'Fix It Before You Fight It': What Officials and Experts Are Saying About Duplicate Images Plaguing Central Coast Council's Digital Records

Central Coast Council's geographic information system holds tens of thousands of property photographs, heritage records and development application images — and a growing number of them are duplicates. The problem, long acknowledged internally, is now forcing a reckoning as the council scales up its digital infrastructure to support the Gosford CBD revitalisation program and new planning overlays scheduled for public exhibition later in 2026.

The timing matters. Council only emerged from state-appointed administration in 2021 after a financial crisis that wiped out operational reserves and paralysed capital works. Rebuilding internal systems was always going to be the unsexy part of recovery. Duplicate image records — where the same photograph, scan or attachment is stored multiple times under different reference numbers — might sound trivial, but specialists in local government data management say the downstream consequences range from inflated storage costs to planning officers citing the wrong version of a site photograph during development assessment.

Why the Duplication Problem Is Getting Harder to Ignore

The Gosford CBD renewal project, centred on Mann Street and the broader Gosford waterfront precinct, is generating a surge in new submissions to council's electronic document management system. Heritage consultants working in the region say the volume of photographic attachments lodged with development applications has roughly doubled since the state government's Transport Oriented Development reforms began reshaping planning controls along the Gosford rail corridor in 2024. When original records are already compromised by duplication, layering new submissions on top compounds the problem.

Experts in digital records governance — including those who advise NSW local councils through the Local Government Information and Technology Association — have for years flagged that councils without automated deduplication protocols are vulnerable. The issue is not unique to Central Coast. But the council's particular history, including the data migration challenges that came with merging Gosford City Council and Wyong Shire Council into a single entity in May 2016, left a legacy of inconsistent file-naming conventions that makes manual cleanup an enormous task.

The practical stakes show up in planning. When a heritage officer pulls site images for a Mann Street terrace or a Terrigal beachfront property and retrieves two near-identical photographs filed under different document IDs, the question of which image is the authoritative record becomes a genuine legal exposure. Planning lawyers have noted in submissions to the NSW parliamentary inquiry into planning system efficiency — held earlier this year — that document integrity issues in council records can complicate merit appeals before the Land and Environment Court.

What the Council and Specialists Are Recommending

Council has flagged digital records improvement as part of its 2025-2030 Resourcing Strategy, a public document that identifies technology uplift as a priority investment area. The strategy does not put a dollar figure on the deduplication project specifically, but the broader digital transformation budget line runs into several million dollars over the forward estimates period.

Records management specialists point to three practical steps councils in this position typically pursue: first, running automated hash-matching software across the image library to identify exact duplicates without human review of every file; second, establishing a single authoritative file-naming standard tied to the council's property identification number system; and third, setting a cut-off date after which all new submissions must pass a duplication check before being accepted into the system. The third step is the most straightforward to implement and can be operational within weeks of a policy decision.

For residents and developers with active applications — particularly those in high-activity areas like Gosford station precinct, Erina Fair surrounds, or along the Terrigal Drive corridor — the practical advice from planning consultants is to label every submitted document with the exact lot and deposited plan number in the file name itself, not just in the accompanying form. That single habit reduces the chance of a submission image being filed incorrectly and then duplicated during system processing.

Council's next ordinary meeting, scheduled for later in July 2026, is expected to receive an update on the digital transformation program. Whether the deduplication question gets explicit airtime in the public session will depend partly on whether councillors — several of whom have already flagged data governance as a concern during budget deliberations — press for a specific agenda item. The pressure, from inside and outside the chamber, appears to be building.