'Fix It Before It Fails': What Officials and Experts Are Saying About the Central Coast's Duplicate Image Problem in Planning Documents

Central Coast Council's planning directorate is under mounting pressure to audit and replace duplicate and outdated aerial images embedded across dozens of active planning documents — a technical problem that practitioners say is quietly undermining the region's ability to make sound decisions about housing, flood risk and infrastructure.

The issue surfaced publicly through feedback lodged with the council's development assessment unit in Gosford during the June quarter, when multiple applicants flagged that flood overlay maps attached to their assessment reports contained imagery that did not match current ground conditions. In several cases, images were repeated across separate site reports, raising questions about whether reviewers were working from accurate spatial data.

The timing matters. NSW is in the middle of a state-wide push to accelerate housing approvals, and the Central Coast — still rebuilding institutional capacity after emerging from state-mandated financial administration in 2022 — is processing a higher-than-usual volume of development applications as Sydney commuters continue to look north along the M1 corridor for affordable land.

Why Accuracy in Planning Images Is Not a Paperwork Problem

Professionals working across development, hydrology and community planning say duplicate or mismatched images in assessment documents are not a minor formatting error. They affect flood overlays, site suitability classifications and vegetation mapping — all of which carry direct legal and financial consequences for property owners and developers.

The concern is especially pointed for areas like Wyong, Tuggerah and the Entrance Road corridor, where land sits close to flood-prone catchments and where small mapping errors can shift a parcel from one planning risk category to another. The Central Coast floodplain includes roughly 40,000 properties identified under various flood planning levels in the council's 2023 Floodplain Risk Management Study, a document that itself relies on georeferenced imagery for accuracy.

The council's GIS and spatial data team, based at the Gosford administration centre on Mann Street, manages the underlying image layers used across planning instruments. Officers have reportedly flagged to the development assessment team that some imagery layers in templated report packages have not been refreshed since aerial surveys conducted prior to the 2021-22 flooding events — events that reshaped large sections of the Tuggerah Lakes foreshore and parts of the Wallarah Creek catchment near Wyongah.

Urban planners familiar with the council's document workflows say the root cause is template reuse. When a standard planning report template is duplicated for efficiency, any embedded image that is not dynamically linked to the live GIS database carries over unchanged. Without a mandated refresh step in the assessment checklist, reviewers may not catch the duplication before a report is finalised and published.

What Comes Next for Applicants and the Public

Central Coast Council has not publicly announced a formal audit program, but planning sector contacts indicate internal discussions are underway about updating the template protocols used by the development assessment team. The council's post-administration improvement agenda, which has been running since elected representatives returned to office in December 2024, includes a digital systems review covering spatial data integration.

For residents and developers with active applications, practitioners recommend independently cross-referencing any flood or vegetation overlay against the NSW Spatial Viewer, a free state government tool that draws on current imagery. Properties along Avoca Drive in Green Point, around Terrigal Drive near the Terrigal roundabout, and along Pacific Highway through Gosford have all appeared in recent assessment discussions where mapping accuracy was raised.

The practical advice from planning consultants working locally is straightforward: do not assume the images in a council-issued planning report are current. Request the image capture date in writing before relying on any overlay for a financial or construction decision.

The council's next ordinary meeting is scheduled for July 28 at the Gosford chambers on Mann Street, where the development committee agenda is expected to include updates on assessment process improvements. Whether the duplicate image issue reaches that agenda will depend on whether staff formally escalate it in the coming weeks.