Melbourne's Digital Archives Race to Fix a Duplicate Image Crisis That's Been Growing for Years

The problem has a mundane name — duplicate image replacement — but the scale of it rattling through Melbourne's public institutions this week is anything but routine. A coordinated push across several Victorian government-linked bodies to audit and replace duplicate digital images in public-facing databases has surfaced a backlog that, in some collections, sees the same photograph catalogued dozens of times under different file names, burning through storage budgets and making records nearly unsearchable.

The timing matters. Victoria's public sector has been mid-transition since late 2024 toward centralised cloud storage platforms, a shift that has forced archivists and records managers to actually look at what they have — and what they have, in many cases, is a mess. The State Library Victoria on La Trobe Street and the City of Melbourne's own digital collections unit, based out of the Council House offices on Little Collins Street, are both understood to be running active deduplication projects this quarter, though neither has yet published findings publicly.

How Bad Is the Duplication Problem?

Industry benchmarks give a rough sense of the scale. Research published by the Digital Preservation Coalition — a UK-headquartered body with Australian institutional members including several Victorian universities — has found that in unmanaged digital archives, duplicate files can account for between 20 and 40 percent of total stored data. For a mid-sized municipal archive holding tens of terabytes, that translates directly into wasted licensing and storage costs running into tens of thousands of dollars annually.

At the State Library Victoria, the Pictures Collection alone holds more than 800,000 digitised items. Archivists working on the collection have for years flagged that batch digitisation projects — particularly those done in the 2010s when funding was plentiful and quality control less rigorous — produced significant numbers of near-duplicate files: slightly different scans of the same photograph, or the same image ingested twice from separate donor collections. Resolving those duplicates requires human review, not just automated matching software, because two images that look identical to an algorithm may carry different provenance metadata that matters for researchers.

The City of Melbourne's situation is more recent. Its digital transformation program, accelerated under a council resolution from March 2025, has pushed heritage photographs, planning documents and event records into a new asset management system. The migration surfaced duplication rates that council IT staff are still quantifying. A tender document published on the Victorian Government tenders platform in May 2026 sought specialist data migration and deduplication services for a Melbourne metropolitan council — though the document did not name the council directly — with a contract value range of $180,000 to $240,000.

What Institutions Are Doing About It

The practical response this week has involved both technology and policy. Museums Victoria, which manages digitised collections across the Melbourne Museum in Carlton and Scienceworks in Spotswood, confirmed in its 2025–26 annual operational update that it was running deduplication passes across its Collections Online portal. The portal, which gives the public free access to more than a million catalogue records, had accumulated duplicate image entries partly because of a 2022 platform migration that failed to fully reconcile legacy identifiers.

For smaller organisations — neighbourhood historical societies, migrant community archives, local arts bodies — the challenge is more acute because they lack dedicated IT staff. The Public Record Office Victoria, headquartered in North Melbourne, runs a Community Archives grants program that this year included a specific funding stream for digital remediation work, with grants of up to $15,000 available. Applications for the current round closed in June, but a second intake is expected in October 2026.

For anyone managing a community collection or even a business image library in Melbourne, the practical takeaway from this week's activity is straightforward: run a deduplication audit before any platform migration, not after. The cost of cleaning up duplicates inside a new system is substantially higher than doing it in the old one. Tools including open-source software such as dupeGuru, as well as commercial options used by larger institutions, can flag candidates for review — but a human still has to make the final call on what gets deleted and what gets kept.