Navigation system
A navigation system includes: a storage unit having stored therein roadmap data, first statistical traffic information data pertaining to a first area which are created based upon a first standard related to a time applicable to the first area, and second statistical traffic information data pertaining to a second area which are created based upon a second standard related to a time applicable to the second area; a search unit that searches for a recommended route; and an estimated time of arrival calculation unit that calculates an estimated time of arrival based upon the roadmap data, the first statistical traffic information data and the second statistical traffic information data. The estimated time of arrival calculation unit executes calculation processing of the estimated time of arrival in compliance with the first standard and the second standard.
1. A navigation system, comprising:
a search unit that searches for a route for a recommended route for a mobile body traveling from a start point located in a first mesh area to a destination in a second mesh area adjacent to the first mesh area, a first local standard time in the first mesh area and a second local standard time in the second mesh area being different from each other;
a storage unit in which a length of traveling time required to travel through each of the links present in the first mesh area and a length of traveling time required to travel through each of links present in the second mesh area are stored;
a determining unit that determines a departure time point at which the mobile body departs from the start point based upon the first local standard time;
an estimated passing time point calculation unit that calculates a first estimated passing time point at which the mobile body is expected to pass through a waypoint on the recommended route by adding a sum of lengths of traveling time required to travel through links present in the recommended route within the first mesh area in reference to the storage unit, to the departure time point, the waypoint being present at a border between the first mesh area and the second mesh area;
a conversion unit that converts the first estimated passing time point based upon the first local standard time to a second estimated passing time point based upon the second local standard time;
an estimated time of arrival calculation unit that calculates an estimated time of arrival at which the mobile body is expected to arrive at the destination based upon the second local standard time by adding a sum of lengths of traveling time required to travel through links present in the recommended route within the second mesh area in reference to the storage unit, to the second estimated passing time point; and
a display unit that brings up the estimated time of arrival.
2. A navigation system according to claim 1 , wherein:
the determining unit further determines a date of departure on which the mobile body departs from the start point based upon the first local standard time; and
the length of traveling time required to travel through each of links present in the first mesh area and the length of traveling time required to travel through each of links present in the second mesh area are stored in the storage unit in correspondence to individual day categories indicating specific day types.
3. A navigation system according to claim 1 , further comprising:
a decision making unit that makes a decision as to whether or not daylight saving time is applicable, wherein:
the determining unit determines the departure time point based upon the decision;
the estimated passing time point calculation unit calculates the first estimated passing time point based upon the decision;
the conversion unit converts the first estimated passing time point to the second estimated passing time point based upon the decision; and
the estimated time of arrival calculation unit calculates the estimated time of arrival based upon the decision.
4. A navigation system according to claim 1 , wherein:
the length of traveling time required to travel through each of links present in the first mesh area based upon the first local standard time and the length of traveling time required to travel through each of links present in the second mesh area are stored in the storage unit based upon the second local standard time.
5. A navigation system, comprising:
a search unit that searches for a route for a recommended route for a mobile body traveling from a start point located in a first mesh area to a destination in a second mesh area adjacent to the first mesh area, a first local standard time in the first mesh area and a second local standard time in the second mesh area being different from each other;
a storage unit in which a length of traveling time required to travel through each of links present in the first mesh area and the second mesh area are stored;
a determining unit that determines a first departure time point at which the mobile body departs from the start point based upon a global standard time by converting a second departure time point at which the mobile body departs from the start point based upon the first local standard time to the first departure time point;
an estimated time of arrival calculation unit that calculates a first estimated time of arrival at which the mobile body is expected to arrive at the destination based upon the second local standard time by adding a sum of lengths of traveling time required to travel through links present in the recommended route within the first mesh area and the second mesh area in reference to the storage unit, to the first departure time point and that converts the first estimated time of arrival to a second estimated time of arrival at which the mobile body is expected to arrive at the destination based upon the global standard time; and
a display unit that brings up the second estimated time of arrival.
6. A navigation system according to claim 5 , wherein:
the determining unit further determines a first date of departure on which the mobile body departs from the start point based upon the global standard time by converting a second date of departure on which the mobile body departs from the start point based upon the first local standard time to the first date of departure; and
the length of traveling time required to travel through each of links present in the first mesh area and the length of traveling time required to travel through each of links present in the second mesh area are stored in the storage unit in correspondence to individual day categories indicating specific day types.
7. A navigation system according to claim 5 , further comprising:
a decision making unit that makes a decision as to whether or not daylight saving time is applicable, wherein:
the determining unit determines the first departure time point based upon the decision;
and the estimated time of arrival calculation unit converts the first estimated time of arrival to the second estimated time of arrival based upon the decision.
8. A navigation system according to claim 5 , wherein:
the length of traveling time required to travel through each of links present in the first mesh area and the second mesh area are stored in the storage unit based upon the global standard time.