Display method of navi-server and navigation

• US 7,983,837 B2
• Filed: 01/09/2004
• Issued: 07/19/2011
• Est. Priority Date: 01/10/2003
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd., Xanavi Informatics Corporation (Hitachi, Ltd.)
• Original Assignee: Hitachi, Ltd., Xanavi Informatics Corporation (Hitachi, Ltd.)
• Inventors: Endo, Yoshinori, Matsuo, Shigeru, Fushiki, Takumi, Yamane, Kenichiro, Machii, Kimiyoshi, Yokota, Takayoshi, Fujiwara, Junsuke, Hiroshige, Hideo
• Primary Examiner(s): ARTHUR JEANGLAUDE, GERTRUDE
• Application Number:
  US10/753,408
• Publication Number:
  US 20050043880A1
• Time in Patent Office: 2,748 Days
• Field of Search: 701/23, 701/200, 701/207, 701/208, 701/212, 701/214, 701/300, 701/211, 340/988, 340/990, 340/995.13, 340/995.1, 342/357.01, 342/357.08
• US Class Current: 701/200
• CPC Class Codes: G01C 21/26 specially adapted for navigation in a road network
• CPC Class Codes: G01C 21/3694 Output thereof on a road map

Abstract

A navi-server which is provided with information from a traffic information providing center, and presents and provides information made on the information to a terminal is characterized by being equipped with a first storage means storing the information provided from the traffic information providing center; a traffic jam statistical making means which makes traffic jam statistical information including traffic jam information in a predetermined point and a predetermined zone as well as a reliability of the traffic jam information, based on information stored in the first storage means; and a second storage means storing information made by the traffic jam statistical making means, wherein the navi-server presents and provides the information stored in the second storage means to the terminal, based on a request of the terminal and at a predetermined timing.

Claims

1. A display method for a car navigation system which displays a position and proceeding direction of a user'"'"'s car on a road map and displays a guide route on the road map, the display method overlappingly displaying a graphic at a position on the road map corresponding to traffic jam statistical information,

wherein an area surrounded by said graphic depends on the traffic jam statistical information and a statistical reliability of the traffic jam statistical information,

wherein said statistical reliability is a rank classification depending on an evaluation of a repeatability of the traffic jam information, based on a standard deviation of said traffic jam information

wherein the standard deviation is obtained by;

a first step of removing a day of data in advance as abnormal data when a predetermined time or more in the day indicate a traffic jam;

a second step of removing data having a large deviation in advance as abnormal data when traffic jam information in a same time interval is compared for a plurality of days; and

a step of calculating each standard deviation of the traffic jam statistical information at a predetermined location where the abnormal data is removed by the first and second step, and

wherein said graphic has a perimeter that changes based on said statistical reliability.

2. A display method for a car navigation system according to claim 1, wherein the graphic is circular depending on the traffic jam statistical information, the method comprising the steps of:

separating an inside of the circle into sectors depending on a time zone, and classifying and displaying colors of the sectors depending on one of a traffic jam occurrence frequency and average traffic jam degree in the traffic jam statistical information.

3. A display method for a car navigation system according to claim 1 wherein said graphic is selected from the group consisting of

a solid line,

a dotted line,

a broken line, and

a dashed line.

4. A display method for a car navigation system according to claim 1, wherein the predetermined point is an intersection.

5. A display method for a car navigation system according to claim 1, wherein the predetermined location is a road zone between intersections.