中文摘要：

船舶自动识别系统（Automatic Identify System,AIS）在海上交通中得到广泛应用,大量的船舶AIS轨迹数据被采集存储并应用于船舶交通的分析.AIS数据中通常包含着多维度的时间属性、空间属性、船舶属性等信息,然而传统的二维轨迹可视化方法往往只展现出船舶轨迹数据的空间属性.本文针对此不足提出了一种能同时展示时间、空间和速度的三维可视化模型,充分展示AIS数据的多维特性.并通过实例说明该可视化模型能使人更直观深入地理解AIS轨迹数据的时空特性.最后选取桥区的船舶轨迹数据进行分析实验,结果表明,该模型能准确地表现出桥区船舶的通航状态.

英文摘要：

With the rapid development of AIS （Automatic Identify System） applied in maritime transportation, large amounts of vessels＇ trajectory data are collected and employed to analyze vessel traffic. The AIS data usually contain multidimensional attributes including time attribute and speed attribute. However, the traditional visualization approaches only show the spatial properties of the AIS data, and rarely related to time attributes and other information. Therefore, a 3D visualization model, which can present time, latitude, longitude and speed simultaneously, is proposed for describing the multidimensional nature of AIS data in this paper. Additionally, a comparison experiment is carried out to illustrate that the 3D visualization model can prompt the understanding of the AIS data for analyzer, especially under the help of the time information. Finally, the visualization model is applied to explore the AIS data of bridge area and results indicate that the model can reflect the navigation situation in the bridge area properly.