Map Display System Highlighting Updated Road Segments
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Solution Overview
Problem
Conventional map display systems fail to distinguish between earlier and later updated map data portions effectively as updates accumulate, leading to indiscernibility and increased complexity in managing update history.
Innovation Solution
A map display system that assigns identifiers to updated segment data for discernible display, with a mechanism to revert to normal display after predetermined time periods or cumulative display times, ensuring only recently updated data is highlighted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If map data are repeatedly updated and all updated portions are displayed in a discernible form, then users can identify update history, but the display becomes complex and earlier and later updated portions become indiscernible from each other
Solution Approach 1:
The patent applies local quality by differentiating display characteristics based on the temporal proximity of updates. Recently updated segment data is displayed with distinctive markers (such as different colors or highlighting) while older updated portions are displayed with normal characteristics. This allows the system to maintain update history information without making the entire display complex, as only the locally relevant recent updates are emphasized.
Solution Approach 2:
The patent implements dynamics by making the display characteristics time-dependent. The discernible display form for updated portions is not static but dynamically adjusts based on the elapsed time since the update. After a predetermined time period, the distinctive markers are removed and the display reverts to normal form. This dynamic behavior allows the system to adapt the display complexity based on the recency of updates.
2Loss of information
If all updated segment data are permanently marked with identifiers, then update history is clearly visible, but the display form cannot return to usual appearance and user attention is not efficiently directed
Solution Approach 1:
The patent applies periodic action by implementing a time-based mechanism that temporarily activates the discernible display form for updated portions. The distinctive markers are displayed only during a predetermined time period after the update, after which they are automatically removed. This periodic display ensures that update history is visible when relevant while allowing the display to return to its usual appearance, thereby efficiently directing user attention to recent changes without permanently altering the display.
Data Source
AI summary
A highlight display flag is assigned to a link datum having undergone addition or modification when road map data are updated. A road corresponding to a link datum assigned with the highlight display flag is displayed in a highlight display form. When the highlight display form for the corresponding road is determined to be unnecessary in consideration of (i) an elapsed time period posterior to the update or (ii) a cumulative display time period, the highlight display form is returned to a usual display form.