Bendigo Council Moves to Fix Duplicate Image Problem Plaguing Heritage Database This Week

The City of Greater Bendigo has launched an emergency review of its online heritage image database after staff identified this week that significant portions of the collection contain duplicate photographic records — in some cases, the same image filed under three or four separate catalogue entries. The problem, which administrators say has built up over at least a decade of ad hoc digitisation, is now being treated as a priority fix ahead of a platform migration scheduled for later this year.

The timing matters. Bendigo's heritage image library underpins research at La Trobe University's Bendigo campus on Bendigo Road, supports public interpretation panels at the Bendigo Art Gallery on View Street, and feeds into the Aboriginal Cultural Heritage Unit's work documenting Dja Dja Wurrung country. Any migration carrying duplicated records into a new system would compound errors, distort search results, and potentially mislabel culturally sensitive material — an outcome administrators are keen to avoid.

How the Problem Accumulated

The duplication issue traces back to at least three separate digitisation rounds: an initial scanning project in the early 2010s, a second pass linked to the 2014 Bendigo Art Gallery expansion, and a pandemic-era volunteer digitisation push in 2020 and 2021 when staff worked remotely and quality-control checks were reduced. Each round ingested images without a robust deduplication step. The result is a catalogue where, for example, photographs of the Shamrock Hotel on Pall Mall appear under variant titles, different date fields, and inconsistent copyright notations.

Duplicate digital records are not a trivial administrative nuisance. When a researcher at the Bendigo campus queries the database for images of, say, goldfields-era Ironbark or the Chinese joss house on Finn Street, inflated result counts distort what is actually held in the collection. More critically, if two duplicate entries carry different descriptive metadata, one version may be correctly attributed to a Dja Dja Wurrung source while the other is not — creating real risk of improper public reproduction of material that carries cultural restrictions.

Nationally, the problem is not unique to Bendigo. The Australian Institute for the Conservation of Cultural Material flagged in its 2024 sector survey that roughly 40 percent of regional council digital collections had no formal duplicate-detection protocol in place. Bendigo's situation reflects a pattern common across Victorian regional centres that scaled digitisation quickly without the accompanying data governance infrastructure.

What the Remediation Looks Like

This week's audit, conducted internally by the council's library and information services team based at the Bendigo Library on Hargreaves Street, is using a combination of automated hash-matching software and manual review. Hash-matching can catch pixel-identical copies instantly; the harder work is identifying near-duplicates — the same photograph scanned at different resolutions, or cropped differently across the digitisation rounds.

The council has not yet engaged an external contractor for the work, but the platform migration — to a new collections management system — is currently pencilled in for the fourth quarter of 2026. That gives the team roughly three to four months to resolve the backlog before any dirty data is carried across. Bendigo Health's recent capital expansion project, which produced a parallel archive of construction and community engagement photographs, has also been flagged as a secondary collection needing the same deduplication treatment before it is formally handed to the library service.

For residents and researchers using the heritage database right now, the practical advice is straightforward: treat search result counts as unreliable until the audit is complete. If you are relying on the collection for a specific project — a heritage overlay submission to the council's planning department, for instance, or research connected to the Dja Dja Wurrung Clans Aboriginal Corporation's cultural mapping work — cross-check any image you intend to use against the physical archive held at the Bendigo Library's local history collection before citing or reproducing it. The physical catalogue remains the authoritative record while the digital remediation continues.

The council's library service has indicated it will publish a progress report on the audit by the end of July 2026, at which point a cleaner figure on the total number of duplicate records should be available.