Patent ID: 9267803
Filing Date: 2016-02-23
CPC Classification: G01C,G06F,H04L

Claim Text:
1. A method of generating a route to a destination comprising: prefetching, with a processor, a plurality of map partition data from a remote computer at a first point in time, each of the plurality of map partition data being encoded with information for generating driving directions for a first area corresponding to one or more map image tiles, wherein the first area includes a first sub-map area and a second sub-map area, wherein it is known that network connectivity in the first sub-map area is weaker than network connectivity in the second sub-map area, and more map partition data is prefetched for the first sub-map area than for the second sub-map area based on the respective connectivity; storing the plurality of map partition data in a memory; determining whether the remote computer is accessible; assembling, with the processor, map data representing a geographic region, the map data being an assemblage of map partition data of the stored plurality of map partition data stitched together to form a larger map from the one or more map image tiles if it is determined that the remote computer is not accessible; and generating, with the processor, a route to a destination using the map data.