How Central Coast Stacks Up Against Global Cities on Duplicate Image Management

Central Coast Council is working through a backlog of duplicate digital images embedded across its planning portal, heritage registers and community consultation platforms — a technical headache that has quietly inflated storage costs and slowed document-processing times inside the Gosford administration building on Mann Street.

The problem is not unique to the Central Coast. Councils and municipal governments from Newcastle to Newcastle-upon-Tyne have been wrestling with the same issue as legacy document systems, imported from multiple predecessor organisations, dumped redundant image files into unified databases without any automated deduplication layer. For the Central Coast, the challenge runs deeper than most: the 2016 merger of Gosford City Council and Wyong Shire Council produced one of the largest local government data migrations in NSW history, folding together two entirely separate image libraries into a single environment that still carries that historical weight.

A Problem Amplified by Merger History

The council's digital asset environment spans planning applications, flood mapping overlays, community engagement documents and the Gosford CBD renewal project materials — all of which generate high volumes of photographic and graphic content. Duplicate images, typically created when staff upload the same file through different portals or when automated systems ingest scanned documents twice, accumulate quickly. Industry estimates from the Australian Local Government Association suggest storage and retrieval inefficiencies linked to duplicate assets cost mid-sized councils tens of thousands of dollars annually in cloud infrastructure, though figures vary significantly by council size and system architecture.

By comparison, the City of Newcastle — which completed a similar post-merger data audit in 2023 — rolled out a deduplication protocol across its Pathways planning system within 18 months, according to reporting by the Newcastle Herald. Wollongong City Council moved earlier, integrating automated hash-based deduplication into its document management system as part of a broader digital transformation program completed in mid-2024. Both councils have attributed measurable reductions in processing times for development applications to cleaner image libraries.

Globally, the benchmark is set even higher. Amsterdam's city digital archive completed a four-year deduplication and metadata standardisation project in 2025, reducing its municipal image library by roughly 34 percent. Bristol City Council in the United Kingdom began a comparable program in 2022 under its Digital Bristol initiative, targeting heritage and planning records first. The common thread is prioritisation: every council that has moved quickly started with its planning and heritage collections, not general communications assets.

What Central Coast Is Doing About It

Central Coast Council's Technology and Digital Services directorate has flagged the issue as part of the organisation's broader digital uplift work, which forms a component of the post-administration recovery plan overseen since the council's return from NSW Government administration in 2021. The Gosford CBD renewal precinct — stretching along Mann Street and the Kibble Park corridor — has generated a particularly dense layer of new planning imagery since 2023, adding pressure to an already complex environment.

The Wyong region's community consultation materials, including image-heavy engagement documents produced for the Central Coast Regional Plan 2041 process, have also been identified internally as a high-duplication area, according to publicly available council operational reports. A formal audit of the council's Objective ECM document management system is understood to be scheduled as part of the 2026-27 financial year work program, though the council has not publicly confirmed a completion date or budget allocation for deduplication tooling.

For residents interacting with council through the planning portal — particularly those in Erina, Terrigal or the Gosford CBD who have lodged development applications in the past two years — the practical effect of image duplication can mean longer wait times when staff retrieve supporting documents during assessment. That friction, minor in isolation, compounds across hundreds of active applications.

The councils that have moved fastest globally share one characteristic: they tied deduplication directly to service delivery metrics rather than treating it as a pure IT housekeeping exercise. Central Coast's planning caseload, and the political pressure attached to Gosford's renewal, gives the council a similar ready-made case for urgency. The audit scheduled for this financial year will be the first real test of whether that case gets made internally.