Portable Navigation Device Map Correction via Graphical Indicators
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Solution Overview
Problem
Modern portable navigation devices (PNDs) face challenges in updating and correcting map data in real-time, particularly in dynamic environments like city centers, where user corrections are often forgotten or difficult to input safely while driving.
Innovation Solution
A method is introduced to display user-selectable graphical indicators on the map representing travel restrictions, allowing users to easily correct and store changes directly on the device, which are then reflected in route calculations and displayed during navigation, even in 3D mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If users are required to input map data corrections manually through menu structures, then correction accuracy can be improved, but the ease of operation deteriorates and users may forget to input corrections
Solution Approach 1:
The correction interface is segmented into contextual layers: the map display layer shows graphical indicators at intersection points, and the correction input layer is activated only when users interact with specific indicators. This segmentation allows accurate correction data entry while maintaining easy operation during normal navigation.
Solution Approach 2:
Potential correction points are pre-identified and marked with graphical indicators on the map display before users need to make corrections. The system proactively presents correction opportunities at relevant intersection points, eliminating the need for users to search through menus or remember to make corrections later.
2Reliability
If the device provides comprehensive route calculation and navigation functions, then the reliability of navigation is improved, but the device complexity increases
Solution Approach 1:
The navigation system performs self-updates by automatically incorporating user corrections into route calculations. When users interact with graphical indicators to make corrections, the system immediately integrates these corrections into the navigation database and adjusts subsequent routing, eliminating the need for complex manual database management or post-trip data uploads.
3Productivity
If map data corrections are stored locally on the device, then the productivity of navigation updates is improved, but the loss of information may increase if corrections are not uploaded
Solution Approach 1:
The system performs preliminary local storage of corrections in the navigation database, ensuring immediate availability for routing decisions. Corrections are stored locally with high priority and automatically applied to subsequent route calculations, ensuring no information loss while enabling rapid update productivity.
Data Source
AI summary
A method of correcting map data stored on a portable navigation device or navigation system is described, together with an appropriately enabled device or navigation system. A computer program enabling the method is also described. The method includes the steps of displaying map data on a PND or navigation system during a navigation or free-driving mode, and is characterized in that at least one of a plurality of user-selectable graphical indicators is displayed together with said map data adjacent or overlaid on the particular thoroughfare along which the device is currently traveling, the indicator graphically representing a travel restriction pertinent to one of either the current thoroughfare or a subsequent thoroughfare occurring after a thoroughfare intersection towards which the current thoroughfare leads.