Travel Mapping & Visualization Guide
User Guide & Cartographic Principles · Updated August 2026
Welcome to the comprehensive guide for MyBreadcrumbs. This reference outlines best practices for logging your travels, understanding great-circle navigation, and interpreting your global travel metrics.
1. Getting Started: Logging Your First Journey
Step 1: Choose Your Transit Mode
Select whether your leg is a Flight (cyan arc), Rail journey (emerald arc), Road trip (amber curve), or Cruise (purple arc). Selecting the proper transit mode configures the altitude rendering above the 3D surface.
Step 2: Select Origin & Destination
Type the departure city or 3-letter IATA airport code (e.g. JFK, LHR, HND, CDG). Our global airport database automatically matches coordinates down to four decimal places of precision.
Step 3: Add Travel Dates & Personal Notes
Enter the departure date and optional notes (e.g., flight number, scenic stops, cabin class). Once saved, your 3D arc animates instantly on the globe.
2. Understanding Great-Circle Arcs vs. Flat Maps
Many travelers wonder why long-haul flight routes appear curved when drawn on 2D maps. The shortest distance between two points on the surface of a sphere is the Great-Circle Path (geodesic curve).
- Polar Navigation: Flights from New York to Tokyo or London to Los Angeles route high north near the Arctic circle because this reduces hundreds of miles of flight time.
- Spherical Accuracy: MyBreadcrumbs renders each flight leg as an authentic 3D Bezier curve anchored along the great-circle vector, accurately matching commercial aviation flight paths.
3. Key Travel Metrics Explained
- Total Distance: The cumulative statute miles or kilometers traversed across all logged journeys.
- Earth Circumferences (Laps): Calculated by dividing your total miles by the equatorial circumference of Earth (24,901 miles / 40,075 km).
- Distance to the Moon: Visualizes your lifetime mileage against the average lunar distance (238,855 miles / 384,400 km).
- Country Passport Counter: The number of internationally recognized sovereign countries and dependent territories you have explored.
4. Managing Offline Expeditions
If you are on an international flight without active Wi-Fi, you can still add, edit, and explore your journeys. MyBreadcrumbs caches all core 3D textures and database indices directly in client storage. Once your device reconnects to a network, your new records will automatically sync with your account.