Patent ID: 7269510

Claim:
Device for providing map information data interactively to a display unit operated by a user; the device comprising a processor and a memory comprising a multi-resolution map information database; the multi-resolution map information database comprising map information data representing geographical features, the map information data being based on aggregations of at least one of nodes, links and rings, each one of which corresponding to geographical features, offering a number of resolution levels, where the map information data of a higher resolution level comprises additional map information data, resulting in more detailed map information presented on the display unit, compared to the map information data of a lower resolution level, and the map information data of a higher resolution level being generated by enhancement of the map information data of a lower resolution level combined with the additional data, the enhancement being based on disaggregation of at least one of the nodes, links and rings; the processor being configured for: receiving from the user a request for map information data; providing to the display unit, in the case of the request being a first request, map in formation data at a predetermined resolution level and, in the case of the request being subsequent request, map information data at a higher resolution level.