Electronic Map Display Topology Correction for Scale Switching
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Solution Overview
Problem
Existing electronic map display technologies face issues with cracks and deformities when downsizing map data from large to small scales, leading to inaccurate representations of map elements, particularly affecting important features like rivers.
Innovation Solution
A method that generates second map data by deleting specific spatial points from first map data and processes it based on neighboring relations to eliminate cracks between adjacent map elements, using a server to correct and send the processed data to the electronic device for accurate display at different scales.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automatic downsizing of map data is used to obtain small-scale electronic maps from large-scale maps, then the productivity of map generation is improved, but the manufacturing precision deteriorates due to cracks and deformities in background surfaces
Solution Approach 1:
The patent applies preliminary action by pre-establishing the neighboring relation set before downsizing occurs. This set stores the topological relationships between map elements at the original scale, which are then used to guide the downsizing process and ensure that adjacent elements remain properly connected in the scaled-down version, preventing cracks and deformities
Solution Approach 2:
The patent uses parameter changes by adjusting the spatial points representation of map elements during downsizing. Instead of simply reducing resolution, the system selectively removes or merges spatial points while maintaining the topological relationships defined in the neighboring relation set, thereby preserving background surface integrity at different scales
2Productivity
If spatial points are deleted from map data to reduce scale, then the productivity of map data processing is improved, but the reliability deteriorates due to loss of spatial information and creation of cracks
Solution Approach 1:
The patent implements feedback by continuously referencing the neighboring relation set during the downsizing process. As spatial points are deleted or modified, the system checks against the stored topological relationships to ensure that adjacent map elements remain properly connected, providing corrective guidance that maintains spatial relationship accuracy
Solution Approach 2:
The system performs preliminary action by pre-calculating and storing the neighboring relations before downsizing begins. This preparation allows the downsizing process to proceed efficiently while ensuring that spatial relationships are preserved, as the pre-established relationship data guides which points can be safely removed
Data Source
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AI summary
The present application discloses a method for displaying an electronic map, an electronic device, a readable storage medium and a computer program product, and relates to the technical field of electronic maps, intelligent transportation, automatic driving, artificial intelligence technologies, etc. The specific implementation scheme is: after receiving a downsizing instruction from an electronic device, a server generates second map data under a second scale according to first map data under a first scale, and obtains third map data by repairing the second map data according to a neighboring relation of map elements, and the third map data is configured to eliminate a crack between adjacent map elements in the plurality of map elements contained in the second map data. After receiving the third map data, the electronic device renders and displays the electronic map in the second scale. In this way, a purpose of correctly displaying the electronic map when switching between different scales can be realized by automatic topology correction.