针对三维动态交互地图的可视化问题，探讨了VRML的技术特点及其在解决三维动态交互地图可视化问题中的应用潜力和存在的问题，并采用Visual C^ 与VRML 2．0相结合进行了三维动态交互地图可视化的初步实践，取得了成功的应用。该工作主要集中在：（1）通过北京门头沟地区地形的可视化，探索了VRML表达较大数据量数字地形的能力；（2）开发了三维动态交互地图可视化的原型系统，并在北京人口变化可视化中进行了应用。

D dynamic interactive visualization via Internet becomes the main trend of modern cartography along with the fast development of WWW and Virtual Reality Modeling Language (VRML) which can run in Internet,Intranet and local system.This paper studies on the technical characteristics of VRML and explores the potential of its application to modern cartography.The conceptual approach and prototypical practices have been researched with the combination of Visual C .The main works are focused on (1) the experiment of large data volume of 3D terrain of Beijing area by VRML 2.0; (2) developing a prototype system of 3D dynamic interactive visualization,and applying it to the visualization of Beijing population change.These applications are successful.The experiences in the practices show that VRML 2.0 is limited for interactive dynamic visualization of geo applications. Furthermore,the capabilities of browsers and plug ins influence the display of VRML applications and have to be more standardized.