Delhi's Duplicate Image Problem: How the Capital Compares to London, Seoul and São Paulo

Delhi's municipal and government agencies are sitting on a sprawling mess of duplicate imagery — tens of thousands of repeated, mislabelled or outdated photographs spread across public land records, the Delhi Development Authority's property portal, and the Delhi Metro Rail Corporation's infrastructure documentation system. The problem is not cosmetic. Duplicate images embedded in official records have delayed property title verifications in areas including Rohini and Dwarka, where homebuyers have reported processing holdups at district sub-registrar offices stretching into weeks.

The issue has sharpened in 2026 because Delhi is mid-way through a broader push to digitise civic infrastructure ahead of Phase 4 Metro expansion, which is scheduled to bring new corridors through Janakpuri West and RK Ashram by late 2026. When project documentation contains duplicate or conflicting site photographs, tender review committees cannot easily reconcile field conditions against submitted bids — a technical bottleneck that procurement officials at the DMRC have acknowledged in internal review cycles, though no public statement has been issued.

What Other Cities Have Done

The comparison with peer cities is uncomfortable for Delhi. Seoul's Smart City operations centre, run under the Seoul Digital Foundation, deployed an AI-powered deduplication layer across its urban infrastructure image database in 2023, reducing redundant files by an estimated 60 percent within 18 months, according to the foundation's published annual report. London's Ordnance Survey, working alongside the Greater London Authority, completed a similar audit of its digital asset library in phases between 2022 and 2024, tagging and retiring legacy duplicates that had accumulated over more than a decade of piecemeal digitisation. São Paulo's municipal data secretariat announced in March 2025 a contract with a local technology consortium to automate image hash-matching across the city's favela-regularisation land records — a politically sensitive undertaking given that property disputes in peripheral neighbourhoods carry significant legal weight.

Delhi has no equivalent centralised programme on record as of July 2026. The Delhi government's IT department operates the Delhi Integrated Multi-Modal Transit System portal and several e-governance platforms under the Delhi e-Governance Society, but none of these bodies has published a deduplication policy or a timeline for one. Requests submitted under the Right to Information Act to the Directorate of Information Technology regarding image data governance have, in several documented cases tracked by digital rights researchers at the Centre for Internet and Society in Bengaluru, returned responses categorising the matter as outside mandatory disclosure scope.

Ground-Level Consequences in Chandni Chowk and Beyond

In practical terms, the confusion surfaces most visibly in Old Delhi. Heritage documentation projects covering the walled city around Chandni Chowk — jointly managed by the Archaeological Survey of India and the Delhi Urban Heritage Foundation — have flagged that photographic archives held by different agencies contain duplicate images filed under different metadata tags, making cross-referencing for conservation grant applications error-prone. A single haveli on Kucha Ghasi Ram lane, for instance, may appear in three separate databases under different property identifiers but with photographically identical images carrying different timestamps.

The Yamuna riverfront redevelopment files, which became politically charged under both the AAP administration and the BJP-led central government's competing visions for the floodplain, have similar documentation tangles. Satellite and ground-level images of the same ghats have been logged multiple times across agencies including the Delhi Jal Board and the National Mission for Clean Ganga, with no shared deduplication standard between them.

For residents and small businesses, the cost is time. A property title search that should take three to five working days at the South Delhi District office in Saket can stretch to three weeks when registrars must manually reconcile image conflicts in the record chain. That delay translates directly into higher bridging loan costs for buyers — a real, measurable burden in a city where home loan interest rates have hovered around 8.5 to 9 percent through the first half of 2026.

What comes next depends on whether the Delhi e-Governance Society will incorporate image-data standards into the next iteration of its Digital Delhi roadmap, expected to be published before the end of the current financial year in March 2027. Until then, the practical advice for anyone dealing with official photographic records in Delhi — whether for property, heritage, or infrastructure purposes — is to file parallel applications with every agency that might hold a relevant copy, and budget for the wait.