A Till now, when installing the domestic VTS system, we considered the topographical condition and marine traffic situation of the pertinent control sea area and decided the number of Radar, location or height that must be installed through the second dimension chart check. But, the location or height of the Radar isn't what can be decided by the second dimension chart check simply, and must be decided while considering the form of surrounding topography and height totally, and in case the location and height of the Radar are decided not considering this amply, the surveillance area by Radar is overlapped or there may happen blind sector that is impossible to be supervised by the Radar.
So, in this study, we aimed technological development that can utilize in the selection of Radar location and height at the time of Radar's performance improvement that is installed now or may be installed in the future. For this, we improved the existing method that decides the Radar's location, etc. by the second dimension chart check, and suggested the way to decide the optimal location and height of the Radar using light beam that is like the electro-wave feature of the Radar and third dimension topographical space data that is produced identically with the natural condition such as the real topography by 3D graphic tool.