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Enhancing lithic analysis: Introducing 3D-EdgeAngle as a semi-automated 3D digital method to systematically quantify

Lisa Schunk1,2,3, Anja Cramer4, Konstantin Bob5

  • 1Faculty of Historical and Pedagogical Sciences, Institute of Archaeology, University of Wroclaw, Wrocław, Poland.

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Summary

This study introduces 3D-EdgeAngle, a new semi-automated method for precisely measuring stone tool edge angles using 3D data. This approach enhances the accuracy and reproducibility of lithic analysis, improving our understanding of past human technology.

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Area of Science:

  • Archaeology
  • Lithic Analysis
  • 3D Scanning Technology

Background:

  • Stone tool analysis provides insights into past human behavior.
  • Edge angle measurement is crucial for interpreting tool function and design.
  • Manual measurement techniques have limitations in accuracy and reproducibility.

Purpose of the Study:

  • To introduce a novel, semi-automated method for precise edge angle measurement of stone tools.
  • To improve the accuracy, objectivity, and reproducibility of lithic analysis.
  • To enhance the understanding of past human technological behavior through improved tool analysis.

Main Methods:

  • Development of a script-based, semi-automated method (3D-EdgeAngle) utilizing 3D scan data.
  • Application of the method to measure edge angles at cross-sections along the entire tool edge.
  • Control of measurement parameters for high-resolution analysis at varying distances perpendicular to the edge.

Main Results:

  • 3D-EdgeAngle provides objective and precise edge angle measurements.
  • Significant reduction in random and systematic errors compared to manual methods.
  • Generated data is reproducible and statistically evaluable.

Conclusions:

  • 3D-EdgeAngle offers a highly accurate and systematic approach to calculating edge angles in lithic studies.
  • The method has the potential to become a standard for objective stone tool analysis.
  • Improved lithic analysis through 3D-EdgeAngle will enhance our understanding of ancient tool design and use.