Adelaide's Duplicate Image Problem: How the City Stacks Up Against Rotterdam, Montréal and Singapore

Adelaide's cultural and government institutions are quietly grappling with a problem that has quietly ballooned across every major city running large digital asset libraries: duplicate images clogging databases, inflating storage costs, and undermining the reliability of public-facing platforms. The issue has moved from an IT footnote to a genuine civic priority in 2026, as several South Australian government agencies undertake digital asset audits linked to broader technology modernisation programs.

The timing matters. With Lot Fourteen, the North Terrace tech and space precinct, positioning itself as a showcase for cutting-edge digital infrastructure, the state government has a reputational stake in how its own agencies manage basic data hygiene. Duplicate imagery — whether in heritage archive systems, planning portals, or tourism databases — erodes trust in the very digital backbone that the precinct is meant to demonstrate Adelaide can build.

What Adelaide Is Actually Doing

The State Records of South Australia, based in Gepps Cross, is understood to be running a deduplication review across its digitised photographic holdings, which span more than a century of civic life. Separately, the South Australian Tourism Commission has been updating its digital asset management system following a wider rebrand cycle that began in late 2024. Neither project has been publicly announced as a standalone initiative, but both appear in procurement notices published on the SA Government's buy.sa.gov.au portal from the first quarter of 2026.

At Lot Fourteen itself, the Australian Space Agency — which has its headquarters on the site — has flagged digital asset standardisation as part of its broader data governance framework, relevant because multiple partner organisations share imagery libraries for public communications. The precinct now hosts more than 30 resident organisations, each maintaining separate content pipelines that frequently draw on overlapping visual material.

The City of Adelaide council, which maintains photographic records tied to development applications and heritage registers in the CBD and North Adelaide, has not publicly detailed a specific deduplication program. However, council tender documents from March 2026 reference a content management system upgrade for the planning portal, which typically includes deduplication tooling as a standard component.

How Other Cities Are Handling It

Rotterdam's municipal archive completed a machine-learning assisted deduplication of its 1.4 million-image historical collection in 2025, cutting storage requirements by roughly 23 percent according to figures published by the city's own digital services department. Montréal's Bibliothèque et Archives nationales du Québec adopted a similar approach for its Mémoire du Québec digitisation project, using perceptual hashing — a technique that detects near-identical images even when file names or metadata differ — across approximately 800,000 scanned items.

Singapore's National Heritage Board went further, integrating deduplication directly into the ingest workflow so duplicates are flagged before they enter the archive, not after. That approach, described in the board's 2025 annual report, reduced post-processing remediation work by an estimated 40 percent. Each of those cities had a single coordinating body with both the budget and the mandate to enforce standards across institutions. Adelaide, like many mid-sized cities, has neither in any consolidated form — its cultural institutions, from the Art Gallery of South Australia on North Terrace to History Trust of South Australia sites across the metro area, operate largely autonomous digital programs.

The practical consequence is duplication not just within institutions but between them. The same photograph of Victoria Square or the Adelaide Oval can exist in dozens of slightly different versions across half a dozen government and cultural servers simultaneously.

The clearest near-term opportunity lies with the Digital Local Government program, a federally co-funded initiative that South Australian councils can access through the Department for Infrastructure and Transport. Councils that apply before the next funding round — expected to open in early 2027 — can nominate digital asset management as an eligible project category. For institutions at Lot Fourteen, the more immediate lever is the shared services model already being piloted for other IT functions, which could, if extended, provide a single deduplication layer across multiple resident organisations. The work is unglamorous. But in a city staking its future on digital credibility, getting the basics right first is not optional.