Istanbul's Digital Archives Race to Fix a Duplicate Image Crisis Swamping Municipal Records

Municipal archivists at Istanbul's Atatürk Library in Taksim formally began a structured duplicate-image-replacement program on July 1, targeting a backlog of digitised photographs estimated internally to run into the tens of thousands of redundant files. The effort, coordinated through the Istanbul Metropolitan Municipality's cultural heritage directorate, is the first systematic attempt to clean up a digital catalogue that expanded rapidly during the pandemic years but without consistent quality controls.

The timing is not arbitrary. Turkey's national digitisation standards body, the Turkish Standards Institute (TSE), updated its metadata framework for public-sector image archives in April 2026, giving municipalities a six-month window to bring collections into compliance or risk losing eligibility for central government co-funding tied to heritage preservation. For a city where earthquake retrofitting, inflation pressures on the lira, and the ongoing Bosphorus shoreline development debate already stretch budgets thin, losing that funding stream would sting.

What the Problem Actually Looks Like on the Ground

The practical failure is straightforward: when archivists bulk-uploaded scanned prints from the Beyoğlu district holdings between 2021 and 2023, automated ingestion tools created duplicate entries whenever a file was re-scanned at higher resolution without deleting the original low-resolution version. Some images of landmarks including the Galata Tower and the historic tram lines along İstiklal Avenue now appear under three or four separate catalogue numbers, each with slightly different metadata tags. Researchers at Boğaziçi University's history department flagged the problem publicly in a February 2026 working paper, noting that the duplication was producing false search results and making reliable citation nearly impossible.

The Atatürk Library is not the only institution affected. The Istanbul Research Institute on Şişhane Street, which holds one of the city's most extensive private collections of Ottoman-era photographs, launched its own internal audit in May after discovering that image files donated by private collectors had been entered into its database multiple times during a 2022 migration from an older content management system. Staff there are working through roughly 4,200 flagged files, cross-referencing physical catalogue cards against digital entries to establish which version of each image should be designated the master copy.

The Fix — and Who Pays for It

The Metropolitan Municipality's program runs through September 30, 2026. It pairs in-house archivists with a contracted software team using perceptual hashing tools — algorithms that detect visually identical or near-identical images even when file names differ — to flag duplicates for human review. The contract, awarded following a public tender process, is valued at 4.2 million Turkish lira, according to procurement documents posted on the municipality's transparency portal last month.

That figure underscores the resource reality. At current exchange rates the sum is modest, and archivists privately acknowledge through the institution's published workplan — not through individual interviews — that the timeline is aggressive. The workplan, posted on the Metropolitan Municipality's website in late June, identifies Fatih and Beyoğlu district photo collections as first-phase priorities, with the Kadıköy and Üsküdar holdings scheduled for the second phase starting in August.

For researchers, journalists, and documentary filmmakers who rely on these archives — including production teams working on the wave of historical drama series shot partly on location in Istanbul's older neighbourhoods — the clean-up matters practically. Mislabelled or duplicated images have in several documented cases led to incorrect captions in published books and exhibition catalogues, a reputational problem the institutions want resolved before the city's 2026 autumn tourism season brings fresh international attention to its heritage collections.

Anyone needing access to specific collections during the remediation period should contact the Atatürk Library's reader services desk directly before visiting; portions of the digital catalogue will be taken offline in rotating windows through July and August as files are re-indexed. The Istanbul Research Institute is maintaining full public access throughout its own audit, though search results in its online portal will carry a caveat flag on records still under review.