Methods and systems for a portable metrology device are described. A CMOS camera or CCD is also mounted on the pen body for detecting reflections of the light. The trace identifier can be used to exactly correlate a physical connection on the client to a physical connection on the server. A final processing apparatus that is common to the color and monochrome image recording apparatuses is disposed in the front of the color image recording apparatus. Thus, a radio relay system can be implemented which is capable of relaying data with a high degree of reliability. The bag has a skirt extending from the closed end of the bag to a mouth of the bag, with a drawstring fro contracting the mouth of the bag to give the bag the approximate shape of an inverted cone.