【摘要】 分析了栅格元数据基于文件、关系表和XML的3种存储管理方式,比较它们的优缺点,得出了XML适合描述空间数据库中栅格元数据的层次性、复杂性和面向对象性,并具有可扩展性。在Be-yonDB中设计和实现了基于XML的栅格元数据管理模型,并以地球系统科学数据共享平台中DEM数据集为例验证该模型的可扩展性,为空间数据库中海量遥感影像数据的管理研究提供参考。更多还原

【Abstract】 Discussing the three storage models:storage based on traditional file,storage based on the relational table and storage based on XML,and analyzes their advantages and disadvantages.And then,it is a conclusion that,XML approaches to describe the raster metadata’s hierarchy,complexity and object-oriented,and has good extensibility.Raster metadata because of its complexity and hierarchy.In the following sections,we design and implement the management model for raster metadata based on XML in BeyonDB.Finally this paper taked the DEM metadata in Earth System Science Data Sharing Platform as example to verify its extensibility,and it would be a reference for the research on managing massive remote sensing data in spatial database.更多还原