Effective visibility analysis method in virtual geographic environment

摘要：

Visibility analysis in virtual geographic environment has broad applications in many aspects in social life.But in practical use it is urged to improve the efficiency and accuracy,as well as to consider human vision restriction.The paper firstly introduces a high-efficient 3D data modeling method,which generates and organizes 3D data model using R-tree and LOD techniques.Then a new visibility algorithm which can realize real-time viewshed calculation considering the shelter of DEM and 3D building models and some restrictions of human eye to the viewshed generation.Finally an experiment is conducted to prove the visibility analysis calculation quickly and accurately which can meet the demand of digital city applications.

关键词： visibility analysis sightline DEM 3D data model

作者: LI Yi ZHU Qing GONG Jianhua

作者单位: State Key Laboratory of Remote Sensing Science Institute of Remote Sensing Applications,CAS 3 Datun State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan Univer State Key Laboratory of Remote Sensing Science Institute of Remote Sensing Applications,CAS 3 Datun

会议类型: 国际会议

会议名称: 第16届国际地理信息科学与技术大会(16th International Conference on GeoInformatics and the Joint Conference)

会议地点: 广州

会议语种:英文

在线出版日期: 2008-06-28（万方平台首次上网日期，不代表论文的发表时间）