The GPS Track (.gpx) Telemetry Video Overlay Generator parses recorded GNSS activity tracks to create clean heads-up display (HUD) telemetry overlays for cycling, running, and action camera footage.

### Track Telemetry Architecture The generator parses standard XML-based GPX waypoint and track point data in client-side JavaScript: - **XML Track Point Extraction**: Scans trkpt elements containing latitude, longitude, elevation (ele), and UTC timestamp (time) coordinates. - **Key Performance Telemetry**: - **Total Distance**: Computes cumulative track distance across sequential coordinates ($24.6\text{ km} / 15.3\text{ mi}$). - **Maximum Speed**: Evaluates point-to-point velocity spikes ($48.2\text{ km/h} / 29.9\text{ mph}$). - **Elevation Gain**: Aggregates positive vertical climbing ascent ($+620\text{ m} / 2{,}034\text{ ft}$). - **Color Themes**: Toggle between high-contrast Cyan, Orange, and Monochrome White telemetry HUD styling.

### Practical Telemetry Workflow Creating an action camera dashboard overlay for a mountain biking video: 1. Export a .gpx route file from your Garmin, Strava, or Apple Watch activity log. 2. Load the GPX file into the telemetry parser (or use the built-in trail run demo track). 3. Select the **Cyan HUD** theme for high visibility against outdoor trail foliage. 4. Review the parsed total distance, max speed, and climbing metrics displayed in the transparent overlay frame.

### In-Browser Processing & Privacy Note All XML parsing and telemetry metric extraction run strictly inside local browser memory. No GPS tracks, home coordinates, or personal activity logs are uploaded to external cloud services.