关键词: 全空间数字世界, 时空域, 子时空域, 时空实体, 时空对象, 时空对象类, 对象建模, 关系类

Abstract:

The pan-spatial digital world is a comprehensive data body composed of spatiotemporal objects describing various entities and elements in the real/virtual world in the computer system. It is an object-oriented description of the real/virtual world from macro to micro dimensions. Since the traditional management method using blocks and layers in GIS is not suitable for managing the complex and dynamic spatio-temporal objects in the pan-spatial digital world, an organization and management method of pan-spatial spatio-temporal objects based on spatio-temporal domain is proposed in this study. Based on analyzing the concept, composition, and characteristics of pan-spatial digital world, the concept of spatio-temporal domain is put forward. This study defines the data organization mode and essential characteristics in the spatio-temporal domain, and establishes a data organization system and management method including sub spatiotemporal domain, spatio-temporal object class, object relation class, and life cycle sequence of spatio-temporal objects in the spatio-temporal domain. The storage and management experiments of spatio-temporal data are carried out, which proves the practicability and feasibility of the organization and management of spatio-temporal objects based on spatio-temporal domain. This study provides an underlying support for the generation and processing, inspection and verification, visualization and output of spatio-temporal objects for future application scenarios.

Key words: pan-spatial digital world, spatio-temporal domain, sub-spatio-temporal domain, spatio-temporal entity, spatio-temporal object, spatio-temporal object class, object modeling, relationship class