计算机工程 ›› 2012, Vol. 38 ›› Issue (17): 261-264.doi: 10.3969/j.issn.1000-3428.2012.17.070

• 工程应用技术与实现 • 上一篇    下一篇

基于数字地球的林火灾害建模

吴玲达1,2,曹 叡1,杨 超1,蒋 杰2   

  1. (1. 装备学院重点实验室,北京 101416;2. 国防科学技术大学信息系统工程实验室,长沙 410073)
  • 收稿日期:2011-09-29 修回日期:2011-12-08 出版日期:2012-09-05 发布日期:2012-09-03
  • 作者简介:吴玲达(1962-),女,博士、博士生导师,主研方向:多媒体信息系统,虚拟现实,空间信息获取与处理;曹 叡,博士研究生;杨 超、蒋 杰,博士
  • 基金项目:
    国家“863”计划基金资助项目(2009AA01Z335);国家部委基金资助项目

Forest Fire Disaster Modeling Based on Digital Earth

WU Ling-da 1,2, CAO Rui 1, YANG Chao 1, JIANG Jie 2   

  1. (1. Key Laboratory, Academy of Equipment, Beijing 101416, China; 2. Laboratory of Information System Engineering, National University of Defense Technology, Changsha 410073, China)
  • Received:2011-09-29 Revised:2011-12-08 Online:2012-09-05 Published:2012-09-03

摘要: 针对数字地球上林火灾害可视化问题,建立林火灾害仿真可视化框架。设计蔓延表现算法,采用Rothermel火行为计算模型和邻接单元蔓延模型。提出一种网格均匀划分的简化模型,进行仿真实验。结果表明,该方法能在数字地球上表达林火蔓延过程,较好地描述林火蔓延物理机理,为三维地理环境上的灾害分析提供辅助支持。

关键词: 数字地球, 林火灾害, Rothermel模型, 邻接单元模型, 网格划分, 等角投影

Abstract: According to the problem of forest fire disaster visualization based on digital earth, forest fire simulation visualization framework is established. Specific spread rendering algorithm is designed, adopting Rothermel fire behavior model and contiguous cellular spread model. An equiangle mesh generation simplification model is proposed. Simulation experiment is carried out. The result indicates the proposed model can simulate forest fire spread process on digital earth and well describe fire spread physics mechanism, which provides disaster analysis and decision support in three-dimensional geographic environment.

Key words: digital earth, forest fire disaster, Rothermel model, contiguous cellular model, mesh generation, equiangle projection

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