Longitudinal Section Creation from 3D Point Cloud Data
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods cannot create a longitudinal section along a curved road from three-dimensional point group data, limiting their applicability to terrain and structure surveys.
Innovation Solution
A method involving the designation of interval points on an X-Y plane to project Z points onto vertical virtual planes corresponding to an arbitrary longitudinal section creation line, allowing for the creation of a longitudinal section along any line, including curved roads, using a survey data processing device and system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the general method of creating longitudinal section from terrain map is used, then the process is simple and familiar, but it cannot create longitudinal sections along curved roads
Solution Approach 1:
The curved road is divided into multiple intervals by designating interval designation points along the road. Each interval is processed separately by projecting Z points onto corresponding vertical virtual planes, allowing the complex curved road longitudinal section to be constructed from multiple manageable segments that are then assembled together
Solution Approach 2:
The method transitions from traditional two-dimensional terrain map processing to three-dimensional point group data processing. By utilizing the Z dimension (altitude) in addition to X-Y coordinates, the system can accurately represent and display longitudinal sections along arbitrary curved paths in three-dimensional space
2Adaptability or versatility
If three-dimensional point group data is processed to create longitudinal section along arbitrary line, then curved road longitudinal sections can be created, but the processing complexity increases
Solution Approach 1:
The processing system is designed to handle arbitrary longitudinal section lines including both straight and curved paths. The same projection methodology works for any line type, making the system universal and eliminating the need for separate processing methods for different road geometries
Solution Approach 2:
The method creates virtual planes that are mathematical copies of the three-dimensional space along the longitudinal section line. By projecting points onto these virtual planes, the system preserves the geometric relationships and altitude information while creating a simplified two-dimensional representation for display
Data Source
AI summary
Provided is a method of creating a longitudinal section along an arbitrary line from three-dimensional point group data of terrain or a structure, and a survey data processing device and a survey system for the same. The method includes (a): setting an arbitrary longitudinal section creation line by sequentially designating a plurality of interval designation points on an X-Y plane of three-dimensional point group data (X, Y, Z), (b): projecting a Z point surveyed between a start point and an end point of a certain interval among a plurality of intervals defined by the interval designation points, onto a vertical virtual plane including the longitudinal section creation line, corresponding to (X, Y) coordinates of the longitudinal section creation line, and (c): performing the step (b) for all of the intervals.