Technology
From map data to a line on the mountain
US Patent 11,480,441 B2 covers the full pipeline — server-side 3D route generation and device-side AR rendering. The embodiment is trails; the claims generalize to any AR-rendered geospatial route on a mobile or wearable device. Here is how it works, end to end.
Server side - building 3D routes
- Geospatial reference pointsTrail geometry is ingested as sequences of geospatial reference points from map data.
- Compressed polylinesRoutes are encoded as compressed polylines - compact enough to sync and cache at scale.
- Elevation enrichmentEach route is enriched with elevation data, interpolated between samples for a continuous 3D profile.
- 3D trail databaseThe result: a queryable database of 3D routes ready for AR delivery - 15,000+ US trails today.
Device side - rendering on reality
- Geodetic → cartesian conversionRoute coordinates convert to a cartesian frame relative to the user's position.
- Location nodes & route overlayLocation nodes anchor a cylindrical route overlay onto the live camera view.
- Continuous recalculationGPS and IMU input drive continuous recalculation, keeping the overlay aligned as the user moves.
- Offline cachingRoutes, elevation, and basemap are cached on the device - the pipeline runs with zero connectivity.
What the app adds on top of the patent
Positioning fusion
A proprietary layer fuses GPS with ARKit visual-inertial odometry. GPS gives absolute position; the camera and IMU give short-term precision. Fused, they hold the overlay to the terrain without the drift that breaks naive GPS-anchored AR.
Tracer rendering
The route draws as a Metal-rendered glowing line with animated direction pulses - think golf-shot tracer, tuned for navigation - color-coded by trail difficulty. It reads instantly at a glance, in daylight, at speed.
Why it’s defensible
- Scope. US Patent 11,480,441 B2, “Systems and methods for trail visualization using augmented reality,” granted October 25, 2022. Claims cover the server-to-device pipeline: 3D route generation from geospatial data and AR rendering relative to the user.
- Term. Active through March 2041.
- Citation profile. Cited five times since grant — by Qualcomm (AR/XR localization), Liebherr Aerospace (industrial AR maintenance), an international vehicle AR display filing, and a geospatial computation filing. Other industries already reference this patent.
- Reference implementation. The TrailAware iOS app ships the full pipeline in production - not a paper patent.
Where the pipeline applies
Trails are the working proof. The claims cover any geospatial path drawn on a live camera or AR display — wherever a person or machine needs to see a route on the real world, including fully offline.
Automotive & HUD navigation
The route drawn on the road ahead, through the windshield.
AR glasses & XR platforms
Anchored wayfinding for headsets and glasses — Qualcomm’s citation is the proof point.
Heavy equipment & construction
The dig line drawn on the ground for the operator — Liebherr’s citation shows the industrial pull.
Ski & snow resorts
Runs, boundaries, and lift lines drawn on the mountain for guests.
Marine & waterways
The channel drawn on the water — harbor approaches and no-wake zones in view.
Aviation & drones
The flight path drawn in the sky for pilots and drone operators.
Golf
Your line drawn on the fairway, from tee to pin.
Utilities & infrastructure
Buried lines and service routes visualized on site before the shovel hits dirt.
Aerospace & MRO
Guided inspection and maintenance paths rendered on the equipment itself.
Agriculture
Row and path guidance drawn over the field for operators and machines.
Defense & training
Patrol routes and objectives rendered offline, where connectivity is not an option.
Tourism & venues
Heritage walks, campus wayfinding, and event routes drawn on the real world.
A license includes patent rights, the reference implementation, and integration support — as a field-of-use license, an exclusive vertical license, or acquisition.
Start a licensing conversationSee trails on the real world.
Free on the App Store. Technology available for licensing.
