Wollongong's Duplicate Image Problem: How the Steel City Stacks Up Against Global Peers

Wollongong City Council is working through a backlog of duplicate cadastral and heritage images embedded in its digital planning portal — a technical housekeeping problem that sounds trivial until you learn it is delaying development applications and costing hours of staff time every week. The council's property information system, which feeds into the NSW Planning Portal, currently holds an estimated several thousand duplicate image files tied to individual land parcels, according to the council's own digital services review tabled earlier this year.

The timing matters. Wollongong is processing more development applications than at almost any point in the past decade, driven by the state government's housing supply push and the industrial transition around Port Kembla. Duplicate image records slow assessments because planning officers must manually verify which image is authoritative before issuing certificates or approvals. In a city where the median house price in the Illawarra region crossed $850,000 in 2025, according to CoreLogic data, delays that add even a few weeks to a DA cycle carry real financial weight for developers and first-home buyers alike.

What Other Cities Are Doing

The problem is not unique to Wollongong. Newcastle, which shares many of Wollongong's industrial-heritage characteristics and is similarly digitising its planning records, began a dedicated deduplication program through its information management unit in 2024. Hamilton in New Zealand — another mid-sized city with a comparable population of around 180,000 — completed a two-year digitisation and deduplication project across its district plan imagery in March 2026, reducing its image library by roughly 34 percent and cutting DA processing times for straightforward residential applications. Wollongong sits in a similar population band at around 220,000 people, making Hamilton a reasonable benchmark.

Further afield, Malmö in Sweden — a post-industrial port city of about 350,000 people that is frequently cited in green-industrial transition literature alongside Wollongong — automated its duplicate detection using open-source tools integrated into its GIS platform. The Malmö project, completed in late 2023, reportedly reduced manual image review time by around 60 percent for planning staff. Wollongong's digital services team has flagged a similar automation pathway in internal documentation, though no formal procurement process has been announced publicly as of July 2026.

Locally, two institutions are central to whatever solution eventually emerges. The University of Wollongong's SMART Infrastructure Facility on Northfields Avenue has existing research partnerships with the council on spatial data projects, and has the technical capacity to assist with image classification workflows. Wollongong City Libraries, which manages the digitised historical collection including heritage streetscape photographs from Crown Street and the Flagstaff Hill precinct, faces an adjacent but distinct version of the problem — duplicate scans of the same physical document created during multiple digitisation rounds over the past fifteen years.

What Comes Next for Wollongong

The council's digital services team is understood to be preparing a report for the August 2026 ordinary meeting that will outline options ranging from a manual remediation program to a partly automated solution. A manual approach, based on comparable council projects in regional NSW, typically costs between $80,000 and $150,000 in staff time and contractor fees depending on the size of the affected dataset. An automated approach carries higher upfront software integration costs but significantly lower ongoing maintenance.

For residents and developers with active applications, the practical advice is straightforward: when lodging documents through the NSW Planning Portal for a Wollongong address, ensure image files are named with the lot and deposited plan number in the filename itself. Council planning staff have informally indicated this single step reduces the likelihood of a submission being flagged for manual image verification. The Wollongong Development Advice Centre on Burelli Street can provide guidance on document formatting before formal lodgement.

The broader point is that Wollongong is neither ahead of nor dramatically behind comparable cities on this issue. Hamilton and Malmö finished their clean-ups first. Newcastle is mid-stream. Wollongong is at the decision point — which means the next council meeting cycle will likely determine whether the city closes that gap quickly or lets the backlog compound through another construction boom.