Application of Web Graphics Technology to Coalmine Monitoring

In order to apply web graphics to monitoring, it needs to solve problems of local updating web pages, creating graph and transferring it.We use AJAX to implement local updating, and GDI+ to create graph and then convert into picture for users.Methodsfor promoting efficiency are given.The result shows that AJAX improves effect on display, indicates that graph built is accurate and can receive reply within the time allowed.