基于GML的空间数据发布服务

摘要

This paper put forward an improved spatial data distribution service model based on GML from the spatial data distribution problems, analyzed the key technologies used in the model and the model of working mechanism. And it elaborated map browsing of the display layer, the communication between business logic layer and display layer, the conversion of other GIS data formats to the GML documents, the analytic of GML documents, and the conversion of GML to SVG etc. key steps in the process of spatial data distribution service. It fully reflected the function of GML as the intermediate format in spatial data distribution service.%从空间数据发布中存在的问题出发,提出了一种改进的基于GML的空间数据发布服务模型；剖析了该模型中用到的关键技术以及模型的工作机理；阐述了空间数据发布服务过程中显示层的地图浏览,业务逻辑层与显示层之间的通信,其他GIS数据格式到GML文档的转换,对GML文档的解析,GML到SVG的转换等关键步骤,充分说明了以GML为数据转换的中间格式在空间数据发布服务中的作用.