How Denver's Public Art Program Ended Up With Hundreds of Duplicate Images — and What Happens Next

Denver's Office of Arts & Culture is sitting on a digital archive riddled with duplicate images — some artworks photographed four or five times under different file names, others cross-listed across multiple city databases with no consistent tagging standard. The problem, which city staff have acknowledged in internal working sessions this year, stems from a patchwork of software migrations and a rapid expansion of the public art collection that outpaced the city's record-keeping infrastructure.

The issue matters now because Denver is mid-way through a significant update to its public-facing art map, the interactive online tool that residents use to locate murals, sculptures and installations across the city. That map, managed through the Denver Arts & Venues department, is expected to relaunch with cleaner data in late 2026. But before any relaunch can happen, staff must manually audit thousands of image records — a job complicated enormously by the duplicate problem.

How the Backlog Built Up

The roots of the duplication issue trace to roughly 2019, when Denver Arts & Venues migrated its collection data from an older asset management system to a newer platform. During that migration, image files were imported in batches without a deduplication step, according to city budget documents reviewed for this article. Subsequent rounds of photography commissioned through the Denver Public Art program — which adds new permanent works to city-owned properties — were uploaded by multiple contractors using different naming conventions. A sculpture installed near the 16th Street Mall, for example, might appear in the archive under the project number, the artist's name, the street address, and a generic descriptive tag, each entry carrying its own set of image files.

The collection grew quickly during those years. Denver's public art inventory now includes more than 450 permanent works, spread from the Red Rocks Amphitheatre corridor on the city's western edge to the Stapleton redevelopment area — now known as Central Park — on the northeast side. Each addition meant new photography sessions, new uploads, and new opportunities for redundancy to creep in.

Community arts organisations that partner with the city compounded the challenge. Groups like Crush Walls, which coordinates the large-scale mural program centred on the River North Art District, submitted image packages to Arts & Venues in formats that didn't always align with the city's internal standards. The result: a single mural on Brighton Boulevard might be represented by a high-resolution TIFF from the artist, a JPEG from a city photographer, and a smartphone snapshot from a community liaison — none of them flagged as referring to the same work.

What the City Is Doing to Fix It

Denver Arts & Venues launched a dedicated image audit working group earlier this year, drawing on staff from the public art, communications and technology services divisions. The group is using a combination of automated hash-matching software — which identifies visually identical files — and manual review for cases where images are similar but not exact duplicates. City budget documents for fiscal year 2026 allocated funding within the Arts & Venues operating budget for contractor support on the project, though the specific dollar figure was not broken out as a standalone line item.

The practical stakes extend beyond housekeeping. When residents search the public art map for a work near, say, City Park or the Santa Fe Arts District, duplicate entries can return confusing results or, worse, suppress the correct record entirely. Educators who use the archive for curriculum projects have flagged the problem to Arts & Venues staff on multiple occasions over the past two years.

The audit is expected to be completed before the public art map relaunch, tentatively scheduled for the fourth quarter of 2026. Once deduplication is finished, the department plans to adopt a single-entry standard requiring each work to carry one primary image file, with supplementary angles stored under a clearly labelled secondary field. New photography commissions issued after that point will require contractors to follow the updated file-naming protocol before submission is accepted. Residents who spot missing or misidentified works on the current map can submit corrections directly through the Denver Arts & Venues website.