By the Numbers: Perth's Duplicate Image Problem Is Costing Councils and Contractors More Than Anyone Admits

Perth's local governments and state agencies are sitting on an estimated sprawl of redundant digital image files — duplicated photos, scanned documents and asset records stored two, three, sometimes four times across disconnected systems — and the bill for storing and managing that clutter is growing every financial year. The problem sits at the unglamorous intersection of the WA government's accelerating digital infrastructure push and a decade of fragmented data practices that nobody formally audited until recently.

The timing matters. WA's Metronet program alone has generated tens of thousands of construction-phase photographs since the Morley-Ellenbrook and Thornlie-Cockburn lines entered active build phases, with images uploaded separately to project management platforms, contractor portals, Department of Transport records and, in some cases, individual site engineer drives. Multiply that across 72 metropolitan local governments, the Water Corporation, Western Power and the dozens of contractors feeding into AUKUS-related base works at Stirling Naval Base in Garden Island, and the data volume is substantial.

What the Numbers Actually Show

Storage costs in enterprise cloud environments — the kind used by WA government agencies — typically run between $0.02 and $0.05 per gigabyte per month under standard tier-two arrangements, according to publicly available pricing from providers including Microsoft Azure and Amazon Web Services. A single high-resolution construction photograph taken on a modern site camera sits at roughly 8 to 12 megabytes. If a Metronet station build generates 50,000 such images, and 30 percent are duplicates — a figure consistent with industry benchmarks published by data governance bodies — that is 15,000 redundant files per station adding unnecessary load to every backup cycle, every compliance export and every freedom-of-information response.

The City of Perth and the City of Stirling, both of which maintain digital asset management systems covering planning approvals, public realm photography and event documentation, have been among the metro councils that shifted to centralised digital asset platforms in the past three years. Neither council has published a specific figure on the proportion of duplicate imagery identified during migration — that kind of internal audit data rarely surfaces publicly — but the process of deduplication is standard practice during any platform transition and carries real labour costs. IT migration projects in Australian local government have historically run 15 to 25 percent over initial estimates, according to the Australian Local Government Association's digital capability surveys.

The state government's broader digital transformation agenda, anchored in the Department of the Premier and Cabinet's Digital Strategy for WA, commits agencies to reducing data redundancy as part of efficiency targets. But the strategy sets directional goals rather than binding storage-reduction benchmarks, leaving individual agencies to determine their own deduplication timelines.

Where the Fix Starts — and What It Costs

Deduplication software licences for enterprise environments typically range from $10,000 to $80,000 annually depending on the volume of data under management, with implementation projects often requiring specialist contractors for three to six months. For a mid-sized metro council like the City of Fremantle or the City of Bayswater, that is a non-trivial line item in a capital works budget already stretched by housing demand, road maintenance and the cost pressures flowing from WA's tight construction labour market.

The practical upside is measurable. Organisations that complete deduplication projects typically report storage cost reductions of 40 to 60 percent on affected data sets, faster system search times and cleaner compliance trails — the last point increasingly relevant as WA agencies respond to more frequent FOI requests tied to planning disputes in growth corridors like Ellenbrook, Alkimos and Claremont's Bay View Terrace redevelopment precinct.

For agencies and councils yet to tackle the problem, the first step is a data audit scoped specifically to image assets — separating photographs from scanned documents and mapping which systems hold copies of what. Technology vendors active in the WA government procurement space, including those listed on the Department of Finance's Common Use Arrangement panel, offer audit-phase assessments that can be completed within a standard quarterly budget cycle. The longer agencies wait, the more images accumulate — and the bigger the eventual clean-up bill.