Duplicate Images, Duplicate Problems: How Central Coast Stacks Up Against Cities Tackling the Same Digital Planning Headache

Central Coast Council is quietly grappling with a problem that has quietly sabotaged planning decisions from Newcastle to Newcastle-upon-Tyne: duplicate images clogging development application portals, property registers and public-facing planning maps. The issue, long treated as a minor IT nuisance, is now drawing scrutiny as councils accelerate digital transformation projects tied to housing delivery targets under the NSW Government's Transport Oriented Development program.

The timing matters. Sydney recorded its hottest June since 1859 this week, a data point that has pushed climate resilience planning up the agenda for coastal councils across New South Wales. Accurate, current imagery — of drainage corridors, flood-prone lots, and coastal erosion zones — is not an administrative nicety. It is infrastructure. When duplicate or mislabelled images populate a planning portal, assessors can pull the wrong file for the wrong parcel and base recommendations on outdated site conditions.

What the Problem Actually Looks Like on the Ground

On the Central Coast, the issue has a specific geography. The Gosford CBD renewal precinct, centred on Mann Street and the blocks running east toward Kibble Park, has been the subject of repeated DA lodgements over five years of stop-start redevelopment. Each new application cycle generates fresh site photographs, aerial captures and heritage overlays — many of which are uploaded alongside, rather than in replacement of, earlier versions. Council's planning portal, rebuilt following the 2020–2021 administration period under State Government-appointed administrator Rik Hart, inherited a legacy document environment that staff have described publicly as requiring ongoing remediation.

The Central Coast Community Environment Network and the Darkinjung Local Aboriginal Land Council have both engaged with Council's planning processes in recent years and would be among the community stakeholders affected if site imagery used in heritage or environmental assessments is unreliable. Neither organisation has made public statements specifically about image duplication, but both participate actively in DA consultation processes where document accuracy is foundational.

Globally, the comparison is instructive. Bristol City Council in the United Kingdom completed a structured deduplication audit of its planning image library in 2023, reducing stored planning imagery by an estimated 34 percent and cutting retrieval times for assessors. The Dutch municipality of Almere, a planned city of roughly 230,000 people with demographic parallels to the Central Coast's growth corridor between Gosford and Wyong, embedded automated hash-matching tools into its omgevingsloket — its integrated planning portal — as part of a 2022 digitisation program. Auckland Council in New Zealand, which underwent its own amalgamation trauma when eight legacy councils merged in 2010, published a lessons-learned report in 2021 noting that duplicated site records were among the top five data quality failures identified in post-merger audits.

Central Coast's Post-Administration Window

Central Coast Council returned to elected representation in December 2021 after a period of state-appointed administration triggered by a financial crisis that left the organisation with a reported debt exceeding $565 million. The rebuild of internal systems, including records and document management, has been phased across several years. A Digital Transformation Program has been referenced in Council's publicly available Resourcing Strategy documents, though specific milestones for planning-portal image governance have not been detailed in materials available to this publication at time of writing.

The practical stakes are rising. Under the Gosford City Centre housing targets embedded in the NSW Government's planning reforms, the precinct is expected to absorb significant residential density over the next decade. Every DA for a high-rise on a former car park off Georgiana Terrace or a mixed-use conversion near Gosford Train Station will generate new site imagery. Without a systematic deduplication protocol, the backlog compounds.

For residents and developers navigating the system, the immediate advice from planning consultants operating on the Coast is straightforward: when lodging a DA through the NSW Planning Portal, explicitly version-label every image file and include a site-photo log sheet as a separate document, noting the date and GPS coordinates of each capture. It is a workaround, not a fix — but it reduces the risk of an assessor relying on a photograph taken before a site was cleared, flooded, or subdivided. Council's long-term answer will need to come from the digital systems side. The cities that have solved this problem did so by treating image governance as planning infrastructure, not paperwork.