Delhi's Duplicate Image Problem: The Key Decisions That Will Shape the City's Digital Heritage

Delhi's public digital archives contain tens of thousands of duplicate images — some mislabelled, some repeated across multiple government portals, and many so degraded by repeated compression that they no longer serve the purposes they were uploaded for. The question now is who will clean up the backlog, and whether the institutions responsible have the budget or the will to do it properly.

The issue has quietly grown for years, but it has arrived with new urgency in 2026. The Delhi Metro Rail Corporation's Phase 4 expansion has added pressure on heritage documentation teams, who are racing to photograph and archive neighbourhoods in North-West Delhi before construction permanently alters them. When duplicate or low-resolution images are catalogued instead of originals, the record is lost. There is no going back.

Where the Problem Lives — and Why It Has Gotten Worse

The Archaeological Survey of India's Delhi circle, which maintains records for sites from Qutub Minar in Mehrauli to Humayun's Tomb in Nizamuddin East, has long relied on a patchwork of scanning drives and volunteer digitisation projects. Several of those drives, run over the past decade, produced duplicate sets that were never reconciled. The Indira Gandhi National Centre for the Arts on Janpath, which holds one of the city's largest photographic collections, has its own cataloguing system that does not talk to the ASI database.

The Delhi Urban Heritage Foundation, a non-governmental body that has worked extensively in Shahjahanabad — the walled city around Chandni Chowk — flagged the problem formally in a 2024 audit. The audit noted that a single structural photograph of the Fatehpuri Mosque appeared in at least eleven separate government-linked repositories under six different captions. That kind of duplication is not merely untidy. It skews search results, wastes server storage, and makes it genuinely difficult for researchers, journalists, and planners to know which image is authoritative.

The scale matters here. India's National Mission on Cultural Mapping, launched under the Union Ministry of Culture, had aimed to digitise records for more than six lakh cultural assets nationwide by March 2025. Whether that deadline was met — and in what condition those records exist — has not been confirmed publicly by the ministry. What is clear is that Delhi, as the national capital with the country's densest concentration of protected monuments, represents a disproportionate share of the backlog.

The Decisions Ahead — and the Politics Around Them

Three choices now sit on the table. First, the ASI and the IGNCA could agree on a shared de-duplication protocol, using software that flags pixel-level matches and routes them to a human reviewer. That costs money — estimates for a city-wide exercise run into several crore rupees — and requires both bodies to subordinate their individual systems to a common standard. Neither has shown much appetite for that kind of institutional compromise in the past.

Second, the AAP government at the Delhi Secretariat could push its own digitisation agenda through the Delhi Tourism and Transportation Development Corporation, which already manages some photographic assets tied to heritage tourism in areas like Lodi Garden and Purana Qila. The DTTDC has a smaller footprint than the central bodies, but it is more responsive to directions from the Chief Minister's office.

Third — and most likely if nothing is decided — the duplication problem grows alongside the Phase 4 Metro corridor documentation, compounds itself through the ongoing Yamuna riverfront development photography, and eventually becomes someone else's crisis to inherit.

The immediate practical step, according to archival practice followed by comparable institutions in London and Tokyo, is a freeze on new uploads to contested repositories until an audit is complete. That kind of pause requires political cover. Without a clear directive from either the Union Ministry of Culture or the Delhi government before the next financial quarter ends in September 2026, institutions will keep uploading, keep duplicating, and keep losing the very images they set out to preserve.