Abstract: There are two kinds of vegetation modeling：modeling of single tree and modeling of scene.Single tree modeling can be subdivided into botany-based and computer graphics-based method.Part I of the paper is devoted to the software，techniques and applications of single tree modeling.Three well-developed modeling tools：L-system，AMAP and Xfrog is discussed and compared in detail in this part.Part II is about the modeling of scene：DEM to visualize the terrain，landscape design and then，modeling the“virtual world”.A review of regular methods is put forward first，followed with a survey of the ways to increase modeling speed，flyover fps and improve the visual impact.Finally this paper summarizes the exiting issues and highlight the perspectives of further research and applications.

Key words: virtual plant, landscape design, scene modeling

摘要： 植被三维建模可分为单木建模和场景建模两个尺度。第一部分总结了单木建模的两类方法：基于植物学的和基于图形学的方法；分别介绍了GOSSYM模型、AMAP、L-studio和Xfrog等单木建模软件以及其他建模方法和单木模型的应用。第二部分介绍了场景建模：包括场景的基础DEM、景观设计、建立虚拟场景三部分。总结了建立场景常用的方法；改进算法以提高建模和漫游效率、增加真实性。最后总结了在该领域仍存在的问题和应用的发展方向。

关键词: 虚拟植物, 景观设计, 场景建模