Schematic Map Distortion for Small Display Readability
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Solution Overview
Problem
Electronic maps on handheld devices are constrained by small displays, making it difficult to visually extract useful information due to overcrowding with unnecessary details, which hinders user guidance and orientation.
Innovation Solution
Schematic maps are generated by analyzing map vector data to prioritize and display only the most relevant features based on display attributes, allowing for distortion to emphasize important areas and de-emphasize less important ones, thus optimizing map layout and presentation for the device's display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If more information is added to electronic maps, then the map contains more useful details, but the map becomes cluttered and harder to read on small displays
Solution Approach 1:
The patent applies local quality by differentiating the visual representation of map features based on their importance. Important features (route segments, key landmarks) are displayed with higher visual weight, larger size, and greater detail, while less important features are displayed with reduced visual weight or omitted entirely. This creates a non-uniform information density across the map that optimizes readability on small displays while preserving essential information.
Solution Approach 2:
The patent extracts and displays only the most relevant map features for the user's current task (navigation and orientation). By analyzing map vector data to identify essential features such as route segments, turns, and key landmarks, the system extracts this subset of information and presents it in a simplified schematic format, removing unnecessary details that would clutter the display.
2Loss of information
If the map displays all map features, then complete information is provided, but the small display cannot show all details clearly
Solution Approach 1:
The patent changes the parameter of information selection by applying a usefulness threshold to filter map features. Instead of displaying all features with uniform detail, the system evaluates each feature's usefulness for navigation and orientation, then adjusts which features are displayed and at what level of detail. This parameter-based filtering optimizes the balance between information completeness and display quality on small screens.
3Manufacturing precision
If the map adheres to geographic scale, then accurate spatial relationships are maintained, but important areas cannot be emphasized on small displays
Solution Approach 1:
The patent inverts the traditional approach to map scaling by abandoning strict geographic scale adherence in favor of a schematic representation. Instead of maintaining uniform spatial relationships, the system distorts the map to expand important areas (route segments, key landmarks) and compress or omit less important areas. This inversion prioritizes information visibility and user guidance over geometric accuracy, which is acceptable for navigation purposes.
Data Source
AI summary
Systems and methods for preparing and presenting schematic maps, which are maps that present information in a format that presents only information that is most relevant to a given situation in order to provide a simple and clear representation sufficient to aid a user in guidance or orientation. The schematic maps as described herein can be formatted based on the attributes of a display on which they are presented so that the map layout and presentation can be optimized for the particular display. The schematic maps can be “distorted” to better illustrate important maps areas in greater detail and using a relatively larger display area while deemphasizing less important map areas by illustrating them in less detail and using a relatively smaller display area, and thus the schematic maps can be devoid of adherence to a particular scale.