Canberra's Duplicate Image Problem: What Happens Next and the Key Decisions Ahead

The ACT Government's digital records infrastructure is carrying thousands of duplicate images across agency databases, a problem that auditors and archivists have flagged as a growing liability for public sector efficiency and long-term data integrity. The Territory Records Office, based in Canberra's civic precinct, is now facing pressure to resolve the backlog before a planned migration to a unified cloud storage platform, expected to begin in late 2026.

The issue is not unique to Canberra, but it lands with particular weight here. The federal capital's workforce is disproportionately dependent on government databases — from planning approvals in Gungahlin to social services records in Belconnen — and duplicated image files inflate storage costs, slow retrieval times, and complicate Freedom of Information requests. With the ACT budget already under strain from Light Rail Stage 2 commitments, every unnecessary terabyte of stored data has a dollar figure attached to it.

What the Backlog Looks Like on the Ground

The duplication problem stems from years of siloed agency workflows. When the ACT Government began digitalising paper records from the 1990s onward, individual directorates — Transport Canberra, ACT Health, the Environment, Planning and Sustainable Development Directorate — ran their own scanning programs, often without cross-referencing a central repository. The result is a patchwork of overlapping image files that now sit across multiple servers, some hosted on-site at Callam Offices in Woden, others in data centres contracted to external providers.

Australian National University's School of Computing has been engaged by at least one ACT directorate to assess deduplication software options, according to procurement notices published on the ACT Government's tenders portal. The university's involvement signals that the Territory is looking at algorithmic solutions rather than manual review — a sensible approach given the volume, but one that introduces its own risks around misidentification of genuinely distinct records that happen to look similar.

The University of Canberra's digital humanities team has separately published research indicating that government image archives in mid-sized jurisdictions typically carry a duplication rate of between 18 and 34 per cent — a range that, applied to the ACT's holdings, would represent a substantial proportion of total storage capacity. Those figures are drawn from UC's 2025 Digital Governance in Australian Territories working paper, and ACT officials have not publicly confirmed where the Territory's own rate sits.

The Decisions That Cannot Be Delayed

Three choices will define what happens next. First, the Territory Records Office must settle on a deduplication methodology — hash-based matching, perceptual hashing, or a hybrid — before any data migration begins. Getting this wrong means either deleting records that should be kept or carrying the same bloat into the new cloud environment. The deadline is tight: the migration contract, awarded to a Canberra-based ICT firm under a whole-of-government panel arrangement, has a go-live target of March 2027.

Second, agencies need to agree on a governance model for the merged archive. Tuggeranong-based community service providers and Northbourne Avenue directorates alike submit records into the system, and without clear ownership rules, the deduplication effort risks recreating the same fragmentation within eighteen months. The ACT Government's Digital Strategy 2025–2030, released last year, nominates unified data custodianship as a priority but does not specify enforcement mechanisms.

Third, there is the question of public access. The Territory Records Office currently allows citizens to request digitised images of historical planning and land records through its Birrigai Street reading room in Mitchell. If duplicates have been incorrectly tagged as primary records, some of those public-facing lookups may be returning the wrong version of a document. A quality-assurance audit of the public-access portal is now considered essential before the migration proceeds.

The window for getting this right is short. Agencies that have already begun pre-migration clean-up work will need to pause and align with whatever central methodology the Territory Records Office endorses. The ACT Government has not yet announced a public consultation process or a ministerial statement on the deduplication framework. Advocates for government transparency, including those who regularly use the ACT's FOI system, will be watching the next budget update in August for any signal that resources have been allocated to the task.