait

Three choices are now in front of Helsinki's city council culture and technology committees, both of which are expected to receive formal briefings before their September sitting dates.

First, the city must decide who owns the canonical version of each duplicated asset. The Helsinki City Museum, the Urban Environment Division and HelMet all have legitimate curatorial claims on overlapping material. Without a clear authority, the same standoff will re-emerge on the new platform within months of launch.

Second, officials need to determine which files can simply be deleted and which require permanent archival retention under Finland's Archives Act. The National Archives of Finland, based in Rauhankatu in central Helsinki, sets binding standards on what municipal bodies must preserve. Any deletion programme that bypasses those standards risks legal challenge.

Third, and most practically, the city must decide whether to run a competitive tender for a deduplication software solution or handle the clean-up manually through existing staff. A comparable consolidation project carried out by the City of Tampere in 2023 reportedly took eight months and required temporary contractor support, according to a Finnish municipal IT industry report published that year — though Helsinki's volume of files is understood to be considerably larger.

The September committee sessions will be the first real test of whether the Digihelsinki programme's governance structure can make these calls cleanly or whether turf disputes between departments slow everything down. Residents who rely on the Helsinki City Museum's online archive — which logged more than 280,000 unique visits in 2025 — have a direct stake in the outcome. A botched migration could take parts of that archive offline for months.