Navigation System POI Presentation Range Determination
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Solution Overview
Problem
Conventional navigation systems fail to accurately display Point of Interest (POI) information by not considering the road environment and actual position of POIs, leading to user inconvenience due to differences between predicted and actual travel times.
Innovation Solution
A navigation system that automatically sets the presentation of POI information at predetermined timings by determining a presentation target range centered on the POI, using node and link data to specify the most direct route and display POI information when the vehicle enters this range, thereby improving user convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If POI information is displayed based on uniform distance from current position, then display simplicity is maintained, but accuracy of travel time prediction deteriorates
Solution Approach 1:
The patent applies local quality by determining presentation target ranges individually for each POI based on their specific road environments, rather than using a uniform display approach. Each POI receives a customized presentation range calculated from its nearest link and node characteristics, ensuring accurate travel time prediction while maintaining display simplicity through automated determination.
2Quantity of substance
If POI information is displayed within predetermined distance from current position, then user can see nearby POIs, but user convenience deteriorates due to mismatch between predicted and actual travel time
Solution Approach 1:
The patent changes the parameter from fixed uniform distance to variable presentation target ranges. Each POI's presentation range is dynamically determined based on road environment parameters (nearest link distance, node positions, traveling direction), allowing the system to display the appropriate number of POIs while accurately reflecting actual travel conditions, thus improving user convenience.
3Ease of operation
If automatic presentation timing is set for each POI, then user convenience is improved, but system complexity increases
Solution Approach 1:
The system implements self-service by automatically determining presentation target ranges and timing for each POI based on pre-stored map data (node and link information) and current vehicle position. The automated calculation using nearest link and node determination eliminates manual configuration needs, improving user convenience while keeping system complexity manageable through rule-based automatic processing.
Data Source
AI summary
A map information navigation system includes: a storage unit that stores POI data including point data about a POI, node data of nodes set on roads in advance, and link data of links connecting neighboring nodes; a specification unit that specifies one link located at a shortest distance from the POI among the links for each of a plurality of directions; a determination unit that sets one of the nodes included in the specified links as a specific point and determines a predetermined area centered on the POI and passing through the specific point as a presentation target range of map information; an acquisition unit that acquires current position information indicating a current position; and a presentation unit that presents POI data including the point data about the POI with entrance of the current position into the presentation target range as a trigger.