基于特征的海洋锋线过程时空数据模型分析与应用  

Feature-based Line Process Spatio-temporal Data Model

作　　者：薛存金[1] 苏奋振[1] 周成虎[1] 

机构地区：[1]中国科学院地理科学与资源研究所资源与环境信息国家重点实验室

出　　处：《地球信息科学》2007年第5期50-56,F0004,共8页Geo-information Science

基　　金：国家自然科学基金项目(40571129);中国科学院创新项目(KZCXZ-YW-304-1)

摘　　要：客观世界存在时空场,大部分地理实体或现象在时空域具有动态变化特性,其空间、时间和属性是过程的统一体,传统的GIS时空数据模型在描述、表达、组织与分析这类数据时面临许多挑战。然而,基于特征的数据模型和以过程为对象的时空数据组织在动态数据的描述与表达的方面具有独特的优势。本文探讨了基于特征的线过程时空数据模型组织的六元组框架体系,实现空间、时间和属性的一体化存储和地理实体的动态分析。在分析线时空过程特性的基础上,归纳总结出3大类12个类别的线过程,进一步提出了基于特征的线过程时空数据模型(Feature-based Line Process Spatio-temporal Data Model)的概念;利用文件层次分块结构对时空线过程数据进行了组织与存储。最后以海洋锋为实例,探讨了该模型在时空数据组织、时空查询、时空过程提取和时空过程可视化等方面的应用。结果表明,该模型能够很好地应用于具有时空过程特性的线数据中,也为时空数据模型的总体设计提供借鉴。There exist spatio-temporal fields in objective world, where most phenomena have the dynamic characteristic, with its space, time and attributes changing continuously. And there are many challenges when applying traditional GIS＇s data models to describe, organize and represent these dynamic data. And further dynamic analysis is far more difficulty. However, the research on data models based features and data organization process-oriented objects have made a few progress in cadastral dynamic management, detection and analysis. Firstly, the sextuple description framework of the line process spatio-temporal data model based feature is discussed with the core ideal of object-oriented technologies, which can realize the unified storage and dynamic analysis of space, time and attributes. Then based on the analysis of the characteristic of line spatio-temporal process, 3 main classes and 12 kinds of line processes are inducted, and then the feature-based line process spatio-temporal data model is proposed. Furthermore, the UML framework is designed by applying object-oriented technology, and the file hierachical block based-raster model is presented aiming at organizing the line process data. Taking the ocean fronts as an example, the paper discusses the application of the model in spatio-temporal ocean fronts data organization, spatio-temporal inquiry, spatio-temporal information extraction, and spatio-temporal visualization. It is proven that the model is well applicable to line process data with the dynamic characteristics, and can also provide basis for spatio-temporal data model whole designing.

关 键 词：特征 线过程时空数据模型 文件层次分块模型 海洋锋 

分 类 号：P208[天文地球—地图制图学与地理信息工程]