Brisbane's Duplicate Image Problem: How the City Stacks Up Against Amsterdam, Singapore and Toronto

Brisbane City Council's digital asset library now holds more than 2.3 million photographs, a figure that has roughly doubled since 2020 as infrastructure documentation for the 2032 Games accelerated across South East Queensland. A significant portion of those files are duplicates — identical or near-identical images stored across multiple servers — costing ratepayers real money in storage contracts and slowing down the architects, planners and communications teams who need to find a single usable shot of, say, the Kangaroo Point Green Bridge or the Roma Street Parklands.

The problem matters now for a specific reason: the SEQ population surge driven by migration from New South Wales and Victoria has pushed councils in Logan, Ipswich and Redland Bay to rapidly expand their own digital infrastructure programs. Every new project — a road corridor in Springfield, a community centre in Crestmead — generates fresh photography, drone footage and planning renders. Without systematic deduplication, those assets pile up in siloed repositories that nobody can search efficiently.

What Brisbane Is Actually Doing

The State Library of Queensland on Stanley Place has been running a deduplication pilot since late 2024, using perceptual hashing software to flag visually similar images across its digitised collection, which spans historical photographs dating back to the 1850s. The library has not published outcomes from that pilot publicly, but the program is referenced in its 2025–26 strategic services plan as an active workstream under digital preservation.

Queensland State Archives, based at Runcorn, faces a parallel challenge with government photography submitted under the Public Records Act 2002. Archivists there process submissions from more than 180 state agencies, and duplicated imagery from agencies documenting the same infrastructure sites — particularly around the Gabba precinct and the Cross River Rail corridor — has been identified internally as a workflow bottleneck, according to the agency's publicly available annual report for 2024–25.

Brisbane-based digital asset management firm Tonic Media Network, which holds contracts with several local government bodies in the SEQ region, began offering automated deduplication as a standard feature of its DAM platform in January 2025, pricing the add-on at approximately $4,200 per year for mid-size local government clients. That price point is lower than comparable enterprise solutions from international vendors, which typically start around $12,000 annually for equivalent throughput.

How Amsterdam, Singapore and Toronto Compare

Amsterdam's municipal archive, Stadsarchief Amsterdam, completed a full deduplication sweep of its 750,000-image digital collection in 2023, using open-source tooling built on the Python-based imagehash library. The project cut the archive's active storage footprint by 18 percent, according to a case study published by the International Council on Archives in March 2024.

Singapore's National Archives completed a broader exercise in 2022 that incorporated video alongside still images, working across the National Heritage Board's unified collections platform. The effort was tied directly to Singapore's Smart Nation initiative and was publicly scoped at SGD 3.1 million across two financial years.

Toronto is arguably the closest comparison to Brisbane's situation. The City of Toronto's open-data photography archive, maintained through its Corporate Information Management unit, ballooned rapidly during the Scarborough subway extension documentation phase between 2021 and 2024. Toronto responded by mandating perceptual hash checks at the point of upload, a policy change introduced in the city's Digital Asset Lifecycle Policy update of September 2023. Brisbane has no equivalent upload-gate policy yet.

That gap is where Brisbane's risk sits. Amsterdam, Singapore and Toronto all moved earlier precisely because they tied deduplication to a large-scale infrastructure moment — and started building the policy framework before the photography volume peaked, not after. Brisbane is still in the build phase, with the Athletes Village site at Northshore Hamilton and the aquatics centre at Spring Hill generating thousands of new images each month.

For Brisbane residents and ratepayers, the practical upshot is straightforward: councils and state agencies that do not act in the next 12 to 18 months will likely spend considerably more on retrospective cleanup than they would on preventive tooling today. The Queensland Audit Office flagged digital records management as an area of ongoing concern in its most recent whole-of-government information and communication technology report. Organisations managing Olympic-related assets would do well to treat that finding as a deadline, not a footnote.