Hybrid Map Projection Method Reducing Distortions
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Solution Overview
Problem
Conventional map projection techniques, such as UTM and conical projections, suffer from significant distortions and inaccuracies, particularly at boundaries and for large areas, which compromise the precision and reliability required in civil engineering and urban planning tasks.
Innovation Solution
A method that combines first and second intermediate data sets generated by different projection methods, such as oblique Lambert and oblique stereographic projections, to create a projected map, allowing for improved accuracy and reduced distortions by using a weighting factor to combine the data sets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional map projection techniques (UTM, conical projections) are used, then the projection process is simple and well-established, but significant distortions and inaccuracies occur, particularly at boundaries and for large areas
Solution Approach 1:
The patent combines multiple map projection techniques (first projection method and second projection method) into a hybrid projection system. The first intermediate data from the first projection method and the second intermediate data from the second projection method are merged using a weighting factor to produce the final projected map, thereby reducing distortions and improving accuracy while maintaining practical usability
Solution Approach 2:
The patent introduces a weighting factor as a可调 parameter to control the contribution of each projection method to the final result. By adjusting this parameter, the system can optimize the balance between different projection methods to minimize distortions for specific application scenarios, thereby improving measurement precision without excessive complexity
2Reliability
If projection parameters of one central zone are used at boundaries and adjacent zones, then the projection process remains simple, but errors and distortions accumulate over zone borders
Solution Approach 1:
The patent applies different projection methods or weighting factors to different regions of the map. By tailoring the projection parameters locally rather than using uniform parameters across all zones, the system maintains high reliability at boundaries and for large areas without requiring a completely complex multi-zone projection system
3Manufacturing precision
If traditional projection techniques are used for large areas, then the projection method is straightforward, but the required precision and reliability for civil engineering and urban planning tasks are not achieved
Solution Approach 1:
The patent merges the advantages of different projection methods by combining their intermediate data. This hybrid approach achieves the high precision required for civil engineering and urban planning applications while keeping the overall system complexity manageable through a systematic combination process
Data Source
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AI summary
A map projection method is disclosed comprising the steps of projecting surface data using a first projection method, thereby generating first intermediate data, projecting the surface data using a second projection method, thereby generating second intermediate data, and combining the first and second intermediate data to generate a projected map. Furthermore, an apparatus for map projections comprising storage means for storing surface data, and one or more processing units connected to the storage means for projecting the surface data using a first projection method to generate first intermediate data, for projecting the surface data using a second projection method to generate second intermediate data, and for combining the first and second intermediate data to generate the projected map is disclosed.