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| title: Trackemdown | |
| emoji: 🐢 | |
| colorFrom: blue | |
| colorTo: indigo | |
| sdk: gradio | |
| sdk_version: 5.46.1 | |
| app_file: app.py | |
| pinned: false | |
| license: apache-2.0 | |
| short_description: A simple learning project to explore H3 geospatial indexing. | |
| Type any address and get: | |
| - Exact coordinates (latitude, longitude) | |
| - H3 geotag (hierarchical hexagonal identifier) | |
| - Interactive map with hexagon boundaries | |
| #### How it works | |
| 1. Address → Coordinates: Uses `OpenStreetMap Nominatim` to find locations | |
| 2. Coordinates → H3 Geotag: Converts to Uber's H3 hexagonal grid system | |
| 3. Visualisation: Shows results on an interactive map | |
| #### Examples | |
| Try typing: | |
| - San Francisco - City names | |
| - 37.7749,-122.4194 - Direct coordinates | |
| - Eiffel Tower - Landmarks | |
| - Main Street - Generic addresses (shows multiple matches) | |
| #### What's H3? | |
| H3 divides Earth into hexagonal cells at different resolutions: | |
| - Low resolution (0-5): Continental/country level | |
| - Medium resolution (6-10): City/neighborhood level | |
| - High resolution (11-15): Building/room level | |
| #### Tech Stack | |
| - Backend: FastAPI + H3 library | |
| - Geocoding: OpenStreetMap Nominatim (free service) | |
| - Frontend: Gradio interface | |
| - Maps: Plotly with hexagon boundary visualization |