| 摘要 |
A method of providing navigation guidance information to a user of a portable electronic device includes uploading a track file to a server, the track file containing a plurality of waypoints that form a track, adding a plurality of navigation points to the plurality of waypoints to produce a modified track file, the plurality of navigation points providing navigation guidance to the user of the portable electronic device, and the plurality of navigation points containing data for creating a graphical depiction of intersections associated with the turn-by-turn navigation guidance. The method further includes downloading the modified track file to the portable electronic device, and providing bi-directional turn-by-turn navigation guidance to the user of the portable electronic device when the user reaches each of the plurality of navigation points as the user follows the path indicated by the modified track file. |
