地球信息科学学报 ›› 2021, Vol. 23 ›› Issue (1): 113-123.doi: 10.12082/dqxxkx.2021.200423

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多粒度时空对象组成结构表达研究

李锐*(), 石佳豪, 董广胜, 刘朝辉   

  1. 武汉大学测绘遥感信息工程国家重点实验室,武汉 430079
  • 收稿日期:2020-07-31 修回日期:2020-10-22 出版日期:2021-01-25 发布日期:2021-03-25
  • 通讯作者: 李锐 E-mail:ruili@whu.edu.cn
  • 作者简介:李 锐(1974— ),女,湖北武汉人,教授,主要从事网络GIS、时空计算与大数据挖掘、知识图谱与语义计算研究。E-mail: ruili@whu.edu.cn
  • 基金资助:
    国家重点研发计划项目(2016YFB0502301);国家自然科学基金项目(41771426)

Research on Expression of Multi-granularity Spatio-temporal Object Composition Structure

LI Rui*(), SHI Jiahao, DONG Guangsheng, LIU Zhaohui   

  1. State Key Laboratory of Information Engneering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China
  • Received:2020-07-31 Revised:2020-10-22 Online:2021-01-25 Published:2021-03-25
  • Contact: LI Rui E-mail:ruili@whu.edu.cn
  • Supported by:
    National Key Research and Development Project(2016YFB0502301);National Natural Science Foundation of China(41771426)

摘要:

全空间信息系统、智慧城市的构建,需要将地理实体抽象成时空对象,而时空对象的多粒度性,体现在时空对象具有多尺度、多维度、多层次的特点。如何在当今海量数据中,对多粒度时空对象的信息进行有序组织成为时空对象研究中的难点。本文基于面向对象的思想,提出了一套时空对象组成的表达与操作方法,为时空对象信息的有序组织提供了新思路。该方法基于概念分类理论,将时空对象的组成分为实体对象组成与关系组成,在此基础上,通过构建时空对象信息集族、对象组成集族、关系组成集族,对时空对象组成结构的形式化描述,并基于时空对象的生命周期,给出构建、更新、析构、组合、分解等时空对象组成表达的相关操作,进一步完善多粒度时空对象组成结构的表达。最后,以城市道路的组成信息管理为例,将武昌区珞喻路作为研究的时空对象,对城市道路时空对象组成结构的表达及操作进行举例说明。该方法的提出,实现了多粒度时空对象组成结构的表达,减少时空对象组成的冗余。

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