Abstract
A Mobile Mapping System (MMS) can acquire three-dimensional position data around a vehicle. However, MMS computes low accurate results if MMS is not able to receive enough signals of Global Navigation Satellite System. When MMS computes bad results, the result is adjusted by Ground Control Point (GCP), which size is not documented in the manual. The purpose of the present research is to investigate GCP size the for a more effective installation method of GCP. As a method, a comparison has been done between the measurement results and calculation results. As a result, the GCP size of minimum error and minimum size of exposure were shown by this receach. The minimum size of GCP is 0.09 meters square in the conditions that the running speed is 40km/h, the GCP is set on the side 10m away from running course, and the laser data are used by one side equipmen.
