三维港口GIS的场景组织与建设过程模拟

Scene Organization and Construction Process Simulation of 3D Harbor GIS

针对港口建设研究了三维场景数据组织和建设过程的动态模拟。首先,介绍了复杂三维场景数据分类分区标准和数据建模流程;然后,详细阐述了基于场景分块、多级模型动态调度和"实体-类"模式的复杂三维场景组织和集成方法;最后,提出要素生存周期的概念,将模型与建设时间进度匹配。在此基础上,设计并开发了天津中心渔港三维动态演示系统,实现港口建设过程的三维动态模拟。

This paper aims at studying 3D scene organization and construction process simulation. Firstly,we introduce feature classification and scene zoning standard and modeling process in the great 3D scene. Secondly,formulate 3D scene organization and integration method which is implemented by scene blocking,dynamic scheduling based on LOD（ level of detail）,and＂entity-class＂modeling. Finally,propose the concept of life cycle,and match models with time schedule. Based on this,the dynamic visualization systems of Tianjin central fishing port is developed and the 3D dynamic simulation of Harbor construction process is realized.