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

South Australia's public sector is sitting on a storage crisis hiding in plain sight. Across state government agencies, universities and cultural institutions, duplicate digital images — identical or near-identical files saved multiple times across different servers — are consuming terabytes of paid cloud and on-premise storage. The SA Department for Industry, Innovation and Science, which oversees digital infrastructure for several Lot Fourteen precinct tenants, began an internal audit of its image asset libraries in February 2026, according to procurement records filed with the State Procurement Board.

The timing matters. Adelaide is mid-sprint through a once-in-a-generation infrastructure investment cycle. The AUKUS submarine program, the Olympic Dam expansion, and the hydrogen jobs plan have all generated enormous volumes of technical documentation, architectural renderings and site photography — imagery that gets emailed, re-uploaded, reformatted and saved again dozens of times before a project even breaks ground. Storage bills follow accordingly.

What Adelaide Is Actually Doing

The most concrete local response is happening at two institutions. The State Library of South Australia on North Terrace launched a deduplication project for its digitised photographic collection in late 2025, working through roughly 1.4 million scanned items that had accumulated across multiple digitisation rounds since 2008. Separately, the Australian Institute for Machine Learning, based at the University of Adelaide's Lot Fourteen campus on North Terrace, has been developing perceptual hashing tools — software that identifies near-duplicate images even when file names, resolutions or colour profiles differ — that were piloted internally before being offered to partner agencies earlier this year.

The City of Adelaide council has also flagged the issue. A council infrastructure committee agenda from May 2026 referenced duplicate asset files within the council's geographic information system layers, an artefact of successive contractors uploading base imagery without checking existing libraries. No dollar figure was attached to the problem in that document, but the committee requested a formal cost-benefit report by September 2026.

At the commercial level, several Adelaide-based firms in the Lot Fourteen precinct offer deduplication as part of broader digital asset management contracts. The going rate for a managed deduplication audit of a mid-sized government collection — roughly 500,000 to two million files — sits between $40,000 and $120,000 depending on scope, based on publicly listed service schedules from two SA-registered vendors active on the SA Tenders and Contracts portal as of June 2026.

How Adelaide Compares Globally

Rotterdam's municipal archive completed a city-wide image deduplication program in 2023 after discovering that approximately 34 percent of its 6.2 million digitised municipal photographs were exact or near-exact duplicates, a figure the city's own digital services team published in an open-data report. The process freed 18 terabytes of storage and cut annual cloud hosting costs by roughly €210,000. Singapore's National Heritage Board runs a continuous automated deduplication pipeline across its institution-wide collections, a model cited in a 2024 UNESCO report on digital heritage preservation. Denver, Colorado, adopted a similar automated approach across its city government in 2022 after a manual audit of just the planning department's image library found over 60,000 redundant files.

Adelaide is not yet running automated, continuous deduplication at a city-wide level. The work happening at the State Library and at Lot Fourteen is project-based and institution-specific rather than systemic. That gap is measurable: Rotterdam's program took 14 months from audit to implementation across all municipal agencies; Adelaide's council committee has set a September 2026 deadline for a report that hasn't been written yet, let alone acted on.

The practical gap between Adelaide and its peer cities is not primarily technical — the tools exist and local expertise is demonstrably present. It is procedural. No single agency has been designated to own the problem across the public sector, which means each institution is solving it independently, at its own pace and often with different software standards that complicate any future integration.

For institutions and businesses managing large image libraries in Adelaide right now, the AIML at Lot Fourteen has published open-source perceptual hashing tools on its public GitHub repository. The State Procurement Board's digital services panel, updated in March 2026, lists eight approved vendors offering deduplication and digital asset management services, giving agencies a pre-vetted procurement pathway that bypasses the need for individual tenders under $220,000. The tools and the contracts are there. The question is whether anyone coordinates their use before the storage bill makes the decision unavoidable.