一种面向时空对象及其关联关系动态变化表达的概念数据模型

发布时间：2018-07-17 01:27

【摘要】：根据全空间信息系统中地理实体基本特征以及存储管理的需求,本文提出了一种面向地理实体及其关联关系动态变化表达的时空数据模型。(1)在地理实体方面,将其抽象为由有序、无缝对象片段组成的时空对象,并建立了对象片段表达的三元组模型,即空间位置、几何形态和属性特征;(2)在关联关系方面,采用基于RDF模型来对空间关系和属性关系进行形式化描述;(3)在动态变化方面,将地理实体的变化分为空间位置的变化、几何形态的变化和属性特征的变化,关联关系的变化分为空间关系和属性关系的变化,并分别采用快照/增量、方程/模型2种方式来统一表达它们的离散和连续变化。该模型可显式地描述动态的时空对象及其关联关系在时空过程中的变化,有助于探讨和挖掘地理现象的基本变化规律和内在关联性。
[Abstract]:According to the basic characteristics of geographic entities and the requirements of storage management in the whole spatial information system, this paper presents a spatio-temporal data model for the dynamic expression of geographic entities and their relationships. (1) in terms of geographic entities, It is abstracted as a spatio-temporal object composed of orderly, seamless object fragments, and a ternary model of object fragment representation is established, that is, spatial position, geometric form and attribute feature. (2) in the aspect of correlation relation, The RDF model is used to formalize the spatial relationship and attribute relationship. (3) in the aspect of dynamic change, the change of geographical entity is divided into the change of spatial position, the change of geometric form and the change of attribute feature. The change of correlation relation is divided into spatial relation and attribute relation, and the discrete and continuous changes are expressed by snapshot / increment and equation / model, respectively. This model can explicitly describe the changes of dynamic spatio-temporal objects and their relationships in the process of space-time, and it is helpful to explore and explore the basic rules of change and intrinsic relevance of geographical phenomena.
【作者单位】：武汉大学测绘遥感信息工程国家重点实验室;武汉大学地球空间信息技术协同创新中心;
【基金】：国家重点研发计划项目“全空间信息系统与智能设施管理”(2016YFB0502300)
【分类号】：P208

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