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Method for switching reference map data in navigation device, and computer readable medium for the same

A technology of map data and navigation devices, which is applied to road network navigators and other directions, and can solve problems such as user inconvenience

Active Publication Date: 2015-02-18
DENSO CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, it is inconvenient for the user

Method used

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  • Method for switching reference map data in navigation device, and computer readable medium for the same
  • Method for switching reference map data in navigation device, and computer readable medium for the same
  • Method for switching reference map data in navigation device, and computer readable medium for the same

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Experimental program
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Embodiment Construction

[0018] The method of switching map data will be explained. figure 1 A navigation device 10 is shown.

[0019] The navigation device 10 includes a main body 20 of the navigation device and a map storage medium 30 as a map data storage.

[0020] The main body 20 includes a microcomputer, a display and a GPS receiver. The microcomputer includes CPU, ROM, RAM, I / O unit and a bus, and the bus couples the CPU, ROM, RAM and I / O unit. The ROM stores programs for executing various processes of the navigation device 10 . Depending on the program, the CPU, etc. executes a specific calculation process. Thus, the navigation device 10 provides various navigation information. For example, the device 10 displays the current location of the vehicle detected by the GPS receiver on a road map. Optionally, the device 10 can change the map scale of the road map. In addition, the device 10 scrolls the road map according to the user's instruction. Optionally, the navigation device 10 conducts...

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Abstract

A method for switching a reference map data in a navigation device having a map data memory for storing a plurality of map data, the navigation device executing a navigation function with using a first map data among the plurality of map data stored in the map data memory as the reference map data, the method includes: reading out a second map data from a memory medium; determining whether the map data memory already stores a same map data as the second map data; and switching the reference map data from the first map data to the same map data as the second map data when the map data memory already stores the same map data as the second map data in the memory medium.

Description

technical field [0001] The present invention relates to a method for switching reference map data in a navigation device. Map data is stored in a storage medium arranged in the navigation device. In addition, the computer-readable medium includes instructions that provide a method of switching reference map data in a navigation device. Background technique [0002] As described in JP-A-2004-272532, a rewritable storage medium such as a hard disk drive is used in an in-vehicle navigation device. The storage medium stores map data and the like. [0003] As for map data, new map data is periodically formed in order to update new road information. When updating the map data in the navigation device to a new version of the map data, the new version of the map data is overwritten on the storage area of ​​the old version of the map data in a rewritable storage medium such as a hard disk drive. As a result, the old version of the map data is replaced by the new version of the ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/30
CPCG01C21/32G01C21/3859
Inventor 田边敦渡边和纪长濑健儿熊谷哲男
Owner DENSO CORP