Delhi's Duplicate Image Problem: How the Capital Stacks Up Against Mumbai, London and Seoul

Delhi's land and property digitisation drive has hit a stubborn bottleneck. Tens of thousands of scanned documents held by the Delhi Development Authority and the Municipal Corporation of Delhi contain duplicate, mislabelled or low-resolution images — errors that are delaying property mutations, heritage listings and infrastructure clearances across the capital. The problem has become acute as Delhi Metro Phase 4 corridor work pushes right-of-way paperwork through already strained government portals.

The timing matters. The central government's Digital India Land Records Modernisation Programme set a deadline of March 2026 for all states and union territories to complete first-phase digitisation of revenue records. Delhi, which administers land through a patchwork of the DDA, MCD and the Delhi government's Revenue Department, missed the full-compliance target. A significant share of the outstanding errors trace back to duplicate image files — the same plot scanned twice under different khasra numbers, or a single image file linked to multiple survey entries in the online portal.

Where Delhi Falls Behind — and Why

Walk into the Revenue Department's Tis Hazari office on any working morning and you will find clerks manually cross-checking printouts against screen records, a process that consumes hours per case. The MCD's centralised property tax portal, launched in its current form in 2022, logs duplicate image complaints from ward offices in Shahdara, Rohini and South Delhi on a near-daily basis, according to ward-level processing logs that are publicly available under Right to Information filings.

Compare that with Mumbai, where the Maharashtra government's integrated iSarita 2.0 platform — operational since late 2023 — uses automated hash-matching to flag duplicate scans before they enter the master database. The system reduced duplicate-entry complaints in Mumbai's registration offices by a figure the Maharashtra Revenue Department cited in its 2024-25 annual report as exceeding 60 percent in the first year. Seoul's city administration went further, deploying an AI-assisted image-deduplication layer across its urban planning document archive in 2022; the Seoul Metropolitan Government reported clearing a backlog of roughly 1.1 million flagged files within eight months.

London's Land Registry, which handles a comparable volume of urban property records to Delhi's combined agencies, moved to a cloud-based duplicate-detection workflow in 2021. By 2023 the registry was processing same-day corrections on duplicate title documents — something that currently takes Delhi's Revenue Department between 45 and 90 working days by its own published service standards.

What Delhi's Agencies Are Actually Doing

The DDA has not been entirely static. Its in-house IT division piloted a deduplication script on the Dwarka sub-city property archive in early 2025, targeting roughly 80,000 records in Sectors 10 through 23. The pilot reportedly cleared several thousand duplicate image entries, though the DDA has not published outcome data publicly as of this article's filing date. The MCD's Smart City cell, operating out of its Civic Centre headquarters on Minto Road, has been in procurement talks with two software vendors for an automated document-management system since at least January 2026 — a process that heritage advocacy groups in Shahjahanabad have said is moving too slowly given ongoing demolition-order disputes in Old Delhi where incorrect plot images have contributed to legal challenges.

The AAP government at the Delhi Secretariat and the BJP-administered central ministries overseeing the DDA operate parallel systems that do not yet share a live data feed, a structural problem that has no immediate resolution on the calendar. Each agency runs its own scanning vendor contracts, making unified deduplication protocols difficult to mandate without central coordination.

Property owners and legal practitioners dealing with Yamuna floodplain demarcation disputes — a politically charged category of records given the Yamuna cleanup politics of recent years — have been hit disproportionately hard. Lawyers at the Saket District Court complex have noted that contested plot files frequently arrive for hearings missing supporting images or carrying images from entirely different survey areas.

For residents dealing with the problem now, the Revenue Department's own portal allows a formal grievance under the category "Document Image Error" with a stated response window of 30 working days. Filing through the Delhi e-District portal at edistrict.delhigovt.nic.in and attaching a copy of the original khasra or property card remains the fastest documented route to a correction — faster, in practice, than visiting a sub-divisional magistrate office in person. The MCD, separately, accepts image correction requests through its 311 app, which logs the complaint with a timestamped ticket that can be tracked online.