Istanbul's Digital Archives Get a Jolt: Duplicate Image Replacement Moves From Backlog to Priority

Istanbul's cultural institutions hit a concrete milestone this week. The Istanbul Metropolitan Municipality's directorate for digital services confirmed Tuesday that a city-wide audit of its online image databases — covering everything from Bosphorus waterfront planning maps to neighbourhood renewal photography from Gaziosmanpaşa — had identified more than 14,000 duplicate entries clogging portals that residents, journalists, and urban planners rely on daily. Work to replace those entries with correctly catalogued originals began on July 1 and is expected to run through the end of August.

The timing matters. Istanbul is six months into a broader e-government push tied to the CHP-led municipality's 2026 digital transparency agenda, and duplicated or mislabelled archive images have repeatedly embarrassed official communications — most visibly when renovation announcements in Balat and Fener last spring ran with the wrong before-and-after photographs, triggering criticism from heritage preservation groups. Cleaning up that data layer is now treated as infrastructure work, not housekeeping.

What the Week's Work Actually Looked Like

The practical effort centred on two institutions. SALT Research, which holds one of the city's largest open-access photography collections at its Galata building on Bankalar Caddesi, began integrating a new hash-based deduplication tool into its public image portal on Monday. The tool flags visually identical files even when they carry different file names or metadata — a problem that had accumulated over years of digitisation drives. SALT's collections team said in a published update on the institution's website that roughly 3,200 records in its Ottoman-era urban documentation series were affected.

Separately, the Istanbul Archaeological Museums — whose image library covers artefacts from three sites including Topkapı and the Ancient Orient Museum in Sultanahmet — began a parallel review of their digital asset management system this week after an internal April audit found that several hundred item photographs had been duplicated across catalogue entries for different accession numbers. The museums operate under the Ministry of Culture and Tourism, meaning their remediation timeline is tied to Ankara's procurement cycles, which typically run slower than municipal ones.

For private actors, the week brought practical pressure from a different direction. Turkish e-commerce regulations that came into force in March 2026 require marketplace sellers to use original product images rather than redistributed stock photographs, with spot-check enforcement beginning this quarter. In Istanbul's dense Laleli wholesale district, where hundreds of textile vendors list goods across multiple platforms, that rule has forced many small operators to hire local photographers or invest in image management software for the first time. A basic annual licence for one widely used Turkish-market deduplication platform currently runs around 4,800 Turkish lira — a meaningful cost for a single-person operation, given the lira's ongoing purchasing pressure.

Why This Keeps Coming Up

Duplicate image problems are not exotic. They emerge wherever digitisation has happened in waves — different teams, different standards, different software — with no single master catalogue enforcing consistency. Istanbul's archive situation is a product of exactly that: the city's cultural documentation has been digitised across at least four separate grant-funded programs since 2010, each using its own metadata schema.

The earthquake risk context adds urgency. Since the February 2023 Kahramanmaraş disaster, institutions across Turkey have accelerated digitisation of physical archives as a preservation measure. Speed, though, generated duplication. The Istanbul University Library's Rare Works Collection in Beyazıt, for instance, scanned more than 40,000 map and photograph items in an eighteen-month sprint beginning in late 2023. Library staff have acknowledged in published progress reports that quality control on that tranche is still ongoing.

Anyone maintaining a digital collection in Istanbul — whether a public institution, a university, or a Laleli wholesaler — should expect deduplication to become a standing operational requirement rather than a one-off project. The municipality's digital services directorate has indicated it plans to publish its full audit methodology as open documentation by September, which would give smaller organisations a free framework to run their own reviews. Institutions that use the IBB's shared cloud infrastructure may also be brought under a centralised image-integrity check in the fourth quarter of 2026, though that rollout has not yet been formally confirmed.