The 3-dimensional modeling technique for calculating radio propagation characteristics along railway

The author propose a modeling technique by scanning actual environments along a railway. In this technique, they are able to obtain three-dimensional coordinates of points along railway environments by installing laser scanners and line cameras on a train. Next, the three-dimensional coordinates are converted into polygon models, and in addition, camera images are pasted. These models are available for calculating radio propagation characteristics. We show the measurement and processing technique for obtaining precise three-dimensional models.