【作者】 王志恒；

【导师】 杨国东；

【作者基本信息】 吉林大学 ， 地图制图学与地理信息工程， 2008， 硕士

【摘要】 数码城市往往涉及大范围复杂的自然与人文地物建模,尤其困难的是建立覆盖整个城市范围的三维城市模型。至今,三维模型的构建仍是一项投资大、技术难度较高、技术要求十分复杂的工作,其技术水平是影响数码城市GIS建设的重要制约因素。本文结合三维建模、数据库以及组件式开发等技术,对三维模型的构建原理和方法,三维模型构建技术在数码城市GIS中的应用进行了研究:基于二维GIS数据,实现了三维模型的动态、批量创建;实现了三维CAD模型数据与数码城市GIS的集成;创建吉林大学朝阳校区各建筑物的三维符号库;建立VirtualCampus系统,系统具备了三维场景虚拟浏览、空间量算、信息查询、信息统计分析、数据更新及用户管理等功能;基于COM的事件监听机制,利用OpenGL实现了对三维场景的特效渲染,增强了场景的真实感,弥补了ArcEngine在三维特效实现上的缺陷。更多还原

【Abstract】 CyberCity often involves the modeling of Wide-field complex ground object of nature and humanity, especially difficulty in building the three-dimensional model which cover the whole city. Up to now,the construction of three-dimensional model is still a work which needs great investment,more difficult technology and complex technical requirements, and its level of technology is the very important restriction factor of affecting the construction of CyberCity GIS.This paper study the principle and method of three-dimensional construction and the application of the technology of three-dimensional construction in CyberCity GIS combinating the technique of three-dimensional modeling、database and component based development: achieve the objective of dynamic construction and construction as a batch based on the two-dimensional GIS data; Building the three-dimensional symbol database of the buildings in the Chao Yang school region of Jilin University; Building the VirutalCampus system,which have the function of three-dimensional browsing、spatial measuring、information querying、information analysis、data updating and user management; Based on the technology of event monitor of COM , achieve the special treatment to the three-dimensional scene using the rendering function of OpenGL, enhancing the realistic sense and immersing display of the scene, remedying the defect of implementation of three-dimensional special effect with ArcEngine.更多还原