Canberra's Digital Archives Are Drowning in Duplicate Images — and the Numbers Explain Why

ACT government agencies and local institutions are sitting on enormous volumes of duplicate image files — redundant copies that are consuming server storage, distorting digital record counts, and costing real money. Across Commonwealth and Territory departments clustered along Constitution Avenue and Edinburgh Avenue in Barton, IT managers have begun treating duplicate image replacement as a line item problem, not a housekeeping afterthought.

The timing matters. The ACT government is mid-way through a broader digital transformation agenda that includes overhauling records management systems across agencies. With cloud migration contracts under active procurement, every gigabyte of redundant data carries a direct dollar cost. Storage that was once a flat on-premise expense is now billed incrementally, and duplicates that were once invisible inefficiencies have become auditable waste.

What the Numbers Actually Show

Industry benchmarks from digital asset management research consistently place the share of duplicate or near-duplicate image files in large organisations at between 20 and 30 percent of total image libraries — and public sector collections, which accumulate files across ministerial cycles and staff turnover, tend to sit at the higher end of that range. For an agency storing 10 terabytes of image assets, that can translate to 2 to 3 terabytes of recoverable space, with cloud storage for government-grade environments in Australia priced at rates that make the annual cost of that redundancy measurable in tens of thousands of dollars.

The Australian National University's digital collections team in Acton has publicly acknowledged the challenge of image deduplication in archival workflows, and the University of Canberra library at Bruce has run internal audits on its digital asset holdings as part of routine systems maintenance. Both institutions deal with the compound problem of images ingested multiple times across different database migrations — a structural issue rather than a human error one.

Canberra's public service workforce compounds the problem in a specific way. Staff turnover in Commonwealth departments — particularly in areas like the Department of Finance and Services Australia, both with significant Woden and city-centre footprints — means image libraries get duplicated during onboarding handovers, shared drive restructures, and the routine copying of assets between project folders. A single campaign image might exist in four or five locations across a shared network before anyone checks.

Replacing Duplicates: What the Cleanup Process Looks Like

Deduplication tools use perceptual hashing — an algorithmic process that generates a fingerprint for each image based on visual content rather than file name or metadata. Two files with different names, different compression rates, and different file sizes can still be flagged as functional duplicates if their visual fingerprints match within a defined threshold. Enterprise platforms used by government agencies typically allow administrators to set that threshold, distinguishing between exact copies and near-duplicates like resized or slightly re-exported versions of the same original.

The ACT's Digital Strategy, updated in 2024, identifies storage rationalisation as a cost-efficiency target across Territory-owned systems. Duplicate image replacement — replacing scattered redundant copies with a single canonical file linked from a central repository — is one of the cleaner technical fixes available, because it improves retrieval speed, reduces backup times, and cuts the risk of different versions of the same image being used inconsistently in public-facing materials.

For Canberra organisations starting this process, the practical sequence is consistent: run a deduplication audit to establish the actual scale of duplication, agree on a canonical file standard (resolution, format, naming convention), migrate links and references to the canonical copy, then archive or delete redundant files under a documented retention policy. The ACT Government's Shared Services ICT unit, based in Macarthur House on Wattle Street, provides guidance on records management obligations that govern how files can be deleted rather than just moved.

Organisations that defer the work face a compounding problem. Every new cloud migration, every new content management system deployment, carries duplicates forward. The storage bill grows. The audit becomes harder. Starting the count now, before the next infrastructure refresh, is the straightforward part of an otherwise unglamorous task.