Milan Takes a Harder Line on Duplicate Street Imagery Than London or Paris

Milan's civic technology division has begun a systematic audit of duplicate geospatial imagery across the city's official digital mapping database — a process that, according to documents filed with the Comune di Milano's urban data directorate, is targeting an estimated 30 percent redundancy rate in street-level photographic records accumulated since 2018. The cleanup, which formally began in the spring of 2026, puts the city ahead of comparable efforts in London and Paris, where similar audits remain in early planning phases.

The timing is not coincidental. With the Milan-Cortina 2026 Winter Olympics now months away and infrastructure upgrades still reshaping corridors from Porta Nuova to the Fiera district near Rho, the city's digital maps have aged badly in some areas. Venues, transit routes, and commercial facades change quickly. Duplicate or stale imagery — often pulled automatically from multiple survey passes — compounds the confusion, presenting tourists, logistics operators, and emergency services with conflicting visual data about the same stretch of pavement.

What Milan Is Actually Doing

The Comune's project is running under the broader Smart City Milano framework, with technical support from Infrastrutture Lombarde, the regional infrastructure agency. Engineers are cross-referencing imagery tagged to specific coordinates along high-traffic corridors including Corso Buenos Aires and Via Tortona — the latter a hub of activity during Milan Design Week, when accurate wayfinding data can affect footfall for hundreds of exhibitors. Where multiple images exist for a single geopoint, an algorithmic scoring system ranks them by resolution, lighting quality, and date before flagging lower-ranked duplicates for human review and removal.

The practical stakes are visible in the Porta Nuova district, where construction phasing between 2020 and 2024 left layers of contradictory street-level records — scaffolding that no longer exists, pedestrian barriers long since removed, and temporary signage still appearing in some mapping applications as of early 2026. City officials identified at least 14 distinct sub-zones within the Porta Nuova footprint where duplicate imagery was creating navigational inconsistencies.

London's equivalent effort, managed through the Greater London Authority's Geospatial Commission working group, is still in consultation, with no formal deduplication timeline published as of June 2026. Paris, through its Agence parisienne du climat and the Ville de Paris data lab, piloted a smaller imagery rationalisation exercise covering parts of the 10th and 11th arrondissements in 2025, but has not scaled it city-wide. Barcelona's Institut Municipal d'Informàtica completed a comparable audit in 2023, reducing its street-imagery database by roughly 22 percent — a benchmark Milan is now explicitly trying to beat.

Why the Gap Between Cities Matters

Duplicate imagery is not merely a storage problem. Logistics companies routing deliveries across a city like Milan — which handles roughly 4.5 million parcel deliveries per month in peak periods, according to industry estimates for major northern Italian urban centres — depend on accurate visual anchors when automated systems fail or drivers need to verify an address. Emergency responders using mapping apps for navigation face similar risks when two images of the same intersection contradict each other in terms of road layout or signage.

The Milan project is also tied to a procurement cycle. The Comune signed a three-year contract with a geospatial data services provider in early 2025, with renewal contingent on demonstrable data quality improvements by December 2026. That deadline gives the audit real institutional urgency, beyond any general ambition toward smarter urban governance.

For residents and businesses, the most visible effect should arrive before the end of the year. The city has indicated that updated imagery for key Olympic-adjacent corridors — including areas around the Palazzo del Ghiaccio on Via Piranesi and transit connections to Linate airport — will be refreshed and deduplicated by October 2026, ahead of the Games. Businesses along those routes that have updated their shopfronts or signage in the past two years are being advised to submit correction requests through the Comune di Milano's open data portal, where a dedicated imagery dispute form has been available since March 2026.