Digital map of traffic route network with temperature data has route data relating to traffic route network, attribute data including temperature data for air and/or for road surface

摘要

The digital map (50) has route data relating to a traffic route network that can be traveled and associated attribute data, whereby many attribute data items include past attribute data in addition to current attribute data. The attribute data include temperature data for the air and/or for the road surface. The digital map is updated using a sampling vehicle. AN Independent claim is also included for the following: a method of generating vehicle navigation information.