How Stockholm's Digital Archives Ended Up Full of the Same Image Twice — and What the City Is Doing About It

Stockholm's city administration is replacing thousands of duplicate images across its public-facing digital platforms this summer, a cleanup operation that traces back to a series of fragmented digitisation drives launched between 2017 and 2022. The work is unglamorous but consequential: duplicate files have slowed content management systems, inflated storage costs, and — in several cases — caused outdated photographs of demolished or redesigned sites to appear alongside current planning documents.

The problem did not appear overnight. For much of the past decade, Stockholm's district administrations operated with significant autonomy over their own digital asset libraries. Södermalm, Östermalm, and the inner-city planning office at Stadsbyggnadskontoret on Fleminggatan each maintained separate repositories, often with no shared tagging standard or central registry. When the city moved toward unified platforms beginning around 2020, images were migrated wholesale — duplicates included.

A Patchwork of Digitisation Projects

The roots of the duplication issue lie partly in the city's own ambition. Stockholm Stad launched its first major push to digitise neighbourhood documentation through the Stadsarkivet, the city archive on Kungsklippan, in 2017. That project captured tens of thousands of photographs of buildings, public spaces, and infrastructure. The following year, a separate contract was awarded to update imagery for the Stockholmskallan heritage portal. Neither project cross-referenced the other's output in any systematic way.

By 2021, when the city's communications department began consolidating visual assets onto a single content delivery platform ahead of Stockholm's post-pandemic tourism recovery push, project managers found multiple versions of the same image — sometimes three or four copies — tagged under different file names, in different resolutions, attached to different departments. A photograph of Slussen taken during the 2018 reconstruction phase, for instance, appeared in at least six separate folders across three administrative units, according to a summary of the consolidation audit circulated internally that year.

Storage was not cheap. Stockholm Stad's annual IT infrastructure spending has grown steadily through the 2020s, and redundant media files represent a measurable share of that burden. While precise figures for the image-duplication subset have not been made public, comparable Swedish municipalities that undertook similar audits have reported that duplicate and orphaned media files account for between 8 and 15 percent of total digital storage use — a range cited in a 2023 report by the Swedish Association of Local Authorities and Regions, SKR.

The Replacement Process and What Comes Next

The current replacement project, coordinated out of the Stadsledningskontoret — the city executive office — began in earnest in April 2026. It involves both automated deduplication tools and manual review by staff at the communications unit. Priority has been given to images embedded in active planning applications, public consultation pages for areas including Hagastaden and the Slakthusområdet development zone in Johanneshov, and the official tourism subsite under stockholm.se.

The manual review element is the more time-consuming piece. Automated tools can flag pixel-identical duplicates with high confidence, but near-duplicates — same subject, slightly different crop or exposure, taken minutes apart — require human judgment about which version carries the most current and accurate information. That distinction matters especially for streets and squares undergoing active construction, where a photograph from 18 months ago may show a streetscape that no longer exists.

City officials have not announced a formal completion date for the project, but the internal working timeline reviewed by The Daily Stockholm indicates a target of having all high-priority platform sections updated before the end of August 2026. Lower-priority archival sections, including historical sub-pages of the Stadsarkivet portal, are expected to be addressed by the first quarter of 2027.

For residents and journalists who rely on Stockholm Stad's digital platforms for planning information, the practical upshot is straightforward: images attached to consultation documents for major projects should be treated as current only if they carry a visible capture date. Where no date appears, the city's planning helpline at Stadsbyggnadskontoret can confirm when site photography was last updated. The office is reachable on weekdays at the Fleminggatan address or through the contact portal on the city's main website.