These values indicate the default coordinates of a point belonging to the first plane cutting the pointcloud that appears in the Pointcloud Operator dialog box. The start point value is defined with the START PT parameter in the Edit window.
Entry Name: Start-(XYZ)
Entry Type: Real Number that specifies the XYZ values in mm. The default values are X=0, Y=0, and Z=0.
See "CROSS SECTION" in the PC-DMIS Laser documentation for more information.