DashLoc

What we built: GeoTrace works out where a dashcam clip was recorded from the video alone, with no GPS and no metadata. It reconstructs six 15-minute Toronto trips on a map, to a median of 10 m when we hide a sign and predict where the car was. It can also check a claim, such as “was this recorded at X?”: a made-up location came back 557 km off. We also built TripScore, which gives each trip an explainable driving-risk score from the same footage.How it works: Cosmos3-Reason reads street signs, business names, tram tracks, motion and turns from every 5-second segment. An anchor-chain solver then matches the sign reads to the OpenStreetMap road network and rejects misreads that don’t fit the distance and timing. Optical flow measures turns independently, and a second model re-checks each sign from the clip’s frames. An independent business-name check agrees for 38 of 73 names within 300 m. The app is deployed on the team cluster.Sponsor tech: