摘要
空间数据仓库的认知过程主要就是十一个层次的世界通过十个算子转换的过程,如何将某两个世界进行转换,上述十个算子起着至关重要的作用。实际上,这些转换算子主要是依靠元数据来实现的,要实现两个世界的转换,通晓这两个世界的元数据是转换的前提。因此,这十一个层次的世界模型及转换算子就可构成空间数据仓库元数据的认知过程理论。
From the description it can be known that the cognition process is primarily the transforming process of these eleven levels world by above ten operators, which directs the realizing of spatial data warehouse system.In the realizing course, above ten operators play a significant role in transforming between certain two levels worlds.In fact, these transforming operators are chiefly depended on metadata to realize, because each world owns metadata to describe it.For realizing the transform of two worlds, the premise is to understand metadata of these two worlds thoroughly.Therefore, these eleven levels' world model and transform operators can compose cognition process of metadata in spatial data warehouse.
出处
《测绘科学》
CSCD
北大核心
2008年第1期58-61,共4页
Science of Surveying and Mapping
