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Extraction and visualization of orientation data from virtual geologic surfaces with MATLAB®.

Avery J Welker1, John P Hogan1, Andreas Eckert1

  • 1Department of Geosciences and Geological and Petroleum Engineering, Missouri University of Science and Technology, Rolla, MO, USA.

Methodsx
|December 5, 2019
PubMed
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This study introduces a MATLAB script for extracting geologic attitude data from 3D point clouds. This tool aids in analyzing spatial relationships of rock surfaces, especially in areas with limited exposure.

Area of Science:

  • Geology
  • Geophysics
  • Computational Geoscience

Background:

  • 3D point cloud technologies enable high-resolution surface visualization.
  • Analyzing spatial relationships of geologic surfaces requires orientation data.
  • Interpreting graphical plots from natural folded rock surfaces can be challenging.

Purpose of the Study:

  • To present a MATLAB script for deriving planar geologic attitude data from 3D datasets.
  • To facilitate the analysis of spatial relationships using orientation data.
  • To aid in the interpretation of geological data from folded rock surfaces.

Main Methods:

  • Utilizing Cartesian coordinates of triangular planar surfaces from 3D datasets.
  • Converting surface data into conventional geologic attitude matrices (strike, dip, dip-direction).
Keywords:
Planar data visualizationPolar tangent diagramStereographical analysisStructural geologyUsing MATLAB® to extract and visualize planar geologic attitudes from point-based data

Related Experiment Videos

  • Employing polar tangent diagrams, stereographic analysis, and geologic curvature analysis for spatial investigation.

    • Main Results:

    • The script generates attitude data (strike, dip, dip direction) in spreadsheet and text file formats.
    • A tangent diagram is created for rapid visualization and fold shape assessment.
    • Synthetic graphical plots from virtual folded surfaces aid in interpreting real-world data.

    Conclusions:

    • The developed MATLAB script provides a valuable tool for quantitative analysis of geologic surfaces.
    • The script enhances the interpretation of attitude data, particularly for poorly exposed or complex geological structures.
    • The script's flexibility in data input and output formats increases its applicability in various geological studies.