Electronic Map Display Priority Control for Rapid Range Changes
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Solution Overview
Problem
Conventional electronic map display systems are inefficient due to the need for frequent redrawing of all target objects when changing the display range, leading to delays and inconvenience in finding a user's location, as they either display excessive information or require multiple scale changes, which can result in missing important details outside the current view.
Innovation Solution
An electronic map display system that assigns display priorities to objects, prioritizing anchor objects for quick location identification and displaying them first, followed by data objects, while controlling the display time to ensure the user sees at least one target object during rapid range changes, using a decision unit to determine a boundary for updating the display range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If all target objects are displayed within the display range when changing display range, then complete information is provided, but display time delay increases due to redrawing all objects
Solution Approach 1:
The patent segments target objects into different types (e.g., important landmarks vs. other objects) and applies different display strategies to each segment. High-priority objects are always displayed within the display range, while lower-priority objects are conditionally displayed based on available time and screen space, thus reducing overall redraw time while maintaining essential information completeness.
Solution Approach 2:
The patent extracts and prioritizes critical target objects (such as important landmarks) from the complete set of target objects. These extracted high-priority objects are guaranteed to be displayed, while the remaining objects are selectively displayed based on time and space constraints, thereby ensuring essential information is never lost while minimizing display time.
2Loss of time
If scale is enlarged to show detailed view, then display time for objects is reduced, but user cannot immediately browse other positions on the map
Solution Approach 1:
The patent implements a dynamic display system where the display range and scale can be flexibly adjusted based on user interaction and time constraints. The system dynamically determines which objects to display at what scale, allowing users to switch between detailed views and broader map views without fixed limitations, thus maintaining both fast display performance and browsing convenience.
Solution Approach 2:
The patent employs periodic updates of the display range and scale based on user interactions such as scrolling or zooming commands. The system periodically refreshes the display with updated object sets appropriate to the current view, allowing users to browse different map positions efficiently while maintaining optimal display performance for each view type.
3Loss of information
If multiple scale changes are required to find position, then detailed information is preserved, but user convenience deteriorates due to multiple actions required
Solution Approach 1:
The patent performs preliminary organization and prioritization of target objects before display, categorizing them by importance and type. This preliminary classification allows the system to quickly determine which objects should be displayed at what scale without requiring multiple user actions, thus preserving detailed information while improving user convenience through automated intelligent display selection.
Data Source
AI summary
An electronic map display method is disclosed. The method includes: providing an electronic map file having a plurality of objects where each object has an attribute; and comparing a plurality of attributes corresponding to a plurality of target objects included within a display range to control a display order with respect to the target objects for displaying the target objects.