Patent ID: 9404759
Filing Date: 2016-08-02
CPC Classification: G01C,G06F,H04L

Claim Text:
1. A method of generating a route to a destination comprising: prefetching, with a processor of a user device, a first plurality of map partition data for a first area from a remote computer at a first point in time, each of the first plurality of map partition data being encoded with information for generating driving directions; determining, at a second point in time later than the first point in time, whether the remote computer is accessible; if the remote computer is accessible, fetching, with the processor, a second plurality of map partition data for a second area from the remote computer at the second point in time, the second plurality of map partition data being encoded with information for generating driving directions, the second area being within a predetermined distance from a current location of the user device and partially intersecting the first area; storing the first plurality of map partition data and the second plurality of map partition data in a memory; determining, at a third point in time later than the second point in time, whether the remote computer is accessible; if it is determined that the remote computer is not accessible, assembling map data representing a geographic region, the map data being an assemblage of at least one of the first plurality of map partition data and the second plurality of map partition data stored in the memory; and generating a route to a destination using the map data.