Restoring Method of Vessel Track Based on AIS Information

Based on Automatic Identification System (AIS) information, the existing vessel track is combined by linking the two adjacent points. The linked track is very different from the real track of the vessel. So a fitting method is needed for restoring the real track vividly. AIS information is processed when the vessel is stand-on and turning by Piecewise Linear Interpolation, Piecewise Cubic Interpolation and Piecewise Cubic Spline Interpolation. The results show that the three tracks are nearly the same when the vessel is stand-on, the track presents by Piecewise Cubic Spline Interpolation is best, which proves that Piecewise Cubic Spline Interpolation is a good method to restore the vessel track in utilizing AIS information.