Adelaide's Duplicate Image Problem: How the City Stacks Up Against Global Peers

Adelaide's public institutions are sitting on millions of duplicate digital images across council servers, state government databases and cultural archives — and the bill for storing redundant files is quietly climbing. The State Library of South Australia, which holds digitised collections spanning Rundle Mall's retail history back to the 1950s, confirmed earlier this year it was reviewing its digital asset management framework, a process that brought the duplicate image problem into sharper focus for administrators across the city.

The timing matters. South Australia's tech sector is expanding fast, anchored by the Lot Fourteen precinct on North Terrace, which houses the Australian Space Agency, Stone & Chalk, and dozens of defence and data firms. As those organisations pump more imagery — satellite photos, engineering renders, marketing assets — into shared and government-adjacent systems, the cost of storage redundancy compounds. Globally, enterprises waste an estimated 30 percent of cloud storage on duplicate or near-duplicate files, according to research published by Gartner in 2024. Adelaide's public sector is not immune.

What Other Cities Are Doing

Amsterdam and Singapore are the benchmark cases. The City of Amsterdam embedded automated deduplication protocols across its municipal image libraries in 2023, reducing storage overhead by roughly 22 percent within 12 months, according to a case study published by the Netherlands' Digital Government programme. Singapore's Government Technology Agency, GovTech, went further — deploying AI-assisted hashing tools across 14 ministries in late 2023 to flag identical and near-identical images before they entered long-term archival storage.

Adelaide has no equivalent citywide programme yet. The Adelaide City Council's digital records team operates under the state's State Records Act 1997, which mandates retention policies but does not specifically address duplicate file elimination as a cost-saving measure. At Lot Fourteen, individual tenants manage their own asset libraries, meaning there is no centralised deduplication layer across the precinct's roughly 50-plus resident organisations.

Sydney and Melbourne are marginally ahead. The City of Melbourne rolled out a deduplication audit across its internal systems in 2025 as part of a broader cloud migration to Microsoft Azure, identifying more than 400,000 redundant image files in a single department. Adelaide's comparable council infrastructure audit, last publicly reported in the 2024-25 annual report, did not specifically address duplicate image volumes.

The Local Cost Equation

Cloud storage is not free. Standard enterprise-grade AWS S3 storage in the ap-southeast-2 region — the Sydney zone used by most South Australian government entities — costs approximately $0.025 per gigabyte per month as of mid-2026. For an institution holding even 10 terabytes of duplicated image data, that translates to roughly $3,000 a year in pure storage waste, before factoring in staff time spent managing bloated catalogues.

The History Trust of South Australia, which manages the South Australian Museum and Migration Museum on Kintore Avenue, has been digitising physical collections for over a decade. That scale of digitisation — photographs, maps, artefact images — creates fertile ground for duplicate files, particularly when multiple staff members scan the same item independently or ingest images from external donors without cross-referencing existing holdings.

TAFE SA's digital media courses, delivered across the Regency Park and City campuses, now include modules on digital asset management, a signal that the industry recognises the workforce gap. But curriculum and institutional practice are different things, and the gap between what students learn and what government archives actually do remains wide.

For Adelaide to catch Amsterdam or Singapore, the most practical short-term step is a citywide audit framework — something the state's Department for Digital Trade and Innovation, based at Lot Fourteen, is positioned to lead. Several local govtech firms already operating out of the precinct offer commercial deduplication tools built on perceptual hashing, a technique that catches near-identical images that byte-level comparison misses. A coordinated procurement approach, rather than institution-by-institution purchasing, would reduce cost and create consistent standards across agencies. Without that coordination, the duplicate files will keep accumulating — and so will the invoices.