Delhi's Duplicate Image Problem: What Officials, Experts and Key Figures Are Saying

Digital records managers at the Delhi government's e-District portal flagged a systemic problem earlier this year: thousands of duplicate images — scanned identity documents, property photographs, and civic infrastructure records — had accumulated across multiple departments, slowing processing times and, in some cases, causing administrative errors that affected real residents. The issue, long treated as a technical footnote, is now drawing attention from senior officials and archivists alike.

The timing matters. Delhi is mid-way through a large-scale digitisation push tied to the Phase 4 expansion of the Delhi Metro, which requires updated land records, utility maps, and right-of-way documentation across corridors including the Janakpuri West–R.K. Ashram Marg line and the Tughlakabad extension. When duplicate images sit undetected in the same database, project engineers and civic planners can pull contradictory records for the same plot of land — a problem that compounds the already fraught politics around land acquisition in areas like Rohini and Dwarka.

What the Experts Are Saying

Archivists at the Delhi State Archives, located on Shamnath Marg near Civil Lines, have been grappling with the duplicate image question for longer than most. The institution holds physical and digitised records stretching back to the colonial era, and staff there have described the challenge as partly technological and partly procedural — departments upload files without standardised naming conventions or hash-verification checks, meaning two near-identical scans of the same document can live in separate folders with no automated flag.

The National Informatics Centre, which manages much of the technical backbone of Delhi's e-governance infrastructure, has in recent months piloted a deduplication protocol in two municipal zones — Karol Bagh and Shahdara — using perceptual hashing to identify visually similar images across datasets. Technology policy observers familiar with the pilot note that the approach, while not new globally, represents a meaningful step for a city whose data infrastructure grew piecemeal across multiple agencies over two decades.

The problem extends beyond municipal records. The Archaeological Survey of India, whose Delhi Circle office oversees heritage sites from Qutb Minar to Humayun's Tomb, has separately acknowledged that its photographic archive — used by researchers, conservation specialists, and planners navigating Old Delhi's development tensions — contains layers of duplicate imagery accumulated from multiple survey seasons. Researchers working at the Indira Gandhi National Centre for the Arts in Janpath have pointed out that duplicate or mislabelled heritage images can distort restoration priorities when used as reference material.

The Political and Practical Stakes

In Delhi's charged political environment, the issue carries weight beyond the technical. Yamuna riverbank records, for instance, are bound up in the long-running and deeply contested cleanup project — a policy battleground between the AAP-led state government and central agencies under the Union Ministry of Environment. If photographic evidence used in compliance assessments contains duplicates or substitutions, it muddies accountability for both sides.

The Delhi Urban Shelter Improvement Board, which manages relocation records for residents displaced from unauthorised colonies and riverbed settlements, processes tens of thousands of photographic submissions annually. A 2025 internal review — details of which have circulated among housing policy researchers — reportedly found a non-trivial proportion of submitted residential photographs that triggered duplicate-detection flags, raising questions about both data entry standards and verification workflows. The Board has not made the findings public.

For ordinary Delhiites, the consequences are mundane but real. Residents in Lajpat Nagar and Patparganj have reported delays in property mutation requests at district offices when submitted photographs matched records already in the system under different applicant names — an outcome that typically requires manual review and adds weeks to processing times.

The next step, according to civic technology circles, is a city-wide deduplication audit that the Delhi government is expected to announce before the end of the current financial year — March 2027 at the latest. Whether departments will cooperate across jurisdictional lines, given the history of friction between state and central bodies over data sovereignty, is the question that administrators and outside observers are watching most closely.