Canberra's Duplicate Image Problem: How the Capital Stacks Up Against Cities Tackling the Same Digital Headache

Canberra's major public institutions are sitting on digital archives bloated with duplicate images — redundant photographs, scanned documents stored two, three, sometimes a dozen times across different servers — and the cost of managing that redundancy is drawing quiet but serious attention from records managers across the ACT public service.

The issue has sharpened in mid-2026 for a specific reason: the ACT Government's Digital Records Transition Program, which has been rolling government agencies onto a consolidated cloud storage framework since late 2024, is now surfacing just how deep the problem runs. When agencies migrate, duplicate detection tools are flagging vast proportions of image libraries as redundant copies. The financial and administrative case for cleaning house has never been clearer — nor has the gap between Canberra's approach and what comparable capital cities are doing elsewhere.

What the Numbers Look Like

Industry analysts who work with government archives estimate that between 30 and 40 per cent of images held in typical public-sector digital repositories are duplicates or near-duplicates — a figure that translates into significant storage costs at enterprise cloud rates, which in Australia currently run from roughly $23 to $40 per terabyte per month depending on the provider and redundancy tier. For large institutions like the National Archives of Australia on Queen Victoria Terrace, or the National Library of Australia on Parkes Place, even modest reductions in storage load carry budget consequences worth tracking.

The Australian National University's Digital Humanities Hub in Acton has been piloting perceptual hashing tools — software that identifies visually identical or near-identical images even when file names and metadata differ — as part of its own internal digitisation projects. The university declined to release specific figures from those trials before publication, but the program has been referenced in procurement notices published on the AusTender database this year.

Wellington, New Zealand — a compact capital with a comparable public-service-heavy workforce — moved earlier. Archives New Zealand implemented a system-wide duplicate image policy in 2023 that required agencies to run deduplication audits before any new cloud migration could be approved. The result, documented in the New Zealand Government's 2024-25 Digital Investment Report, was a measurable reduction in total government cloud storage consumption. Amsterdam's Stadsarchief, the city's municipal archive, took a different route, investing in open-source duplicate detection integrated directly into its ingest pipeline so duplicates are caught before they enter the archive at all — prevention rather than cure.

Canberra's Particular Challenge

The ACT's situation is complicated by the dual-layer nature of government here. Federal agencies and ACT Government bodies often hold overlapping photographic records — images of the same Gungahlin construction projects, the same Belconnen town centre redevelopments, the same light rail corridor along Flemington Road — filed separately under different retention schedules and different information management systems. That structural duplication is harder to resolve than simple accidental copies, because legal and administrative obligations attach to both sets of records independently.

The ACT Government's Chief Digital Officer directorate has flagged image deduplication as a priority workstream for the 2026-27 financial year, though a formal policy instrument has not yet been gazetted. Public servants working in records management roles at several Civic-based agencies describe the current environment as one where the tools to solve the problem are well understood — perceptual hashing, content-aware fingerprinting, machine-learning classifiers — but where the governance frameworks for deciding which copy to keep and which to discard lag behind the technology.

For Canberrans employed in the public service — which accounts for a substantial share of the workforce in suburbs from Woden to Tuggeranong — the practical upshot may eventually be felt through faster internal systems and lower agency IT overhead. Those savings, modest as they sound, compete for attention against larger line items. But records managers argue the cleanup compounds: every year of inaction adds more duplicates to a backlog that only grows harder to unwind. Wellington started that work three years ago. Amsterdam started it earlier. Canberra, at this point, is still building the policy scaffolding to begin.