Design And Relization Of Marine Traffic Accounting System

Marine traffic survey or marine traffic investigation basically aims at utilizing all available methods to collect water traffic data and then to analyze,study,finally to learn and master the water traffic circumstance,general characteristics and laws from the microeconomic and macroeconomic view.Marine traffic survey or marine traffic investigation involves three parts.of work: to collect the original water traffic data,to determine the data processing method and target and to process the data.This vessel traffic statistic system has been put into operation to count the traffic density east of Shenzhen waters at the summit of Saumen Island(22°27′.4N, 114°37′.5E) with height of 298m since March 18th 2005,and the items of statistics mainly include:distribution of tracks,total number of ships within the chosen area, statistics of ship length classification and statistics of ship sort classification.This text argued the matter of coordinate conversion which was usually used in Mercator projection of electronic charts,utilized the fast Mercator projection algorithm and gave specific converting formula.Utilizing the database tools of Microsoft VB.NET and SQL Sever,the software finally came out and this text described the whole course of the design and realization of the software.This text discussed the problem of coordinate conversion of Mercator projection which was often used in electronic charts,introducing the fast arithmetic of Mercator projection,giving out the specific conversion formula.The vessel traffic statistics system was the further development based on the original waters area reckon system,which added functions of read in of AIS data, drawing up of time-sharing routes and statistics of vessels flow.It was Microsoft Visual Studio 2005 that was used to develop the vessel traffic density statistics system,which had two developing platforms,Chinese version of Microsoft Windows 2003 Server for development while Chinese version of Microsoft Windows XP Professional for experiments.This text expatiated the whole process of the design and realization of the software. This vessel traffic statistic system can help the concerning departments to master and analyze the traffic data of the relevant water area,and then to conduct scientific traffic administration and service.