面向实体的三维城市模型数据组织方法研究

摘要

文章旨在研究一种有效实用的三维城市模型数据组织方法.面向实体的三维模型是城市三维模型表达的一种重要方式,在表达实体几何特征的同时,能够完整地记录实体之间的逻辑关系,包括空间关系、语义关系等,尤其适用于城市复杂密集区域地理关系的表达.文中采用分区、分层的思想,依据城市空间划分指标体系和实体分类规则,设计了城市实体三维模型的构建流程,提出了一种面向实体的城市三维模型数据组织方法,构建了实体三维模型库,实现了模型数据的高效组织和管理.实验表明,该方法对于大规模城市实体模型数据的组织具有一定的实用价值.%The aim of this paper is to study an effective and practical method of 3D city model data organization.The entity-oriented 3D model is an important way of expression 3 D model of the city,with the expression of geometric features,at the same time,a complete record of the logical relationship between entities,including spatial relationship,semantic relations,expression is especially suitable for city intensive regional geographic relationship.The partition of hierarchical thinking,on the basis of city space classification index system and substantive rules,designed to build 3D model city entity process,puts forward a 3D model of a city data organization entity oriented method,constructs the 3D model database,to achieve an efficient data organization model and management.Experiments show that this method has a certain practical value for the organization of 3D model of large scale cities.