Melbourne tackles duplicate images in civic databases better than peers

Melbourne's City Council confirmed this week that its digital asset management systems contain more than 340,000 duplicate image files spread across municipal planning, heritage, and public works databases — a backlog that has grown significantly since the 2020 shift to remote-working workflows accelerated uploads from dozens of separate departments. The duplication problem is not unique to Melbourne, but the way the city chooses to resolve it is shaping up as a case study for mid-sized global cities facing the same digital clutter.

The timing matters. Victoria's housing density reform agenda — which requires rapid processing of planning applications across inner suburbs from Fitzroy to Footscray — depends on clean, retrievable site imagery. When surveyors and planners pull duplicate or mislabelled photos of a site on Nicholson Street or a heritage row in Carlton, decisions slow down. The Andrews-era digital transition that brought council records online was not accompanied by rigorous deduplication protocols, and the backlog has compounded annually since 2021.

What Melbourne Is Actually Doing

The Victorian government's Digital Victoria unit, operating out of offices on Collins Street in the CBD, has been piloting a perceptual hashing tool since February 2026 — software that compares image fingerprints rather than file names, catching duplicates that differ only in resolution or minor compression. The pilot is running across the Department of Transport and Planning's asset library, which holds site photos tied to more than 18,000 active planning permits. A separate program run by the Public Record Office Victoria, based in North Melbourne, is applying similar tools to the state's heritage image archive, which spans records from the 1880s through to last year.

Melbourne City Council's own internal review, tabled at the April 2026 Council meeting, identified duplication rates of roughly 23 percent across its corporate image libraries. That figure is consistent with what the UK's Local Government Association reported for English councils in 2024 — a benchmark that Melbourne planners have been quietly using as a comparison point.

How Rival Cities Are Handling It

London's 33 borough councils began a coordinated deduplication push in late 2024 under the Greater London Authority's Digital Infrastructure Program, targeting their combined planning image stock of roughly 2.1 million files. Amsterdam's city archive — the Stadsarchief — completed a full deduplication of its digitised municipal photo collection in March 2025 after a three-year project, reducing storage load by 31 percent and cutting retrieval times for heritage assessors by roughly half, according to the archive's published project report. Toronto, which restructured its planning image databases following a 2023 auditor-general recommendation, now requires mandatory deduplication checks before any new image batch is uploaded to its central civic repository.

Melbourne is behind Amsterdam and Toronto on the implementation curve but slightly ahead of most comparable Australian capitals. Brisbane City Council has no public-facing deduplication program as of July 2026. Sydney's Department of Planning has acknowledged the issue internally but has not released a remediation timeline.

The cost dimension is real. Cloud storage for unrationalised municipal image libraries carries ongoing licensing and retrieval costs that grow with volume. The Public Record Office Victoria's North Melbourne project is budgeted at $1.4 million across two financial years, with completion targeted for June 2027. That figure, confirmed in the 2025–26 Victorian Budget Papers, covers software licensing, staff retraining, and external technical audit.

For residents and businesses dealing with Melbourne's planning system, the practical upshot is straightforward: expect faster permit processing in precincts where the Digital Victoria pilot has already run — that currently covers the inner north, including Brunswick and Coburg — while outer suburbs remain in the unrationalised backlog. Property developers lodging applications in areas like Sunshine or Werribee should continue to supply their own high-resolution site imagery with submissions, rather than relying on council-held photos that may be outdated or duplicated. The council's planning portal flags known imagery gaps by suburb, and that list was last updated on June 18, 2026.