DOOH Marketing
Geofencing DOOH: How Location Targeting Actually Works
GPS coordinates, not cookies. Here's the mechanism.
Every digital out-of-home screen gets a GPS coordinate assigned the moment it's physically installed. That coordinate — latitude and longitude — is stored in a geospatial database. When you draw a geofence, the platform queries that database and returns every screen whose coordinates fall inside the boundary. No cookies. No mobile IDs. No consent frameworks. The screen is either inside the fence or it isn't.
Three Ways to Draw a Geofence
Point radius: A circle around a single coordinate. Example: all screens within 0.5 miles of 123 Main St. Standard for store proximity campaigns where you want to reach consumers near a specific location.
Custom polygon: A hand-drawn shape around an irregular area like a neighborhood, campus, or event footprint. Used when a circle would capture unwanted locations — a college campus that borders a highway, a downtown district that has a competitor on the adjacent block.
Road geofence: A corridor along a specific road or highway, capturing only screens visible from that route. Used for commuter campaigns along a defined corridor — I-95 between exits 4 and 12, or a specific stretch of Sunset Boulevard.
Why DOOH Geofencing Is More Accurate Than Mobile
Mobile geofencing relies on device location signals — GPS, cell tower triangulation, or IP address. Apple and Google privacy changes in iOS 14+ and Android 12 degraded signal quality significantly. DOOH bypasses this entirely. The screen's coordinate is a fixed physical measurement taken at installation. It doesn't drift. It doesn't need user permission. It doesn't get blocked by a platform update.
The Burger King Whopper Detour campaign — where Burger King geofenced every McDonald's location in the US and triggered a $0.01 Whopper offer to nearby app users — worked because OOH screen coordinates are precise enough to distinguish a competitor's parking lot from the street out front. Mobile targeting cannot make that distinction reliably.
What You Can Actually Target
Specific competitor locations — run your ad on every screen within walking distance of a rival's storefront.
Event venues during event windows only — time-gated geofencing activates screens around a stadium only on game days, or around a convention center only during the trade show.
All your own store locations simultaneously — upload a CSV of addresses, the platform converts them into geofences automatically.
Foot traffic patterns near venues your audience visits regularly — gyms, coffee shops, co-working spaces.
Highway corridors between two cities — reaching commuters and travelers on a specific route.
A specific neighborhood without bleeding into the adjacent one — custom polygons solve this precisely.
Geofencing Plus Retargeting — The Second Layer
A geofence can also build a retargeting audience. Devices observed near a geofenced location during your campaign window get added to a mobile segment. Your DOOH ad runs on physical screens; a follow-up mobile ad runs on their phone. The combination — physical impression, then digital follow-up — consistently outperforms either channel alone. Attribution studies show 2–3x higher conversion rates for dual-layer campaigns vs. DOOH-only. See how we structure retargeting without relying on device IDs on the DOOH retargeting page.
How to Measure a Geofenced Campaign
Foot traffic lift: Did people near your screens visit your location more than a control group did? Measured via mobile device observation in the geofenced area vs. a matched control area.
Sales lift: Compare revenue in geofenced markets vs. non-geofenced markets during the same period. Requires point-of-sale data or coupon redemption tracking.
Mobile retargeting conversion: What percentage of retargeted devices completed a desired action — site visit, store visit, app open? Measured via pixel tracking on the mobile retargeting layer.