Dynamic Reference Longitude for Local Coordinate Transformation
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Solution Overview
Problem
Existing methods for transforming global position information into a local coordinates system, such as those used in vehicle-to-X applications, suffer from distortion errors as the distance from Greenwich increases, limiting their universal applicability.
Innovation Solution
Selecting a reference longitude near the position to be converted and using a Cartesian local coordinates system with axes parallel to latitude and longitude, allowing for accurate position representation without significant computational cost, even at larger distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If global position information is transformed using a fixed reference longitude (Greenwich), then the transformation method is simple and universally applicable, but distortion errors increase as distance from Greenwich increases
Solution Approach 1:
The reference longitude is made dynamic rather than fixed. The system automatically selects an optimal reference longitude based on the position being transformed, typically choosing a longitude near the position of interest. This dynamic adaptation allows the transformation to maintain high accuracy across different geographical locations while preserving the simplicity of the transformation method.
2Area of stationary object
If the distance from Greenwich increases, then the coverage area expands, but distortion errors occur during transformation
Solution Approach 1:
The transformation method applies local quality by selecting different reference longitudes for different regions. Instead of using a single global reference point, the system chooses a reference longitude that is locally optimal for each transformation operation, typically near the position being transformed. This ensures high transformation accuracy locally while allowing the system to handle global coverage by adapting the reference point accordingly.
Data Source
AI summary
A method for the transformation of information relating to at least one position on a globe from a first global coordinates system into a second local coordinates system, where the position in the first global coordinates system is provided by information relating to the longitude and a latitude, and the position in the second local coordinates system is provided in terms of two axes arranged orthogonally to one another. The method includes receiving a signal containing information relating to the position by means of an antenna, determining a first distance (x) between the position and a reference longitude for the first local axis using a calculation unit, and determining a second distance (y) between the position and a reference latitude for the second local axis by means of the calculation unit. The reference longitude is selected in such a way that it is near to the position.