How the Upper West Side's Street Archive Ended Up Full of the Same Photo Twice

The Upper West Side's online image archive, maintained as part of the city's broader digital infrastructure program, contains thousands of photographs documenting the neighborhood's streetscapes, landmarks, and community spaces. A significant number of those photographs appear more than once. Some appear three or four times. The effort to systematically identify and replace those duplicates has been underway since early 2025, and it is still not finished.

The problem did not emerge overnight. Understanding where it came from requires going back to at least 2018, when the city consolidated several overlapping municipal photography contracts into a single vendor relationship. At the time, the New York City Department of Records and Information Services absorbed image collections from multiple predecessor programs. Deduplication was not a stated deliverable in that contract cycle. Photographs migrated across platforms without a standardized naming convention, and the same image, say, a shot of the Dakota building at 72nd Street and Central Park West, could land in the archive under half a dozen different file identifiers.

A Patchwork System That Grew With the Neighborhood

Community organizations on the Upper West Side have been among the loudest voices pushing for cleaner records. The Bloomingdale Neighborhood History Group, which draws on city-held archives for its own documentation of the blocks between West 96th and West 110th Streets, flagged the duplication issue formally in a letter to the Department of Records in March 2024. The West Side Rag, the neighborhood's most widely-read local publication, ran an item on the problem the following month after readers began noticing the same storefronts appearing repeatedly on city-facing maps tied to the West 79th Street Business Improvement District zone.

Part of the explanation is technical. When the city migrated to a new content management system in 2022, automated scripts pulled from multiple legacy databases simultaneously. Images that had already been ingested once were not cross-checked against existing entries because the hash-matching protocol, the standard method for detecting identical files by their digital fingerprint, was not fully implemented until the migration was nearly complete. The result: entire folders worth of material from neighborhoods including Morningside Heights and Riverside Drive were essentially doubled in the system before anyone noticed.

A secondary cause was more straightforward. Between 2019 and 2023, three separate municipal photography initiatives, a streetscape documentation program, a landmarks survey tied to the Landmarks Preservation Commission, and a COVID-era essential-services mapping project, all captured overlapping geography on the Upper West Side without a shared tagging protocol. Broadway between West 72nd and West 86th Streets alone appears in all three programs. None of the programs communicated with each other about what they had already shot.

What the Cleanup Actually Looks Like

Since January 2025, city staff assigned to the duplicate-image-replacement project have reviewed and resolved roughly 14,000 flagged files across all five boroughs, according to a project status update published by the Department of Records on its website in May 2026. The Upper West Side and neighboring Community Board 7 territory accounts for an estimated 9 percent of the total flagged inventory, a proportion the status update attributes to the density of landmark-designated buildings in the area.

The replacement process is not simply deletion. When a duplicate is confirmed, archivists must determine which version is the canonical file, sometimes the difference is meaningful, a slightly different crop or a timestamp that places the image in a historically distinct period, and then manually update every internal link or metadata reference that pointed to the discarded copy. For a neighborhood with as many active research and community-planning users as the Upper West Side, that step generates its own backlog.

For residents and local organizations trying to access clean, reliable image records, for everything from a Landmarks Preservation Commission hearing on Amsterdam Avenue to a Columbia University urban-planning class project, the practical advice is the same as it has been for the past year: cross-reference any archival image against at least two independent source dates before citing it in a formal submission. The Department of Records has published a verification request form on its website, and the processing time as of June 2026 is listed at approximately 10 business days per file.