Design And Implementation Of Situation-Plotting System Based On Mobile Web

Situation plotting system is a kind of system which is supported by geographic information platform and reflects situation information with labels and characters.At present,the development of situation plotting system on the desktop is relatively mature,with the development of web technology and the expansion of battlefield scale environment,the experiment of single soldier battle enlarged,the importance of developing an application situation plotting system in mobile terminal is increasing.Compared with the desktop,the application environment of the mobile end needs to overcome the problem of insufficient computing power.Therefore,the method of encapsulating the underlying algorithm library,calling from the middle layer and passing it to the upper layer for drawing is used.Due to the mechanism of the operating system of the application environment,Java is not supported,and HTTP services cannot be used directly to deliver messages.A proper message delivery mechanism is needed for the transmission of messages from the bottom to the top.The main contents and innovations of this paper are as follows:1)Analysing the principle of JS calling C++,and a mechanism is designed to deliver messages from the bottom to the top.Because Java is not supported and HTTP link cannot be used to deliver messages,based on the principle of JS calling C++,the plugin layer is encapsulated to implement the process of encapsulation,parsing and delivery of underlying messages.2)Realize the interactive rendering algorithm and response function of label in the upper view layer.After analyzing the transferred information,we need to draw on the screen according to the acquired label drawing information,encapsulate and implement the drawing algorithm of basic elements,point label and line label.The prototype system is built on a domestic operating system and the drawing effect is tested.The drawing effect meets the requirements.