Enhancing lithic analysis: Introducing 3D-EdgeAngle as a semi-automated 3D digital method to systematically quantify stone tool edge angle and design v1
Lisa Schunk, Anja Cramer, Konstantin Bob, Ivan Calandra, Guido Heinz, Olaf Jöris, Joao Marreiros · 2022
This protocol describes a method ("3D-EdgeAngle") to measure edge angles on 3D models. The method is semi-automated and script based. 3D-EdgeAngle illustrates an objective way of measuring the edge angle at cross sections along the entire tool edge in defined steps and also allows measurements at different distances perpendicular to the edge. Depending on the scale of analysis, three parameters can be controlled accordingly. Within this protocol, all steps, starting from the acquisition of the 3D data to the statistical analysis, are described. Although the method is script based, 3D-EdgeAngle can also be executed manually. The protocol illustrates both versions. The scripts applied to perform the edge angle measurements are incorporated in the protocol as Zenodo links.