Adelaide's Digital Housekeeping Problem: How the City Stacks Up Against Rotterdam, Medellín and Taipei on Duplicate Image Sprawl

Adelaide's public sector is sitting on a growing problem nobody much wants to talk about. Across local councils, the State Library of South Australia on North Terrace, and the cluster of tech startups housed at Lot Fourteen, digital asset managers are grappling with duplicate image files that clog storage systems, inflate cloud costs, and make public records harder to search and verify. It is not glamorous work. But the cities getting it right are pulling ahead.

The issue has sharpened this year because South Australian government agencies are mid-rollout on several large digitisation programs — including archival efforts tied to the Olympic Dam expansion environmental documentation and visual asset libraries supporting the hydrogen jobs plan communications campaigns. Each project generates thousands of image files. Without automated deduplication built into the workflow from day one, the backlog compounds fast.

What Other Cities Are Actually Doing

Rotterdam's municipal archive, Stadsarchief Rotterdam, completed a system-wide deduplication audit in early 2025, cutting its image repository by roughly 34 percent through a combination of perceptual hashing software and a mandatory metadata standard applied to all new uploads from January 1, 2025. Medellín, Colombia — a city that has invested heavily in smart city infrastructure since the mid-2010s — embedded duplicate-detection tools directly into its citizen services portal, reducing the image processing load on government servers by a reported margin that allowed the city to defer a planned storage infrastructure upgrade by two years. Taipei's Digital Affairs Ministry, established in 2022, mandated hash-based deduplication across all ministry-level image repositories as part of its open-government data standards by mid-2024.

Adelaide has no equivalent city-wide mandate. The Department for Industry, Science and Resources has guidelines on digital asset management, but they are not prescriptive about deduplication methodology. Lot Fourteen tenants — which include the Australian Space Agency headquarters and SmartSat CRC — each manage their own image libraries under their own IT arrangements. The result is inconsistent practice within a single precinct on North Terrace, less than 500 metres from Parliament House.

The Local Cost of Inaction

Cloud storage is not free. Amazon Web Services S3 standard storage, the tier most commonly used by South Australian government-adjacent organisations for non-sensitive image assets, is priced at approximately USD $0.023 per gigabyte per month as of mid-2026. A mid-sized cultural institution holding 10 terabytes of image files — not unusual for a body like the Art Gallery of South Australia on North Terrace — could be paying for several terabytes of exact or near-exact duplicates without knowing it. At scale across dozens of state agencies, the redundant spend adds up to a budget line worth auditing.

The City of Adelaide council's digital services team has been working since late 2024 on an internal review of its asset management platform, according to publicly available council meeting agenda documents. That review was expected to report by the first quarter of 2026. No public findings have been released as of July 4, 2026.

Smaller councils in the metropolitan area — including the City of Unley and the City of Burnside — have not publicly addressed the question at all. Neither has the Renewal SA agency, which holds an extensive library of development site imagery across projects stretching from Bowden to Aldinga.

The practical path forward for Adelaide institutions is not complicated, just unglamorous. Perceptual hashing tools — software that generates a fingerprint for each image and flags near-identical versions — are open-source and widely available. The Python library ImageHash, for instance, is free and in active use by archivists in Rotterdam and at several Taiwanese universities. The barrier is not technology. It is governance: who mandates the standard, who funds the audit, and who owns the outcome. Until South Australia's Chief Digital Officer sets a binding requirement — as Taipei did in 2024 — Adelaide will keep spending money storing the same photograph of a solar panel or a submarine component three or four times over, in four different folders, labelled differently, forever.