Istanbul's Municipalities Race to Fix Duplicate Image Problem Plaguing Official Urban Databases This Week

Istanbul's district municipalities spent much of this week quietly firefighting a technical embarrassment: duplicate and mismatched images embedded in official urban planning databases have been found attached to the wrong parcels, wrong buildings, and in some cases entirely the wrong neighbourhoods. The problem surfaced publicly on Monday, July 1, when residents in Kadıköy reported that the digital property record for a six-storey apartment block on Moda Caddesi was displaying a warehouse photograph from a completely different district.

The timing is uncomfortable. Istanbul's metropolitan authority, the İBB — the Istanbul Metropolitan Municipality led by Mayor Ekrem İmamoğlu's CHP administration — has been pushing hard on digital transparency as a political differentiator from the ruling AKP government in Ankara. The urban data portals, which sit under the İBB's directorate for Geographic Information Systems, were expanded in 2024 as part of a broader open-government initiative. A duplicate-image error of this scale, running across multiple district databases, undercuts that narrative at precisely the moment the portals are seeing record public traffic ahead of updated earthquake-risk disclosure requirements.

How the Error Spread Across Districts

The root cause, as explained in a technical notice posted to the İBB's GIS portal on Wednesday, appears to trace back to a bulk image migration carried out in March 2026, when legacy photograph archives were consolidated from separate district servers onto a unified cloud infrastructure. During the migration, a filename-collision error caused image files with identical numerical prefixes to overwrite correct linkages in the database index. The result: roughly 14,000 parcel records across at least seven districts — confirmed in the Wednesday notice to include Kadıköy, Üsküdar, Beyoğlu, and Fatih — are displaying photographs that belong to different addresses.

Fatih is particularly sensitive. The district contains dense concentrations of Ottoman-era heritage structures in areas like Zeyrek and Süleymaniye, where accurate photographic documentation is a prerequisite for restoration grant applications administered through the Cultural and Natural Heritage Preservation Boards. A mismatched image on a heritage parcel record can stall or invalidate a grant application entirely. Property owners and restoration contractors in Fatih were among the first to lodge formal complaints, according to the municipality's published complaint log, which recorded 312 submissions specifically citing image discrepancies between July 1 and July 3.

Beyoğlu's district municipality separately confirmed on Thursday that its own GIS team had identified 2,200 affected parcels within its boundaries and had already corrected approximately 800 of them by end of business that day. Beyoğlu covers İstiklal Caddesi and the Galata neighbourhood, where several ongoing Bosphorus-view development projects have planning records under active review — meaning the errors carry real commercial stakes, not just administrative inconvenience.

What Residents and Property Owners Should Do Now

The İBB's technical directorate has published a manual verification tool on the e-municipality portal at ibb.istanbul, allowing any resident to enter their parcel identification number and check whether the attached photograph matches their property's address metadata. The directorate's Wednesday notice stated that a full automated correction sweep is scheduled for completion by July 14, but residents involved in active planning applications, rental disputes, or renovation permits were advised not to wait for the automated fix.

For anyone whose property record is affected, the practical path is straightforward: download a timestamped screenshot of the erroneous record today — this preserves evidence of the system error — then submit a correction request through the district municipality's online help desk. Kadıköy and Üsküdar both confirmed to The Daily Istanbul via their published portal announcements this week that correction requests are being processed within 48 hours, prioritising parcels with active permit or grant applications.

The broader lesson lands at an inopportune moment for Istanbul's digital governance ambitions. The city has roughly 1.4 million registered urban parcels, and even a 1 percent error rate touches tens of thousands of property owners. With earthquake-resilience disclosure rules expanding later this year — requiring up-to-date structural photographs as part of formal risk assessments — the integrity of the image database is no longer a back-office technicality. It is a public-safety data question, and this week's scramble made that plain.