Importance

Loading Importance Indicators...

Abstract

An electronic map system obtains a vehicle's GPS fix from a GPS receiver and compares the fix with nearby map features such as road segments. Due to GPS inaccuracies, several such map features may correspond to a GPS fix. To determine which map feature should be shown as the location of the vehicle on the electronic map, the system infers a best fit among the map features that are close to the GPS fix by considering both distance and inferred characteristics of each map feature, such as prior GPS fixes and typical vehicle direction and speed on such feature. Some of these characteristics may be retrieved from a database and may be based on historical observations while others may be obtained in real time, for instance from on-board vehicle sensors.

Loading the Abstract Image...

First Claim