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Geological surface reconstruction from 3D point clouds.

Cristina Serazio1, Marco Tamburini2, Francesca Verga1

  • 1Department of Environment, Land and Infrastructure Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino 10129, Italy.

Methodsx
|August 25, 2021
PubMed
Summary
This summary is machine-generated.

This study presents a new method for reconstructing 3D geological surfaces from point clouds. The approach enables accurate triangulation, crucial for generating detailed underground rock models for simulations.

Keywords:
Best fitting planeConcave hullDelaunay TriangulationGeological surface

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Area of Science:

  • Geosciences
  • Computational Geology
  • Computer-Aided Design

Background:

  • Numerical simulations of subsurface fluid flow and rock deformation rely on geological models.
  • These models are constrained by stratigraphic surfaces and faults, then discretized into blocks with assigned properties.

Purpose of the Study:

  • To illustrate a method for reconstructing the triangulation of 3D geological surfaces from point cloud data.
  • To enable the generation of underground rock models for simulation purposes.

Main Methods:

  • Characterization of the best-fitting plane for point cloud data.
  • Identification and projection of the concave hull onto the best-fitting plane.
  • Constrained triangulation of the point cloud using the concave hull and Planar Straight Line Graph (PSLG).

Main Results:

  • Successful reconstruction of 3D geological surfaces from point clouds.
  • The developed algorithm, implemented in C++, provides a robust method for surface triangulation.
  • The algorithm's two parameters (nDig, maxCut) allow for adaptable refinement of the concave hull.

Conclusions:

  • The presented method facilitates the creation of accurate geological models from point cloud data.
  • This technique is valuable for improving the fidelity of subsurface simulations.
  • The algorithm offers an efficient and parameter-driven approach to geological surface reconstruction.