OsmAnd Implements Custom Highway Hierarchy Algorithm for 100x Faster Offline Navigation
By
todsacerdoti
Baker's choice. Dense with flavour, light on filler.
Summary
OsmAnd, an offline navigation app, has developed a custom Highway Hierarchy algorithm to achieve a 100x speed boost in route calculation while maintaining offline functionality and user customization. The article explains how the traditional A* algorithm was hitting performance limits as maps grew more detailed, and how OsmAnd's new algorithm optimizes routing by creating hierarchical road networks that dramatically reduce computation time without increasing map file sizes.
Key quotes
· 4 pulledOffline navigation is a lifeline for travelers, adventurers, and everyday commuters.
How could we deliver a 100x speed boost without bloating map sizes or sacrificing the deep customization our users love?
The answer: OsmAnd's custom-built Highway Hierarchy algorithm
But as maps grew more detailed and user demands for complex routing increased, our trusty A* algorithm, despite its flexibility, started hitting a performance wall.
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