I am working on a project where we need to analyze 3d geometry in our visualization tool and the photos associated with them. For the tiepoint xyz values in the xml, what are the units (meters, centimeters, etc)? Also what are the coordinates relative to i.e. where is the origin defined (the center of the final 3d model? etc?). Any help and information on the xzy values for the tiepoints would be much appreciated. Thanks!