3龚健雅，Australian Journal of Geodesy Photogrammetry and Surveying，1992年，56期，37页
4DODGE M,DOYLE S,SMITH A,et al,Towards the Virtual City: VR & Internet GIS for Urban Planning [EB/OL].http://www.casa.ucl.ac.uk/publications/birkbeck/vrcity.html.
5HUANG Bo,LIN Hui.GeoVR: A Web-based Tool for Virtual Reality Presentation from 2D GIS Data[J].Computer & Geosciences,1999,25:1 167-1 175.
6HUAI Yong-jian,HAO Chong-yang.Java 3D API for VR Application Systems[J].Journal of Image and Graphics.2000,5(12):1 044-1 048.(in Chinese)
7ZHU Qing,LI De-ren,GONG Jian-ya,et al.The Design and Implementation of CyberCity GIS[J].Journal of Wuhan University (Information Science Edition),2001,26(1):8-11.(in Chinese)
