基于AIS的船速位置分布图的实现

摘要

船速位置分布是指某一时间段内指定水域所有船舶速度平均值的空间变化情况。船速位置分布图反映了不同邻近水域在相同时间内的船速分布情况，是交通流的重要组成部分，是分析海事的重要参考。本文提出了一种新的船速分布图即网格分布图。为绘制船速网格分布图，采用AIS信息数据库提供的速度、位置和时间信息，使用数据库技术、数据库访问技术、电子海图控件和VC++，设计相应流程，实现了网格分布图在电子海图上的显示。%The position distribution of ship speed is the situations of space changes for the average of all ship speed in a specified water during a certain period. A diagram of position distribution of ship speed reflects the situation of distribution for ship speed in different but adjoining waters during the same period,is an important part for traffic flow and important reference to analyze the marine accidents. A new pattern of diagram,i. e. a diagram of grids for ship speed was put forward and fulfilled through adopting the information on speed,position and time in the AIS database,taking use of the techniques of database and database access,the control of electronic chart and VC++, and then designing the appropriate procedure.