How Delhi's Government Archives Ended Up Flooded With Duplicate Images — And Why It Took Years to Notice

Delhi's public record-keeping system is carrying tens of thousands of duplicate digital images across at least four municipal departments, a problem that traces back to a poorly coordinated digitisation drive that began in earnest around 2019 and accelerated through the pandemic years. The duplication affects land title documents, property tax records, building plan approvals, and heritage zone photographs stored under the Delhi Urban Shelter Improvement Board and the Municipal Corporation of Delhi.

The issue matters now because Phase 4 of the Delhi Metro expansion — running through corridors including Janakpuri West to Krishna Park Extension and Tughlakabad — requires clean, non-duplicated imagery in land acquisition files. Property disputes along the RK Puram and Munirka stretches have already been flagged by legal teams because the same scanned boundary map appeared under different file reference numbers, creating contradictory ownership trails in documents submitted to the Delhi High Court.

How the Duplication Crisis Built Up

The root cause is straightforward: different agencies scanned the same physical documents independently, with no shared deduplication protocol. The Delhi Secretariat's own IT wing, operating out of offices near ITO, ran one scanning programme. The MCD ran a parallel one from its Civic Centre headquarters on Minto Road. The Delhi Development Authority operated a third digitisation effort tied to its Master Plan 2041 preparation work. None of the three systems talked to each other in any meaningful automated way before 2023.

Procurement records available through RTI filings show the city spent money on at least two separate document management software platforms between 2019 and 2022 without requiring interoperability as a contractual condition. Vendors delivered functional systems within their own boundaries. What they did not deliver was a unified image registry. By the time the DDA's Master Plan team began cross-referencing files in late 2024, internal assessments reportedly found duplication rates in certain heritage zone folders — including the Shahjahanabad conservation area around Chandni Chowk — running well above 30 percent of stored assets.

The Shahjahanabad Redevelopment Corporation, which oversees heritage documentation for Old Delhi, has been particularly exposed. The area's layered history means thousands of images of the same havelis, mosques, and stepwells exist across separate institutional databases, scanned at different resolutions on different dates with different metadata tags. Without a standardised image hash or fingerprinting system applied at the point of upload, identifying duplicates required manual review — something no department had the staffing to perform at scale.

What Needs to Happen Now

The technical fix is not complicated. Image deduplication using perceptual hashing — a standard tool in digital asset management — can flag near-identical files even when they differ slightly in compression or colour profile. Several state governments, including those in Telangana and Tamil Nadu, applied similar tools to their land records systems between 2021 and 2024. Delhi has the digital infrastructure to do the same. The question has always been coordination between agencies that historically guarded their data silos.

The AAP administration and the BJP-controlled Central government have clashed repeatedly over jurisdictional control of Delhi's administrative machinery, and that political friction has slowed unified IT governance decisions. A proposal circulated within the Delhi government's Department of Information Technology in early 2025 called for a single consolidated image repository with mandatory deduplication at upload, but the proposal had not moved to a budgetary approval stage as of the last public budget session in February 2026.

For residents with pending property cases or heritage objections — particularly those in areas like Nizamuddin, Mehrauli, and Lajpat Nagar where redevelopment pressure is intense — the practical advice is to request that any document submitted on their behalf carries a unique file reference number traceable to a single source scan, and to challenge filings where the same image appears under multiple reference codes. The Delhi High Court has legal aid desks at Sewa Nagar that can assist. Until the city resolves the backend architecture problem, document hygiene at the point of submission remains the only reliable check.