基于GIS的三维虚拟校园设计与实现

三维GIS技术近来迅猛发展,受到了广泛关注.较二维GIS而言,三维GIS能更真实地表达客观世界,且对空间对象进行三维显示、分析和操作也是三维GIS特有的功能.以南京信息工程大学为例,介绍了利用三维GIS技术进行虚拟校园建设的过程,阐述了基于GoogleSketchUp和ArcGIS的三维可视化设计方法进行三维场景建模与优化、虚拟校园系统功能设计以及三维场景的浏览功能、建筑物属性的查询功能、路径分析和动画输出等功能的实现技术.最后指出了系统存在的问题,并提出了下一步的研究方向.

Design and implementation of 3D virtual campus based on GIS

Technology of 3D GIS had developed rapidly and obtained widespread attention.Compared with two-dimensional GIS,3D GIS represents natural world more vividly.Moreover,it has specific functions of 3D displaying,analyzing and operating on spatial objects under a 3D system.Taking Nanjing University of Information Science and Technology as an example,introduced the modelling simulation process of virtual campus based on 3D GIS.It also discussed the key issues which are the essential technology and method of virtual campus simulation about 3D visualization on 3D-scene modelling,modelling optimization and system development design based on Google SketchUp and ArcGIS.The development of functional modules consists of four sub modules,namely 3D scene viewing,attributes query of buildings,path analysis and animation outputting.Finally,the paper addresses some problems involved in this system,and puts forward thoughts for further study.