Navigation device and method using map data correction files

摘要

A method of operating a PND or navigation system is described, together with a PND or navigation system for performing such a method. The PND or navigation system includes memory storing map data consisting of base map data files and supplemental corrective data files. In at least one embodiment, the method includes correlating the current location with the map data, and in the event that the current location and derived map data are seemingly at odds with one another, performing at least one secondary action. In at least one embodiment, the secondary action may be the issuing of an approve/reject prompt to the user, or the automatic creation, modification or deletion of a new or pre-existing correction. In a further aspect, at least one embodiment of the invention also provides for a PND or navigation system storing an indication of a home location, and prompting a user to visit nearby locations for which corrections exist, followed by prompted or automatic confirmation or rejection thereof.

主权项

1. A method of operating a navigation system of a vehicle including one or more base map data files to which have been applied one or more map data correction files containing both geospatial information and error identification information, which together form a basis for navigation, route guidance, and map information display on a display screen of the navigation system, the method comprising:
determining a current or home location of the navigation system and a distance of the current or home location from one or more locations geospatially identified in the map data correction files, and effecting at least one of alteration and qualification of the error identification upon or after receiving an affirmative user response to a prompt automatically output by the navigation system when the distance is less than a threshold and based on a vehicle-specific parameter, the prompt at least partially being representative of the error identification, wherein the vehicle-specific parameter is at least one of: vehicle type; vehicle size; and vehicle weight.