随着地理信息系统的广泛应用,GML己经成为空间数据编码、传输、共享、存储和发布的一种国际标准。大量GML数据的出现,对如何有效地管理GML数据提出了新的挑战。根据GML文档的特点,提出了一种基于空间坐标分离的存储方法。该方法将GML文档中的空间坐标数据与非空间坐标数据相分离,分离后的数据分别使用不同的技术进行存储,通过二维坐标连接因子将分离后的数据相关联起来,以保证分离前后数据的一致性。实验结果表明,提出的存储方案是可行的、有效的。
With the wide employment of GIS,GML has become the de facto international standard for spatial data encoding,transmitting,sharing,storing and distributing.Recently,with large amounts of GML data appearing in the literature,how to manage it efficiently is becoming a new challenge.A new storage model which is based on coordinates data separation is proposed after looking into the feature of GML.Experimental result shows that the storage model brought forward is feasible and efficient.