Sydney's Duplicate Image Problem: How the City Stacks Up Against London, Singapore and New York

Sydney's major public institutions are sitting on digital asset libraries riddled with duplicate images — the same photograph stored dozens of times under different file names, burning through server budgets and slowing down the archivists, designers and communications staff who rely on those systems every day. The City of Sydney Council, which manages one of the largest municipal digital archives in the country, began a formal audit of its media asset management systems in late 2025, a move driven partly by infrastructure costs and partly by the ballooning demands of its Metro West communications work along the Parramatta Road corridor.

The timing matters. Sydney's institutions are not alone, but the scale of the problem here is shaped by local conditions: rapid population growth across Western Sydney, an explosion in council-produced content since COVID, and years of underfunded IT teams inheriting legacy storage from merged councils. The Greater Sydney Commission, for example, absorbed digital collections from multiple former planning bodies when it was restructured, leaving an archive that, by any reasonable assessment, contains significant redundancy. How cities choose to clean this up — automatically, manually, or not at all — has real financial and operational consequences.

What Other Cities Are Doing

London's 33 borough councils have taken divergent approaches. Tower Hamlets and Camden have both deployed AI-assisted deduplication tools through their content management vendor contracts since 2023, with Camden publicly reporting that the process reduced its active image library by roughly 40 per cent within 12 months. Singapore's government, through its Smart Nation Digital Government Office, has integrated deduplication protocols into its whole-of-government asset management framework — a top-down approach that Sydney's more federated council structure makes difficult to replicate directly. New York City's Department of Citywide Administrative Services rolled out a centralised digital asset platform across agencies in 2022 that baked in hash-based duplicate detection from the start.

Sydney, by contrast, has no single coordinating body for digital asset management across its 33 councils. Each local government area — from Woollahra Municipal Council in the east to Penrith City Council in the Blue Mountains foothills — makes its own procurement decisions. The result is a patchwork. Some councils use enterprise platforms with built-in deduplication; others still store images on shared drives organised by year and department name, a system that guarantees duplication over time.

The Local Cost and the Practical Fix

Cloud storage is not cheap at scale. AWS S3 Standard storage in the Sydney region costs around AUD $0.025 per gigabyte per month — a figure that compounds quickly when an organisation stores the same 20-megabyte RAW photograph 50 times across different project folders. For a mid-sized organisation producing several thousand images a year, that redundancy can represent thousands of dollars in avoidable annual storage costs, before counting the staff hours spent searching for the right version of an image.

The State Library of New South Wales on Macquarie Street has been working through its own digital housekeeping as part of a broader collections digitisation push. The library holds more than five million photographs, and its digital preservation team has been applying perceptual hashing — a technique that identifies visually near-identical images even when file metadata differs — to flag duplicates before they enter its long-term preservation store. That kind of upstream filtering is now considered best practice globally, according to published guidance from the International Federation of Library Associations.

For organisations that have not yet started, the practical advice from asset management specialists is consistent: don't wait for a full platform migration to begin deduplication. Free tools such as dupeGuru can clear obvious duplicates from smaller collections immediately, while enterprise tools from vendors including Bynder and Canto offer automated workflows for larger libraries. The City of Sydney Council's audit is expected to produce a public procurement brief later this year, which could provide a useful template for smaller councils across Greater Sydney looking for a lower-cost path to the same outcome. Whether that brief leads to any coordinated regional approach will depend, in no small part, on whether the NSW Government decides this is a problem worth funding from the centre — or leaves 33 councils to solve it 33 separate ways.