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Information terminal device and map information providing system

A technology of information terminals and map information, applied to road network navigators and other directions, can solve the problems of increased data transmission time and cost, large map data capacity, etc., and achieve the effect of widening the range and reducing capacity

Inactive Publication Date: 2002-10-23
PANASONIC CORP
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  • Abstract
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Problems solved by technology

[0028] Furthermore, in the map providing system described in the above-mentioned second prior art, the map data sent from the center station to the terminal device is also based on the above-mentioned data structure, so there is a problem that the map sent from the center station to the terminal device The data capacity is large, and the time and cost required for data transmission increase

Method used

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  • Information terminal device and map information providing system
  • Information terminal device and map information providing system
  • Information terminal device and map information providing system

Examples

Experimental program
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Embodiment Construction

[0058] (first embodiment)

[0059] [device configuration]

[0060] Fig. 1 is a block diagram showing the hardware configuration and the functional configuration formed by executing a program of an information terminal device according to the first embodiment of the present invention. The information terminal device 1 is typically realized by a dedicated car navigation device for vehicles or a general-purpose PDA (Personal Digital Assistants). In addition, the above-mentioned program may be contained in an appropriate storage medium, and the above-mentioned program may be installed in another information terminal device, and the same function may be transplanted.

[0061] In FIG. 1, the information terminal device 1 is provided with a first input unit 11, a position detection unit 12, a first arithmetic processing unit 13, a data storage unit 15, a first data readout unit 18, a connection information generation unit 17 and a first output Unit 16.

[0062] For example, when t...

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Abstract

The information terminal device (1) of the present invention is provided with a first input unit (11), a position detection unit (12), a first arithmetic processing unit (13), a data storage unit (15), and a first data readout unit (18) , a connection information generation unit (17) and a first output unit (16). The map data stored in the data storage unit (15) has a data structure in which connection information between nodes and line segments constituting the road network is omitted in a recoverable form. The connection information generation unit (17) supplements the map data to generate the connection information, and the first arithmetic processing unit (13) uses the connection information generated by the connection information generation unit (17) to perform route search. and position detection processing and other data processing.

Description

technical field [0001] The present invention relates to an information terminal device and a system for providing map information, in particular to an information terminal device and a system for providing map information that use digital map data for processing such as map display, position detection, route exploration, and road guidance. Background technique [0002] (the first prior art) [0003] In recent years, vehicles equipped with navigation systems have been increasing. Such a conventional navigation system incorporates a map storage device having a read-only mass storage medium such as a CD-ROM or DVD-ROM. In addition, the terminal device for realizing the above-mentioned navigation system may be realized by a general-purpose information processing device (PDA: Personal Digital Assistants) or the like in addition to a terminal device dedicated to the navigation system. Map data for presenting to the user is pre-recorded on these storage media. The storage device...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/26
CPCG01C21/26
Inventor 中野信之岩见良太郎金铜刚史
Owner PANASONIC CORP
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