Wollongong's Duplicate Image Problem: What Happens Next and the Key Decisions Ahead

Wollongong City Council's digital asset library has accumulated hundreds of duplicate images across its public-facing planning portals, development application databases and tourism promotion platforms — a problem that administrators acknowledged internally earlier this year and that is now forcing a decision about how the city manages its visual records going forward.

The timing matters. The Illawarra is midway through a development surge that is generating more official imagery, aerial photography and infrastructure documentation than at any previous point in the region's history. BlueScope Steel's green steel transition at Port Kembla, the Illawarra Shoalhaven Regional Development Fund's infrastructure pipeline, and a string of Crown Street Mall precinct redevelopments are all producing high-volume photographic records that must be accurately catalogued, cross-referenced and stored. Getting the system wrong now means the problem compounds for years.

Where the Duplication Is Biting Hardest

The most visible friction points are in the development application system managed through the NSW Planning Portal, which Wollongong City Council uses alongside its own supplementary databases. When duplicate images are uploaded against multiple DA reference numbers — a common occurrence when a single site on, say, Burelli Street or along the Keira Street corridor generates multiple sequential applications — staff must manually reconcile records before assessments can proceed. That takes time, and in a planning office already stretched by elevated lodgement volumes, the delays add up.

The University of Wollongong's campus expansion documentation, lodged through 2024 and 2025 for the North Wollongong foreshore precinct, exposed the same issue at an institutional scale. Facilities teams working with council's records found overlapping aerial survey images filed under different reference tags, requiring a reconciliation process that took several weeks to resolve. No decisions were reversed as a result, but the episode illustrated how a technical problem becomes an administrative bottleneck when the stakes are high.

The Wollongong Art Gallery on Kembla Street faces a related challenge on the cultural side. The gallery's digitisation program, which has been running since 2022, flagged in its most recent internal review that roughly 12 percent of its digitised collection entries carried at least one duplicate image file, creating confusion for provenance records and loan documentation. Resolving those entries is now part of the gallery's 2026-27 operational workload.

The Fork in the Road

Decision-makers have two broad paths available. The first is remediation: a targeted audit that identifies and removes existing duplicates, followed by tighter upload protocols enforced manually by staff. This is cheaper upfront and can begin immediately, but it does not prevent the problem from recurring as data volumes grow. Industry estimates for manual deduplication projects of comparable scale in Australian local government contexts typically run between $40,000 and $120,000 depending on database size and the number of legacy records involved.

The second option is a platform-level fix: adopting a digital asset management system with automated hash-based deduplication built in, meaning the software flags or rejects identical image files at the point of upload rather than allowing them to enter the database at all. Several NSW councils have moved in this direction since 2023, and the NSW Government's own Digital.NSW unit has published guidance recommending automated deduplication as a baseline standard for agencies managing more than 50,000 digital assets.

For Wollongong, the volume threshold that triggers the stronger case for automation is approaching fast. The Port Kembla Renewable Energy Zone alone is expected to generate thousands of survey, compliance and progress images over the next three years as infrastructure construction advances.

The practical next step is a scoping exercise — one that maps current database size, identifies the heaviest-duplication areas, and prices both remediation and platform options against projected data growth through to 2030. Council's IT procurement calendar typically runs decisions of this kind through the August budget review cycle, meaning the window to commission a scoping study and return a recommendation to the relevant committee is roughly the next six to eight weeks. Miss that window, and the decision likely defers to mid-2027 — by which time the backlog will be considerably larger.