顾及语义尺度的时空对象属性特征动态表达

发布时间：2018-02-04 13:56

  本文关键词： 时空对象 属性特征 时间尺度 语义尺度　出处：《地球信息科学学报》2017年09期 　论文类型：期刊论文

【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。
[Abstract]:The construction of full spatial GIS and the development of GIS application such as wisdom city need to collect many kinds of attribute data for the spatio-temporal objects abstracted from various geographic entities or geographical phenomena. These attribute data generally have the characteristics of multi-scale, multi-dimensional, dynamic. This paper aims at the problems of unclear organization structure, storage redundancy, semantic heterogeneity and so on. In this paper, a set of representation and operation method of attribute feature, which takes into account semantic scale and dynamic characteristics, is proposed, which realizes the classification organization of attribute information of spatio-temporal objects based on the concept classification theory. In attribute feature representation, a time marker independent of spatial features of spatio-temporal objects is introduced, and the attribute features of spatio-temporal objects under different time nodes are recorded and managed by combining the original set family and update set family of attribute representation. Then we set up the set of knowledge reference representation and add the semantic scale identification in the attribute feature expression for the attribute features with different semantic scale expression requirements. Finally, based on independent time marker, knowledge reference representation set and semantic scale identification are described. The operation methods of attribute information representation in time scale transformation and semantic scale transformation are given. An example is given for the dynamic representation and operation of the attribute feature. The method proposed in this paper is helpful to reduce the storage redundancy of the spatio-temporal object data model and to improve the operation efficiency of the attribute information. The cognitive mode of multi-time scale and multi-semantic scale of attribute feature of spatio-temporal object is realized preliminarily, which provides a new idea for fine management of attribute feature of spatio-temporal object.
【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
【分类号】：P208
【正文快照】： 刘朝辉1,李锐1,2*,王t熺，

本文编号：1490375