摘要
多尺度时空数据集成的根本目的是增加信息量。本文通过对时空对象变化过程的分析,指出对象进化的结果不仅是特征的变化,还包括机制的变化,其直接动力是对象行为,其根本原因是其内在机制,时空事件起着对象间信息通道的作用,据此提出对象进化模型,该模型可作为多尺度时空数据集成的结构性基础,在反映时空现象的演变过程,特别是异构演变过程,以及在这个过程中产生的因果关系的同时,还可以保留时空数据的不同时间尺度和空间尺度特点,从而达到增加时空数据库的信息量的目的。文中给出了该模型基于关系型数据库的一个结构示例。根据多空间尺度数据的特点,本文最后还提出了一个时空数据组织体系,用于指导数据访问过程。
The essential purpose of the integration of multi-scale spatiotemporal data is to enhance the richness of the information inside the spatiotemporal database. The object evolution model is proposed to satisfy this demand. This paper firstly gives a general inspection of the evolving process of the object, and then points out that the result of its evolution includes not only the feature changes but also the mechanism changes, the direct driver to its evolution is a behavior of an object, the essential causation to its evolution is the internal mechanism of the object, and the spatiotemporal event plays the role of the information carrier among the objects. Then the object evolution model is proposed based on this inspection. As the basement to integrate multi-scale spatiotemporal data, the object evolution model can retain the characteristic of the data with different temporal-scale or different spatial-scale, and reflect the temporal changes, especially the heteromorphic changes, and the causalities within the evolving process. One example to illustrate this model is also given. Finally, an organization framework of multi-scale spatiotemporal data is proposed to facilitate the data access based on the characteristic of multi-spatial-scale data.
出处
《测绘学报》
EI
CSCD
北大核心
2005年第1期71-77,共7页
Acta Geodaetica et Cartographica Sinica
基金
国家自然科学基金资助项目(40171015)
