| US 7,603,231 B2 | ||
| Navigation method and system having improved arrival detection function for large scale destination | ||
| Tommy Ogawa, Torrance, Calif. (US) | ||
| Assigned to Alpine Electronics, Inc., Tokyo (Japan) | ||
| Filed on Nov. 12, 2005, as Appl. No. 11/271,029. | ||
| Prior Publication US 2007/0112510 A1, May 17, 2007 | ||
| Int. Cl. G01C 21/30 (2006.01); G01C 21/00 (2006.01) | ||
| U.S. Cl. 701—209 [701/200] | 18 Claims |
| 1. A method of determining an arrival at a particular destination for use with a navigation system, comprising the following
steps of:
determining if a destination to be reached is associated with polygon data in map data where the polygon data shows a shape
of the destination or other place related to the destination;
performing a route guidance operation to guide a user to the destination through a calculated route;
checking whether a current user position has reached an arrival detection start range where the arrival detection start range
is a range that encompasses a whole shape of the destination or a range that derives from a particular shape of the destination
where the destination includes a place related to the destination which is represented by the polygon data;
checking whether any portion of the shape of the destination defined by polygon data comes within an arrival detection range
where the arrival detection range is a range defined by a predetermined distance from the current user position; and
notifying arrival at the destination when the current user position comes within the arrival detection start range and also
when any part of the shape of the destination comes within the arrival detection range.
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