3D Infrastructure Model Transformation for Accurate Ellipsoid Visualization
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Solution Overview
Problem
Drawing 3D infrastructure design models in planar coordinate systems on an ellipsoidal coordinate system, such as WGS, results in inaccuracies due to the curvature of the ellipsoid, especially when integrating models from different sources and varying scales.
Innovation Solution
A method involving translation and transformation of 3D infrastructure design models to a common origin in planar cartesian coordinates, followed by conversion to ellipsoid cartesian coordinates using a reference frame, and employing a camera target point correction mechanism to ensure accurate rendering on an ellipsoidal surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If 3D infrastructure design models are drawn on an ellipsoidal coordinate system, then the models can be visualized on a global scale, but inaccuracies occur due to the models being originally designed in planar coordinate systems
Solution Approach 1:
The patent transforms the coordinate system parameters by converting from planar Cartesian coordinates to ellipsoidal coordinates using a camera target point and unit axis conversion. This parameter transformation allows models to be accurately represented on the ellipsoid surface while maintaining their original dimensional properties through mathematical coordinate conversion.
Solution Approach 2:
The patent introduces an intermediary transformation process that acts as a bridge between planar coordinate systems and the ellipsoidal coordinate system. This intermediary conversion mechanism, involving camera target point calculation and unit axis conversion, enables accurate integration of multiple models from different planar coordinate systems onto the global ellipsoidal framework.
2Adaptability or versatility
If multiple 3D infrastructure design models from different planar coordinate systems are integrated, then comprehensive visualization is achieved, but coordinate system incompatibility causes visualization errors
Solution Approach 1:
The patent creates a universal transformation framework that can handle multiple different planar coordinate systems and convert them to a common ellipsoidal coordinate system. This universal approach enables comprehensive integration of infrastructure models from various sources while maintaining accuracy through standardized coordinate conversion processes.
Solution Approach 2:
The patent applies parameter transformation to convert coordinates from multiple different planar coordinate systems into the ellipsoidal coordinate system. By changing the coordinate parameters through mathematical transformation, the system achieves reliable visualization of multi-source models without coordinate system incompatibility issues.
3Length of stationary object
If 3D infrastructure design models with substantial dimensions are drawn on an ellipsoid, then global scale visualization is achieved, but dimensional inaccuracies occur
Solution Approach 1:
The patent applies coordinate parameter transformation that preserves dimensional properties while adapting to the ellipsoidal surface. By converting planar coordinates to ellipsoidal coordinates through camera target point and unit axis conversion, the system maintains manufacturing precision even for models with substantial dimensions on a global scale.
Data Source
Figure 1a~1c
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Figure 2b
AI summary
Drawing 3D infrastructure design models, especially with substantial dimensions, on an ellipsoid coordinate system such as the WGS can cause inaccuracies when multiple 3D infrastructure design models are drawn. The invention is based on the idea carrying out transformations of 3D infrastructure design models of objects such as models of buildings or infrastructure or some other object, which are typically designed in planar coordinate systems i.e., having axis orthogonal against each other. Multiple 3D infrastructure design models can be drawn in the same view accurately.