地球信息科学学报

地球信息科学学报 ›› 2017, Vol. 19 ›› Issue (9): 1185-1194.doi: 10.3724/SP.J.1047.2017.01185

• 全空间信息系统理论方法 • 上一篇    下一篇

顾及语义尺度的时空对象属性特征动态表达

刘朝辉1(), 李锐1,2,*(), 王璟琦1   

  1. 1. 武汉大学 测绘遥感信息工程国家重点实验室,武汉,430079
    2. 武汉大学地球空间信息技术协同创新中心,武汉 430079
  • 收稿日期:2017-05-11 修回日期:2017-08-11 出版日期:2017-10-09 发布日期:2017-10-09
  • 作者简介:

    作者简介：刘朝辉(1993-),男,硕士生,研究方向为地理信息系统建模理论。E-mail: liuzhaohui@whu.edu.cn

  • 基金资助:
    国家重点研发计划项目“全空间信息系统建模理论”（2016YFB0502300）;国家自然科学基金项目“基于群体用户密集访问模式的网络地理信息并发服务方法研究”（41371370）;测绘遥感信息工程国家重点实验室专项科研经费资助

A Dynamic Representation Method of Considering Semantic Scales of Attributes of spatio-temporal Object

LIU Zhaohui1(), LI Rui1,2,*(), WANG Jingqi1   

  1. 1. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China
    2. Collaborative Innovation Center for Geospatial Technology, Wuhan University, Wuhan 430079, China
  • Received:2017-05-11 Revised:2017-08-11 Online:2017-10-09 Published:2017-10-09
  • Contact: LI Rui

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摘要：

全空间地理信息系统的建设和智慧城市等GIS应用的发展,需对各类地理实体或地理现象抽象成的时空对象采集多类型的属性数据,这些属性数据一般具有多尺度、多维度、动态性的特点,带给时空对象属性特征的表达和管理一定的挑战。本文针对当前时空对象属性特征表达方法中存在的组织结构不清晰、存储冗余、语义异构等表达问题,提出了一套顾及语义尺度和动态特性的属性特征的表达和操作方法。该方法基于概念分类理论实现时空对象属性信息的分类组织,在属性特征表达中引入独立于时空对象空间特征的时间标记,结合属性表达的原始集族和更新集族来记录和管理不同时间节点下的时空对象属性特征;进而面向具有不同语义尺度表达需求的属性特征,设置知识参考表达集合,并在属性特征表达中增加语义尺度标识,对其语义尺度及不同语义尺度间的转换关系进行描述。最后,基于独立时间标记、知识参照表达集合及语义尺度标识,给出属性信息表达在时间尺度转换和语义尺度转化的操作方法,并举例给出了该属性特征动态表达和操作方法的一种实现。本文提出的方法有助于减少时空对象数据模型的存储冗余,提高其属性信息的操作效率,初步实现了时空对象属性特征的多时间尺度和多语义尺度的认知方式,为时空对象属性特征的精细化管理提供了新思路。

关键词: 时空对象, 属性特征, 时间尺度, 语义尺度

Abstract:

As the development of Smart City and other GIS applications, we need to collect many types of attribute data of spatio-temporal objects derived from a variety of geographical entities or geographical phenomena. Generally, these attribute data have features of multi-scale, multi-dimension and dynamic, which pose challenges to effective expression and management of attribute characteristics of spatio-temporal objects. In view of the unclear structure, storage redundancy and semantic heterogeneity in the current expression method of attribute for spatio-temporal object, we present a set of expression and operation methods of attribute characteristics that take semantic and dynamic features into account. Based on the concept of classification theory, this method classifies different types of attribute information, introduce the time stamps that are independent of the spatial information of spatio-temporal object. It was coordinated with original sets and update sets to record and manage attribute information at different time nodes. Furthermore, to attribute with expression requirement of different semantic dimensions, we add semantic scale identifier to point out the semantic dimension and set knowledge reference to describe the transformation relation between different semantic scales. Finally, based on the design of dependent time stamp, the knowledge reference and the semantic scale identifier, we formulate the operation methods of transformation between different time scales of attribute information as well as semantic scales and give an example of both operation methods. The expression and operation methods of attribute information we proposed, can help to reduce the redundancy of the expression model for spatio-temporal object realize the cognitive mode of attribute with multi-time scale and multi-semantic scale, and provide a novel method to fine management of attributes of spatio-temporal object.

Key words: spatio-temporal object, attribute, time scale, semantic scale