Patent ID: 7003397

Claim:
An off-road trail recording method for navigation system, comprising the following steps of: detecting whether a user or user's vehicle (hereafter “vehicle”) has left a road and entered an off-road area where no road segments data are available; recording off-road trail data in a background recording mode without displaying the off-road trail in response to vehicle's travel in the off-road area when detecting that the vehicle has left the road; prompting the user to select whether to recover or delete the off-road trail data recorded in the background recording mode indicating the off-road trail connecting the road left off and a current vehicle position when a normal recording mode is activated; and recording off-road trail data and displaying the off-road trail data on a screen of the navigation system in the normal recording mode in response to vehicle's travel in the off-road area; wherein the background recording mode is activated automatically when detecting that the vehicle has left the road, and the normal recording mode is activated by the user by turning on an off-road trail recording function of the navigation system.