Spatio-temporal Three-Dimensional Mapping of Collision Accident in Tokyo Bay


The ratio of collision is high in a marine accident. The collisions occur frequently in a congested sea area and they tend to occur for a similar place and a cause repeatedly. Therefore, it becomes the prevention of recurrence of the accident when ship operators know the outbreak situation of the collision of the navigation area before the operation. In previous study, it was revealed that the area with many accidents changed by time. However, the time influence could be evaluated by a comparison of cross-section maps with arbitrary time intervals. In this study, the collision occurrence state was represented in a three-dimensional space composed of two-dimensional geographical plane and one-time dimension. To understand spatio-temporal pattern of collision occurrence state, the author expanded kernel density estimation in the three dimensions from the two dimensions. Because the collision occurrence probability density in any coordinate was found, it is possible to find the density on the planned route. The author changed speed as well as the departure time from a port, and a comparison was enabled with the risk of the route.


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  • Accession Number: 01688559
  • Record Type: Publication
  • Source Agency: Japan Science and Technology Agency (JST)
  • Files: TRIS, JSTAGE
  • Created Date: Jul 1 2018 3:01PM