A code for every 2.56 by 3.42 metres on Earth
A shared prefix is a shared cell.
Ten characters name any doorway on the planet. Each one narrows the world by twenty-five — from a block of it spanning two continents down to the step outside a front door.
#G3RJM-98NM9
Toronto43.650006, -79.380004
Ten characters, ten levels
Every character after the first selects one cell of a five-by-five division of the cell before it. Read the code from the left and the world closes in at a constant rate, which is what makes a prefix mean something.
- Level 1Block of the world5,001 km × 6,679 km
- Level 2Country1,000 km × 1,336 km
- Level 3Region200 km × 267.2 km
- Level 4Metropolitan area40.01 km × 53.43 km
- Level 5District8.002 km × 10.69 km
- Level 6Suburb1.6 km × 2.137 km
- Level 7A few streets320 m × 427 m
- Level 8Building64 m × 85.5 m
- Level 9Entrance12.8 m × 17.1 m
- Level 10Doorway2.56 m × 3.42 m