Duplicate Image Replacement: What Officials, Experts and Key Figures Are Saying

Duplicate image files are quietly clogging the digital infrastructure of local governments, cultural institutions and housing agencies across the Illawarra — and the people responsible for managing those systems are starting to talk openly about what it costs to ignore the problem.

The issue is sharp right now because several major Wollongong-based organisations are mid-way through significant digital transformation projects. Wollongong City Council's ongoing review of its asset management systems, the University of Wollongong's expanded digitisation work across its Innovation Campus on Squires Way, and Port Kembla's renewable energy zone documentation effort have all surfaced the same underlying headache: redundant image files that slow searches, inflate storage costs and create version-control confusion for staff and contractors alike.

Why the Problem Is Growing

Digital archiving has accelerated sharply since 2022, when the NSW Government pushed councils and regional bodies to move planning documents, heritage records and development applications into cloud-based repositories. For the Illawarra Shoalhaven region, that transition brought a surge in scanned photographs, site inspection imagery and engineering diagrams — much of it uploaded multiple times by different departments without a shared naming convention or deduplication protocol in place.

Experts in digital asset management point to a core technical distinction that organisations often miss: a duplicate image is not the same as a near-duplicate. Exact duplicates share identical file hashes and can be removed automatically with off-the-shelf software. Near-duplicates — the same photograph saved at different resolutions, or cropped slightly differently for different publications — require human review or more sophisticated perceptual hashing tools. Getting that distinction wrong can mean deleting the only high-resolution version of an irreplaceable heritage photograph.

For institutions like the Illawarra Historical Society, which holds photographic records going back to the late 19th century and operates out of its Burelli Street premises in the Wollongong CBD, that distinction is not academic. The society has been digitising its collection in stages, and committee members have raised concerns at public forums about the risk of automated cleanup tools being applied without proper archival oversight. No specific incident has been cited publicly, but the concern reflects a wider caution among heritage bodies nationally.

Practical Steps Institutions Are Taking

Wollongong City Council confirmed in its 2025–26 operational plan that digital records management forms part of its broader information governance review, though specific budget figures for that work have not been publicly itemised. The University of Wollongong, through its Information Management Office, has previously noted that its digital asset library spans multiple faculties and research centres, creating cross-departmental duplication risks that require policy-level responses rather than purely technical fixes.

BlueScope Steel, whose Port Kembla steelworks sits at the centre of the region's green steel transition, maintains extensive engineering and environmental image records tied to its compliance and safety obligations. A deduplication failure in that context carries regulatory risk, not just storage inefficiency. Industry observers note that as BlueScope moves through its decarbonisation investment program — publicly pegged at over $1 billion across its Australian operations — the volume of photographic and technical documentation being generated will only increase.

The practical advice from digital asset specialists broadly converges on four steps: audit existing holdings before any cleanup begins; establish a shared metadata taxonomy so new uploads are tagged consistently from the start; apply automated deduplication only to files confirmed as exact matches via hash comparison; and route near-duplicate decisions through a human review workflow with a clear sign-off trail. For organisations managing publicly funded records, that audit trail matters for accountability as much as for efficiency.

For Wollongong institutions planning digital asset reviews in the second half of 2026, the State Records NSW guidelines — updated in late 2024 — provide the governing framework for what can be deleted, consolidated or archived. Organisations unsure of their obligations can contact State Records NSW directly or work through the Local Government NSW information management network, which runs periodic workshops for council staff across regional NSW.