基于GML的多源异构空间数据集成框架研究

基于GML的多源异构空间数据集成将GML技术与空间数据集成技术相结合,能解决网络环境下地理信息资源相互不兼容的瓶颈问题,有效的实现数据的互操作。本文在分析GML数据格式特征的基础上,基于J2EE网络环境提出一个基于GML的多源异构空间数据应用集成框架。重点介绍了E00格式的空间数据规格定义以及向GML格式转换处理过程,并以福建省主要公路数据集为样本数据验证了集成结果。结果表明,采用GML作为多源异构数据集成的描述格式,可在数据层上有效地实现空间数据的集成和互操作。

A GML-based multi-source and heterogeneous spatial data integration framework

With the rapid development of computer and internet technology,the application of geographic information comes into age of internet gradually.People can easily get geographic information from internet.However,geographic information are multi-source,complex and incompatible.It is difficult to use them directly.GML and spatial data integration technology can be used to solve the problem in the network environment so that inter-operation of heterogeneous spatial data can be implemeted.Based on the analysis of data format and geometry elements of GML,and the framework introduced by GioWiederhold in 1991,a GML-based multi-source and heterogeneous spatial data integration framework was developed in a J2EE environment.Taking E00 and SHP as example,the spatial data specification of E00 and the GML-E00 conversion,are discussed.Finally,the data integration is validated taking Fujian Major Highway Database as a sample database and the interface of data is offered.The result indicates that GML for multi-source and heterogeneous spatial dataintegration is effective.