基于规则库的三维空间数据模型  

A 3D Spatial Data Model Based on Rule Base

作　　者：郑坤[1] 贠新莉[1] 刘修国[1] 黄飞 

机构地区：[1]中国地质大学信息工程学院,湖北武汉430074 [2]武汉中地数码科技有限公司,湖北武汉430074

出　　处：《地球科学（中国地质大学学报）》2010年第3期369-374,共6页Earth Science-Journal of China University of Geosciences

基　　金：国家重点"863"项目(No.2007AA120503);教育部新世纪优秀人才支持计划项目(No.NCET-07-0772)

摘　　要：三维空间对象的形式复杂多样,对象之间的空间关系尚未形成共识.三维空间数据模型的空间及非空间关系的表达更是难以统一.典型的三维空间数据模型包括面向实体型、面向关系型和混合型3种数据模型,但这些模型存在诸如拓扑操作困难、对象语义描述不完整、关系表达欠缺等一系列不足.通过分析、综合3种模型的优缺点,以顾及拓扑面向实体的三维矢量数据模型为基础,设计了基于规则库的三维空间数据模型.这是一个将关系与对象相统一的新型数据模型.通过对对象关系的分析研究,引入规则的概念,进而构建出规则库,提出对空间对象间关系和结构统一的,完整的表达和管理方式.结合地质、矿山等应用将该三维空间数据模型在多个城市的三维地质应用中进行成功验证.通过应用,说明该模型实现了空间对象的自身结构和对象之间关系的统一表达,具备自定义、可扩展的空间对象关系表达能力,能够适应复杂应用要求,具有良好的应用前景.Three-dimensional objects are in various forms,and opinions differ as to the spatial relationships between objects.It is even more difficult to reach a consensus on the relationship between space and non-spatial three-dimensional data model.There are three kinds of three-dimensional space-oriented,namely,entity type,relationship-oriented and mixed-type,but the traditional models have drawbacks,such as topology difficulties for operation,incomplete object semantics description,lack of relationship expression.Based on a rule-based library,we design a new three-dimensional data model aimed at retaining the advantages and overcoming the disadvantages of the traditional models.The new model takes into account the topology of three-dimensional vector-oriented data model entities,introducing the concept of rules,unifying the relational and object data model.building a rule base for space objects and structures with a unified,complete expression and management.The three-dimensional spatial data model has been applied in a number of cities both in geology and mining and it proves to be successful.The success of applications shows that the model is featured by unities of expression,with a custom,scalable spatial object-relational skills between the space object and the object of its structure,adapting to the complex application requirements,and it has good application prospects.

关 键 词：关系 规则 规则库 三维空间数据模型 地理信息系统 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论] TP751[自动化与计算机技术—计算机科学与技术]