The Numbers Behind Bendigo's Duplicate Image Problem: How Digital Archives Are Drowning in Redundant Files

Bendigo's public institutions are sitting on tens of thousands of duplicate digital images, redundant files that waste storage, slow retrieval systems and cost ratepayers money every year they go unaddressed. The scale of the problem has come into sharper focus this year as several major local organisations move to audit and replace duplicated content across their digital asset libraries.

The timing matters. Federal digital storage infrastructure grants under the National Cultural Heritage Digitisation Program have a July 31, 2026 application deadline, meaning institutions that can demonstrate a clear deduplication strategy stand to access Commonwealth co-funding. For Bendigo, that window is weeks away.

What the Data Actually Shows

Across comparable regional Victorian councils and health networks, duplicate image rates inside unmanaged digital asset management systems typically run between 18 and 34 percent of total file libraries, according to published benchmarking by the Australian Digital Alliance. For an institution holding 200,000 images — a realistic figure for an organisation like Bendigo Health, which has been expanding its capital footprint on Lucan Street since the $630 million redevelopment program was announced — that translates to potentially 36,000 to 68,000 redundant files consuming server capacity and staff time.

Bendigo Health's digital records operation is one of three local bodies understood to be reviewing image asset governance this financial year, alongside the City of Greater Bendigo and the Bendigo Art Gallery on View Street. The Gallery, which holds one of regional Victoria's most significant permanent collections, has been digitising works since at least 2018 as part of broader accessibility upgrades. Duplicate scans created during multi-phase digitisation projects are a known byproduct of that work.

Storage costs are not trivial. Commercial cloud storage for institutional-grade image archives runs at roughly $23 to $47 per terabyte per month depending on redundancy tiers and access frequency, based on current Australian pricing from major providers. A library carrying 30 percent unnecessary duplicates is, in practical terms, burning somewhere between a quarter and a third of its storage budget on files that serve no purpose.

The Local Clean-Up Challenge

La Trobe University's Bendigo campus on Edwards Road has a direct stake in this conversation. The campus library supports research collections that interface with regional archives, and library technology staff there have previously participated in state-level working groups on digital preservation standards. Deduplication methodology — deciding which version of an image is the canonical one before deletion — is not a simple algorithmic task. Metadata quality, file provenance and institutional copyright records all feed into the decision, and getting it wrong can mean permanently discarding the higher-resolution or better-attributed version of a historically significant image.

The City of Greater Bendigo, which maintains photographic records stretching back through decades of urban development across precincts from Golden Square to Kangaroo Flat, faces this exact challenge. Municipal photo libraries grow organically, with images ingested from multiple departments, contractors and community contributors over years. Without a systematic deduplication pass, the same photograph of, say, a Pall Mall streetscape can exist in six slightly different file sizes under three different file names, spread across two servers.

Aboriginal cultural heritage imagery adds another layer of complexity. Under Victorian law and the Aboriginal Cultural Heritage Act, some images require community consultation before any deletion decision is made, regardless of whether they appear technically duplicated. The Dja Dja Wurrung Clans Aboriginal Corporation, which holds recognised rights across much of the greater Bendigo region, has previously engaged with local institutions on protocols for managing sensitive digital material.

Institutions approaching the July 31 grant deadline should, according to published Australian Digital Alliance guidance, be able to document their current total image asset count, the estimated duplicate rate, the deduplication tool or methodology they intend to use, and a post-clean-up storage projection. Those four data points form the core of a credible funding application. Organisations that have not yet conducted even a sample audit of their image libraries have roughly three weeks to run one before the window closes.