Wollongong's Duplicate Image Problem: The Key Decisions That Will Shape What Comes Next

Wollongong City Council is facing a decision point over how it handles thousands of duplicate images sitting across its digital planning and heritage documentation systems — a problem that has quietly grown alongside the region's accelerating development activity and now threatens to slow assessment timelines for projects from Port Kembla to Fairy Meadow.

The issue matters now because the Illawarra is mid-cycle on several major infrastructure and rezoning programs. The Port Kembla Renewable Energy Zone precinct, BlueScope Steel's green steel transition documentation, and the expanded Illawarra Shoalhaven Regional Development Fund all generate large volumes of site photography, environmental imagery and cadastral records that feed directly into council and state agency planning portals. When duplicate images accumulate in those systems — sometimes filed under different property identifiers, sometimes re-uploaded after system migrations — assessors end up working from inconsistent visual records, which can delay determinations or, worse, produce decisions based on outdated site conditions.

What the backlog looks like on the ground

The duplication problem is concentrated in two areas: the Wollongong Local Environment Plan mapping database, which covers properties from Thirroul in the north to Shellharbour in the south, and the Illawarra heritage register, which includes more than 600 individually listed items across the local government area. Council's geographic information systems team has been working through a remediation process since at least early 2025, but sources familiar with the program say the volume of duplicate records escalated after a 2024 software platform upgrade that migrated image libraries without deduplication protocols in place.

The University of Wollongong's SMART Infrastructure Facility on Northfields Avenue has been involved in discussions about automated image-matching tools that could accelerate the clean-up. The facility has existing expertise in spatial data management and has previously worked with council on smart city pilot programs along Crown Street. Whether a formal contract emerges from those conversations is one of the key decisions still ahead.

On the heritage side, the Wollongong City Library's Local Studies collection — held at the Burelli Street branch — holds a parallel archive that overlaps with council's digital register in ways that are not always reconciled. Librarians there have flagged instances where the same heritage building photograph appears under three separate catalogue entries, a problem that compounds when external researchers or planning consultants pull imagery for development applications.

The decisions that will define the next chapter

Three choices are now in front of council and its partner agencies. First, whether to invest in automated deduplication software — commercial tools currently used by NSW Land Registry Services run in the range of $80,000 to $150,000 for initial licensing, depending on database scale. Second, whether to bring in a specialist data governance contractor or rely on existing GIS staff to manually review flagged records. Third, and most consequential, whether to pause new heritage image uploads to the public portal while the clean-up proceeds, or keep the portal open and risk further duplication.

Each option carries a timeline implication. A manual review of the estimated 4,200 flagged duplicate records across both the planning and heritage databases — a figure drawn from a council information governance report tabled at a committee meeting in March 2026 — would take an internal team roughly 14 months at current resourcing. An automated tool, if procured and deployed by September 2026, could theoretically complete the same work in six to eight weeks.

For residents and businesses with active development applications in suburbs like Keiraville, Coniston and Corrimal, the practical upshot is straightforward: any application that relies on site imagery attached to a property record flagged for duplication review may see its assessment clock pause while the relevant images are verified. Council's development assessment team has said applicants should contact the duty planner at the Burelli Street civic centre to check whether their property is in the affected cohort.

The broader lesson from the Wollongong case is likely to resonate well beyond the Illawarra. As NSW pushes more planning functions onto digital platforms under the ePlanning portal framework, the quality of underlying image data becomes load-bearing infrastructure. Getting the remediation architecture right — and making the call on automation versus manual review before the next major system migration — is the work that starts now.