By the Numbers: The Hidden Scale of Duplicate and Outdated Images Across Central Coast Council's Digital Records

Central Coast Council is sitting on a digital asset problem it can measure in terabytes, staff hours, and delayed development applications. Across the council's geographic information system, planning portal, and public-facing property databases, duplicated and outdated aerial and site images have accumulated over more than a decade — a legacy of the financial administration period that ended in 2021 and the rushed digitisation efforts that followed.

The issue matters now because the council is mid-way through the Gosford City Centre Masterplan implementation, a program that depends on accurate, current site imagery to assess development proposals along Mann Street and the Georgiana Terrace precinct. When planning officers pull imagery from council's internal document management system and find three or four versions of the same parcel photograph — sometimes spanning five or more years of change — the result is avoidable delays and, in some cases, incorrect baseline assessments.

What the Numbers Show

Duplicate image files are not a trivial annoyance. In local government environments comparable to Central Coast, audits of document management systems have found that between 25 and 40 per cent of stored image assets are redundant duplicates or superseded versions, according to published guidance from the NSW State Archives and Records Authority. For a council managing spatial data across a 1,681-square-kilometre local government area — stretching from Woy Woy in the south to Kulnura in the north — the storage and retrieval burden compounds quickly.

Council's 2024–25 annual report listed digital transformation as a priority investment area, with funds directed toward upgrading the Civica Authority platform used for development applications. The DA processing backlog at Gosford and Wyong service centres has been a recurring community complaint; imagery duplication is one documented contributor to the administrative drag inside that workflow, even if it rarely makes the agenda at an ordinary council meeting.

Consider the practical arithmetic: if a planning officer spends 15 minutes per application reconciling conflicting site photographs across three stored versions of the same image, and the council processes roughly 3,500 DAs per year — a figure consistent with Central Coast's recent planning volumes — that translates to more than 875 staff hours annually. At mid-range local government administrative pay rates of around $45 per hour, that is approximately $39,000 in labour absorbed by a problem that is, in principle, solvable with a structured deduplication program.

What Needs to Happen Next

The practical fix sits in two places. First, the council's Enterprise Records team, based at the Wyong administration building on Hely Street, needs to run a formal image audit against the document management system — identifying files by hash value, capture date, and parcel identifier — before the next phase of the Gosford Urban Activation Precinct assessment gets underway in late 2026. Second, any new aerial photography contracted through the NSW Spatial Services program, which delivers statewide imagery capture under the Continual Airborne Capture and Monitoring arrangement, should be ingested through a single, version-controlled repository rather than across multiple departmental folders.

The Central Coast Regional Planning Panel, which handles applications above a certain threshold, has flagged documentation quality in its determination reports more than once. Cleaner imagery records would reduce the back-and-forth between applicants and council officers, particularly for sites around Erina Fair, where retail and mixed-use rezonings have been active for the past two years.

None of this is technically complex. The NSW Government's own Digital Strategy, updated in 2023, explicitly encourages councils to adopt automated deduplication workflows as part of broader data hygiene obligations. Central Coast has the mandate, the platform, and — after three years out of administration — the institutional stability to tackle it. The question is whether it makes the priority list before the Gosford renewal pipeline puts even more pressure on an already stretched planning division.