Everyone on this forum should be aware of the pioneering work that Ted Corbitt did over 40 years ago. In his monograph (http://www.usatf.org/about/committees/LongDistanceRunning/RoadRunningTechnicalCouncil/history/corbitt.pdf) Ted goes into great detail about different methods of measuring and proceeds to tell what is wrong with each on -- except the calibrated bicycle method. I suggest you point your surveyor contact to Ted's document. He makes too many points about the problem with the calibrated surveyor wheel to reproduce here.
Alan