How Ballarat's public image archive ended up full of duplicates — and what's being done about it

Ballarat's digital image collections — spread across the City of Ballarat, Sovereign Hill, the Art Gallery of Ballarat, and various regional tourism bodies — contain thousands of duplicate photographs, many uploaded multiple times across different platforms and funding rounds over the past decade. The duplication problem, long acknowledged informally by archivists and communications staff, is now the subject of a formal remediation effort following a review of digital asset management practices that concluded in the first half of 2026.

The issue matters now because the cost of storage, licensing confusion, and outdated metadata attached to duplicate files has become a practical drag on organisations trying to promote Ballarat to visitors, grant bodies, and media outlets. With Sovereign Hill having drawn significant state and federal tourism investment in recent years, and with the Art Gallery of Ballarat on Lydiard Street managing a growing digitised collection, the question of which image is authoritative — and who owns the rights — has become more than a housekeeping concern.

How the duplication built up over years

The accumulation happened gradually and for understandable reasons. Between roughly 2014 and 2024, successive Victorian government programs funded regional councils and cultural institutions to digitise their collections. Each new grant round often came with its own platform requirement or reporting deliverable, which meant organisations uploaded batches of images to multiple systems — sometimes Tourism Victoria's asset portals, sometimes their own websites, sometimes third-party content management tools — without a centralised deduplication step.

Sovereign Hill, which sits on Bradshaw Street in Ballarat's inner west and is among the most photographed heritage sites in regional Victoria, accumulated particularly large image sets because of its dual role as both a tourist attraction and an educational resource. Marketing images produced for one campaign were routinely re-uploaded in slightly cropped or resized versions for subsequent campaigns, creating chains of near-identical files with inconsistent file names, conflicting copyright metadata, and different resolution specs.

The Art Gallery of Ballarat, whose permanent collection includes significant works tied to the goldfields era, faced a parallel problem with its digitised collection records. When the gallery migrated platforms in the early 2020s, some collection images were carried across more than once, generating duplicate catalogue entries that complicated both internal searches and public-facing collection browsing tools.

What a structured cleanup actually involves

Duplicate image replacement — the process of identifying redundant files, selecting a canonical version, redirecting or retiring the others, and updating all associated metadata — is more labour-intensive than it sounds. For institutions with collections running to tens of thousands of images, a manual review is not viable. The standard approach now involves perceptual hashing algorithms, which compare images by their visual content rather than their file names, allowing near-duplicate detection even when files have been resaved in different formats or at different resolutions.

The City of Ballarat's communications and digital teams have been working through this process across council-owned image assets, with the review having identified a substantial proportion of the active image library as either exact duplicates or near-duplicates redundant enough to be retired. Organisations going through this process typically find that a meaningful share of their stored images — industry estimates from digital asset management consultancies commonly put this at between 20 and 40 percent of unmanaged libraries — offer no unique visual information beyond what a canonical version already provides.

For Ballarat specifically, the remediation also intersects with heritage obligations. Some images held by the Ballarat Heritage Office on Sturt Street document streetscapes, buildings, and sites that no longer exist in their photographed form, meaning decisions about which version to retire carry historical weight beyond simple file management.

Organisations currently working through duplicate image reviews should prioritise establishing a single source-of-truth library before the next round of regional tourism marketing materials is produced — typically in the August-to-October window ahead of the summer visitor season. Getting the canonical files right now means that image assets pushed to media, to Tourism Greater Geelong and the Bellarine, or to Visit Victoria will carry clean metadata and clear licensing terms from the outset, rather than requiring another retrospective fix two grant cycles from now.