In order to implementing the opening and interoperability of GIS,OGC present a series of abstract specifications and implementation specifications. WMS(Web Map Service)based on XML is one kind of por- trayal service in the framework of OGC.

• 以实现地理信息系统的开放性和互操作,OGC制定了一系列的地理数据和操作软件开发规范,基于XML的WMS(Web Map Service)是其地图服务规范之一。