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A Self-Assembly Portable Mobile Mapping System for Archeological Reconstruction Based on VSLAM-Photogrammetric

Pedro Ortiz-Coder1, Alonso Sánchez-Ríos2

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This study introduces a low-cost, self-assembly 3D point cloud data capture device for non-specialized users. The system achieves accurate 3D modeling for applications like Building Information Modeling (BIM), meeting industry standards.

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Area of Science:

  • Geosciences
  • Engineering
  • Computer Science

Background:

  • Three-dimensional (3D) models are crucial in various fields, including engineering and cultural heritage.
  • Emerging needs like Building Information Modeling (BIM) require accessible 3D data capture solutions.
  • Current devices often have high costs and steep learning curves for non-specialized users.

Purpose of the Study:

  • To present a simple, self-assembly 3D point cloud data capture device with a low estimated cost (<€2500).
  • To describe a workflow utilizing a Visual SLAM-photogrammetric algorithm for 3D data processing.
  • To validate the system's performance in Building Information Modeling (BIM) environments.

Main Methods:

  • Developed a self-assembly device for 3D point cloud data capture.
  • Implemented a Visual SLAM-photogrammetric threaded algorithm in C++ for data processing.
  • Conducted outdoor tests comparing the device's point cloud data against total station measurements and Agisoft Metashape.

Main Results:

  • Achieved Euclidean average distance errors of 12-46 mm and RMSEs of 8-33 mm for distances between 5-20 m.
  • The system's accuracy met 'level 1' (51 mm) and 'level 2' (13 mm) tolerances for point cloud acquisition in urban design and historic documentation.
  • Demonstrated comparable performance to established photogrammetric software.

Conclusions:

  • The proposed low-cost 3D data capture system is suitable for non-specialized users.
  • The system's accuracy is validated for BIM applications, urban design, and historic documentation.
  • This technology offers a cost-effective solution for accessible 3D modeling.