Duplicate Image Replacement: How the Central Coast Stacks Up Against Cities Tackling the Same Digital Planning Headache

Central Coast Council is working through a systematic audit of duplicated and outdated imagery embedded across its digital planning and asset management systems, a problem that has quietly ballooned since the council emerged from state administration in 2021. The effort, part of a broader data hygiene push tied to the Gosford CBD renewal program, places the Central Coast alongside mid-sized regional cities globally that are confronting the same unglamorous but consequential problem: when your planning records are cluttered with duplicate or superseded images, infrastructure decisions get made on bad information.

The timing matters. Sydney's record-breaking winter heat — the hottest June since 1859, according to Bureau of Meteorology records — has sharpened urgency around climate resilience planning on the Coast, where flood mapping, stormwater infrastructure audits and coastal erosion assessments all depend on accurate, up-to-date visual asset records. Bad imagery in those files isn't just a filing nuisance. It can mean a drainage asset near Narara Creek is assessed against a photo taken before 2016 flood damage, or a development application on Mann Street in Gosford is weighed against a streetscape image that predates three years of CBD construction activity.

What the Global Comparison Looks Like

Mid-sized cities recovering from governance disruption tend to share a recognisable pattern in this space. Christchurch, New Zealand, which rebuilt its civic data infrastructure after the 2011 earthquakes, set a widely cited benchmark by completing a full asset image deduplication across its geographic information system by 2018, reducing storage redundancy by roughly 34 percent and cutting assessment processing times for building consents. Closer in profile to the Central Coast, the City of Ballarat in Victoria undertook a comparable audit between 2022 and 2024 as part of a post-COVID digital transformation program, rationalising tens of thousands of asset photographs held across multiple legacy platforms.

The Central Coast's challenge is complicated by the fact that its council was, for roughly two years, run by state-appointed administrators — a period during which data governance protocols were inconsistent and some departmental image libraries grew in parallel rather than in sync. The council's Information and Communication Technology directorate has been working since at least mid-2024 to consolidate asset imagery held across platforms including its enterprise asset management system and the Civica Authority records suite used for development applications. Specific deduplication completion timelines have not been publicly announced.

Gosford's CBD renewal precinct, bounded roughly by Mann Street, Donnison Street and the waterfront along Brisbane Water, is the most active zone for this work. Planning officers assessing development applications in that corridor require current, verified imagery to cross-reference against heritage overlays and flood-prone land categories. The Gosford Regional Library on Baker Street, currently under consideration as part of broader civic precinct planning, is among the heritage-listed assets whose image records require verified, current photography rather than legacy duplicates.

What Needs to Happen Next

Internationally, the clearest lesson from cities that have completed this process is that deduplication works best when it is tied to a specific project trigger — a rezoning, a major infrastructure upgrade, or a strategic plan review — rather than run as a standalone IT exercise. Christchurch linked its 2018 cleanup directly to its central city blueprint delivery. Ballarat tied its audit to a digital twin pilot program for its heritage precinct.

For the Central Coast, the most logical trigger already exists: the long-running Gosford CBD master plan and the council's Local Strategic Planning Statement, which identifies the Gosford waterfront and the Wyong town centre on Pacific Highway as priority renewal corridors. Aligning the image audit to those two precincts first, rather than attempting a council-wide sweep, would give the project a defined scope and a measurable outcome.

Residents or developers lodging applications through the NSW Planning Portal who encounter assessment delays linked to imagery discrepancies can request a formal pre-lodgement meeting with Central Coast Council's development assessment team, based at 2 Hely Street, Wyong. The council's current service standard for pre-lodgement responses is 20 business days, though complex applications in the Gosford CBD renewal area may take longer given the volume of concurrent activity in that corridor.