关键词: 全空间信息系统, 时态GIS, 地理实体, 时空对象, 组成结构, 关系集族, 生命周期, 多粒度变换

Abstract:

The construction of pan-spatial information systems and smart cities requires abstracting geographic entities from spatiotemporal objects. The multi-granularity of spatiotemporal objects is reflected as the multi-scale, multi-dimensional, and multi-level characteristics of spatiotemporal objects. In the era of big data, how to organize the information of multi-granular spatiotemporal objects has become a difficult issue in the research of spatiotemporal objects. Based on object-oriented thinking, this paper proposes a set of expression and operation methods for the composition of spatiotemporal objects, which provides a new idea for the orderly organization of spatiotemporal object information. This method is based on the concept of classification theory and divides the composition of spatiotemporal objects into entity object composition and relation. Then we construct the spatiotemporal object information set , object composition set, and relationship composition set to make a complete description of the composition structure of spatiotemporal object. Then we provide related operations on the composition and expression of spatiotemporal objects such as construction, update, destruction, combination, and decomposition to further improve the expression of multi-granular spatiotemporal objects. Finally, we take Luoyu Road in Wuchang District as the spatiotemporal object in this study, and the expression and operation of the structure of the spatiotemporal object are illustrated with examples. The proposed method realizes the expression of the composition structure of multi-granular spatiotemporal objects and reduces the redundancy of the composition of spatiotemporal objects.

Key words: pan-spatial information system, temporal GIS, geographic entities, spatiotemporal objects, composition structure, relational set, life circle, multi-granularity transition