A new Web mapping architecture based on SLD and pattern

A Web mapping system is described based on OpenGIS style layer specification and pipeline pattern. The patterns used to design the system are classified into three levels that are realized in architecting, designing and implementing of the system each. The whole system is constructed on the pipeline pattern. The pattern is divided into four filters to finish the selecting of spatial data, the generating of map feature style, and the rendering of map layer and presentation of map image. Map style data saved in a custom XML document is decoupled from map feature data that associate feature style generator filter. The system runs on Microsoft COM+ distribute implementing pattern.