摘要 |
Systems and methods of route guidance on a user device are provided. In one aspect, a system and method transmit (1302, 1305) partitions (701-703) of map data to a client device (150). Each map partition may contain road geometries, road names, road network topology, or any other information needed to provide turn-by-turn navigation or driving directions within the partition. Each map partition (701-703) may be encoded with enough data to allow them to be stitched together to form a larger map. Map partitions may be fetched along each route to be used in the event of a network outage or other loss of network connectivity. For example, if a user deviates (1307) from the original route and a network outage occurs, the map data may be assembled and a routing algorithm may be applied to the map data (1310) in order to direct the user back to the original route (1311). |
申请人 |
GOOGLE INC.;KALAI, ILJYA;ITO, KEITH;ULANOV, ANDREY, YURYEVICH;MILLER, ANDREW, TESCH;SILISKI, MICHAEL |
发明人 |
KALAI, ILJYA;ITO, KEITH;ULANOV, ANDREY, YURYEVICH;MILLER, ANDREW, TESCH;SILISKI, MICHAEL |