| 摘要 |
The present invention provides a technique for enabling collection and/or refinement of digital map information for aiding navigation route planning for vehicles larger than ordinary cars, such as goods-vehicles, buses, and car+caravan combinations. A profile of a vehicle's characteristics, and one or more routes followed, are logged by a navigation device (200), and fed-back to a server (150) that supports the navigation device with map data updates. At the server, or an alternative processing centre, the fed-back data from plural navigation devices is analysed (400-404) to observe statistically the patterns of roads used by these vehicles, and to categorise these by the type of vehicle. |
