Selective Map Area Update via Visual Indicators
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Solution Overview
Problem
Existing mobile vehicle navigation systems do not efficiently update map data, leading to outdated information and requiring users to update entire maps, which is inefficient and wasteful, as users typically only need updates for specific areas.
Innovation Solution
A mobile vehicle navigation method and apparatus that receives and displays updated area information graphically or via voice, allowing users to selectively update only the required areas by comparing map data versions and requesting updates only through a wireless communication network, generating graphic information with identifiers for changed areas on map background, search, and road networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If entire map data is updated, then navigation information is current, but data transmission time and network bandwidth are wasted
Solution Approach 1:
The map data is segmented into multiple update areas, each representing a distinct geographic region that can be independently updated. The server divides the map into grid-based segments and only transmits segments that contain changes, allowing selective updates rather than requiring complete map replications.
Solution Approach 2:
The system extracts and transmits only the changed portions of map data rather than the entire dataset. By identifying and extracting specific update areas where modifications occurred, the system sends minimal necessary data to keep navigation information current while avoiding unnecessary data transmission.
2Reliability
If entire map data is updated, then navigation information is current, but network bandwidth is wasted
Solution Approach 1:
The map data is segmented into multiple update areas, each representing a distinct geographic region that can be independently updated. The server divides the map into grid-based segments and only transmits segments that contain changes, allowing selective updates rather than requiring complete map replications.
Solution Approach 2:
The system extracts and transmits only the changed portions of map data rather than the entire dataset. By identifying and extracting specific update areas where modifications occurred, the system sends minimal necessary data to keep navigation information current while avoiding unnecessary data transmission.
3Productivity
If users can identify changed areas visually, then update selection is efficient, but display complexity increases
Solution Approach 1:
The system uses color-coded visual indicators to represent different types of map updates. Changed areas are displayed with distinct colors or graphical markers that indicate the nature of changes (e.g., new roads, modified landmarks), allowing users to quickly identify and select update areas without complex interfaces or multiple configuration steps.
Data Source
AI summary
A method and device for updating map data of a navigation device. The method includes receiving information relating to an area update of the map data from a data server via a wireless broadcast to the navigation device; and displaying the information in graphical form on a map displayed on a display screen. The method may further include receiving a user input selecting an area on the map corresponding to the area update; wirelessly transmitting the area as an area selection to the data server; wirelessly receiving updated map information corresponding to the selected area from the data server; and loading the received updated map information into the navigation device.