中文摘要：

采用开放式网格服务体系结构-数据访问与集成（OGSA—DAD中间件的数据访问模式，利用空间数据引擎的空间数据管理能力，构建分布式的多源网格数据服务（GDS）．基于WKT（Well Known Text）中间数据模型，构建一个空间数据查询和访问的统一模式，并将结果集转换为通用的空间数据格式．实例表明，通过WKT中间数据模型，可实现自定义查询或跨数据服务资源的联合查询，查询结果可以方便地转换为XML，SVG，GML文档．

英文摘要：

On basis of the data accessing ability of spatial data engine （SDE）, the open grid services architecture-data access and integration （OGSA-DAI） middleware was adopted to construct grid data services （GDS）, which integrated distributed multi-source spatial data under grid environment. The well known text （WKT） was introduced to form an unified spatial data querying and accessing mode, the querying result sets could be transformed into general data formats. The instance illustrated that the WKT data mode was fit for custom query and joint query across resources, query result sets were conveniently transformed into XML, GML and SVG.