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

WA government agencies managing public asset registries are facing a decision point over how to handle thousands of duplicate images embedded across planning, transport, and housing databases — a problem that has compounded steadily since the Metronet expansion began accelerating corridor documentation in 2023. The immediate question is not whether to act, but which path carries the least financial and operational risk heading into the 2026–27 budget cycle.

The issue matters now because several of these databases feed directly into public-facing services. The Department of Planning, Lands and Heritage maintains the State Planning Portal, which developers and private landholders in suburbs from Ellenbrook to Cockburn Central rely on for lot boundary images, heritage overlays, and zoning maps. When duplicate images sit unresolved in the backend, conflicting visual records can attach to the same cadastral parcel — creating paperwork delays that, in a housing market still absorbing significant demand pressure, translate directly into longer approval timelines.

Two Paths, Two Price Tags

The options on the table are broadly understood by those working in the records management sector: a human-led audit, which is slower but produces verified results, or an automated duplicate-detection pipeline using image-hashing and machine-learning tools, which is faster but requires validation before its outputs can be trusted in legal or planning contexts. Neither is cheap. Commercial duplicate-image management tools licensed at an enterprise level typically run in the range of $80,000 to $250,000 annually depending on database size, according to published pricing from vendors active in the Australian government procurement market.

For WA, the stakes are amplified by the AUKUS-related infrastructure documentation underway at HMAS Stirling on Garden Island, south of Rockingham. Defence facility records — including aerial imagery, site photographs, and engineering diagrams — are subject to strict data sovereignty requirements under the Security of Critical Infrastructure Act 2018. Any automated system touching those image sets would require explicit vetting under the federal government's guidelines, adding a layer of procurement complexity that a straightforward manual review does not trigger. The Department of Defence has not publicly commented on the specific image-management arrangements at Stirling.

The Main Roads WA asset documentation system presents a different but related challenge. Road corridor photography captured during the Metronet construction phases along the Morley–Ellenbrook Line and the Yanchep Rail Extension has generated large volumes of timestamped site images, many of which were uploaded in duplicate batches during rapid contractor handovers. Main Roads WA's annual report for 2024–25 noted the agency manages more than 18,700 kilometres of roads and associated infrastructure, a scale that makes manual image auditing across all asset classes impractical without significant dedicated resourcing.

What Happens in the Months Ahead

The decisions landing on agency desktops this July will likely set a two-to-three year precedent. If WA's Department of Finance moves to include duplicate-image remediation as an approved category under the whole-of-government Microsoft Azure and AWS cloud agreements — both of which are live for WA agencies — it would open a procurement fast lane for automated tools. That call is expected to align with the next Digital Strategy review, which the WA Government has signalled will be updated before the end of 2026.

For private-sector operators in Perth's planning and property ecosystem, the practical advice is straightforward: document your own image submissions carefully. Firms lodging development applications through the MRA's Waterfront precinct in Elizabeth Quay or through the City of Stirling's online portal should retain original-resolution copies with metadata intact. If an agency comes back querying duplicate attachments in an existing application, responding quickly with clearly labelled replacement files reduces the risk of the application stalling while a backend audit resolves conflicting records.

The broader lesson from how other jurisdictions have handled this — New South Wales ran a targeted spatial data audit following the 2022 flood mapping disputes — is that the cost of inaction compounds. The agencies that moved early on structured data hygiene avoided the scramble. Perth's planning and infrastructure bodies now have a narrow window to get ahead of the same curve.