Istanbul's Digital Archive Crisis: The Key Decisions That Will Shape What Happens to Thousands of Duplicate Municipal Images

Istanbul's municipal digital archives contain tens of thousands of duplicate images — photographs of Sultanahmet's minarets filed twice, aerial shots of the Bosphorus Bridge catalogued under three separate directory trees, construction records from Kadıköy duplicated across at least two separate departmental servers. The Istanbul Metropolitan Municipality, known by its Turkish acronym IBB, is now under pressure to decide how those redundant files get handled, who owns the cleaned-up archive, and what gets permanently deleted.

The urgency is real. Municipal digital storage costs in major Turkish cities have climbed sharply alongside the lira's sustained weakness against the dollar and euro — server contracts priced in foreign currency have become significantly more expensive to maintain over the past three years. City IT procurement officers must renew or renegotiate infrastructure contracts before the end of the third quarter of 2026, making the coming weeks a hard deadline for decisions that will ripple through the archive for years.

What the Backlog Looks Like on the Ground

The duplication problem is concentrated in two areas. First, the IBB's heritage documentation unit, which has been photographing at-risk Ottoman-era structures across Fatih and Eyüp districts since 2019 as part of an earthquake-preparedness survey. Second, the tourism promotion directorate, which draws from a shared image pool but has historically maintained its own parallel library. Neither unit has consistently used the same file-naming convention, and neither has been required to cross-reference the other's holdings before uploading.

The Atatürk Cultural Centre on Taksim Square — reopened in 2021 after a decade of reconstruction — became an early test case. Hundreds of progress photographs taken during its restoration were duplicated across at least three departmental folders, according to the IBB's own internal audit framework published in late 2025. The Rahmi M. Koç Museum in Hasköy, which works with the city on archiving industrial heritage, flagged similar redundancy problems in joint digitisation projects along the Golden Horn waterfront.

Deduplication software capable of handling archives of this scale typically costs between 80,000 and 250,000 euros for a municipal-grade deployment, depending on licensing terms and the volume of files being processed. For the IBB, which administers a city of more than 15 million residents, the political dimension matters too: Mayor Ekrem İmamoğlu's administration has repeatedly emphasised transparency and open-data initiatives, and how the archive decision is handled will be read as a signal about those commitments.

The Decisions That Cannot Wait

Three choices are now directly in front of city administrators. The first is whether to pursue an automated deduplication sweep or a manual, curated review. Automation is faster and cheaper but risks permanently removing images that differ only slightly — a photograph taken seconds apart from a drone over the Galata Tower, for instance, may capture structurally different shadow patterns relevant to conservation work.

The second decision involves access rights. If the cleaned archive is centralised, departments that previously held independent libraries lose some operational autonomy. The heritage documentation unit and the tourism directorate have different legal obligations around image rights and public disclosure, and any merged system has to accommodate both.

The third, and most consequential, question is what deletion actually means. Turkish administrative law requires that certain categories of public records be retained for defined periods — in some cases up to ten years. A photograph classified as a municipal planning document may carry different retention requirements than one classified as promotional material, even if the two files are visually identical.

IBB technical working groups are expected to present a framework to senior administrators before the end of July 2026. If a deduplication and consolidation policy is approved, implementation would likely begin in the autumn, with full rollout targeted before the end of the fiscal year. Heritage advocates in Fatih and conservation professionals monitoring earthquake-vulnerability documentation will be watching closely — once files are gone, no budget line brings them back.