A Position Digitizer for 3-Dimensional Measurements

ABSTRACT Atriangulation device was developed to record the locations of perennial tree roots as they were unearthed. The device allows measurement of the coordinates of any point in a 2- by 2- by 1.6-m volume with an accuracy of about ±5 mm. The device also has applications in recording the topography of a soil surface in the presence of crop residues.