摘要
在概述了GIS技术发展现状的基础上 ,提出了发展基于平面矢量数据的三维可视化技术 .该技术采用构造的实体几何法来表达三维空间物体 ,将简单的实体通过集合运算组成所需要的物体 .提出绘制平面多边形的算法、直接拉伸法、角度拉伸法、弧度拉伸法和球体拉伸法 5种简单实体的实现方法 .通过它们之间的组合使用得到复杂的三维物体 .
The work presented here summarizes the development of geographic information system.And we put forward to develop 3D visualization technology based on plane vector data.This technology uses constructive solid geometry method whose main idea is to combine simple entities by means of setting operation to obtain objects which we need.The article discusses five methods of drawing entities by interactive data language(IDL) in detail.They are respectively named “cover”,“extrude”,“extrude-angle”,“extrude-arc” and “sphere”.Using these five ways,and through their combination,we can get different objects in 3D space.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2004年第9期1197-1201,共5页
Journal of Tongji University:Natural Science
基金
高等学校博士学科点专项科研基金资助项目 (2 0 0 3 0 2 470 43 )
关键词
三维可视化
实体
地理信息系统
矢量化
虚拟现实
D visualization
entity
geographic information system
vector
virtual reality
