地学现象三维空间模拟-以点源烟气扩散为例  

Three Dimensional Spatial Simulation of Geo-Phenomena: Taking Smoke Diffusion from Point Sources as an Example

作　　者：盛业华[1] 刘平[1] 袁林旺[1] 叶春[1] 黄云[1] 黄亮[1] 

机构地区：[1]南京师范大学地理信息科学江苏省重点实验室,南京210097

出　　处：《地球信息科学》2005年第3期16-20,共5页Geo-information Science

基　　金：南京师范大学重点项目"虚拟地理环境下三维地理空间数据模型与数据处理方法研究"(2004105XGQ2646).

摘　　要：探讨地学现象三维空间模拟的方法。将地学现象所在的三维空间以规则六面体格网形式离散为一个个相互连接的格网单元,运用相应地学模型计算规则六面体各顶点的属性值,再用MC方法追踪形成等值面,以此来表示地学现象的三维空间状态。以点源烟气扩散中烟气的三维浓度模拟为例,验证了这一空间模拟方法的有效性和直观性。The problem of three-dimensional spatial simulation is discussed in this paper. Firstly, the threedimensional space where any geo-phenomenon is located is discretized in regular hexahedrons which topology and geometry are simple. Secondly, the attribute of every vertex in each hexahedron cell is calculated with the appreciate geo-model. Finally, the marching cube approach is used to process the scalar values of every vertex and the isosurface is tracked. The resulted iso-surface and further processed three dimensional contours are used to express the distribution and state of this geo-phenomenon. The smoke concentration in three-dimensional space pervaded from point sources is simulated with this simulating approach. The result shows that this three-dimensional simulation approach is effective and intuitionistic.

关 键 词：地学现象 空间模拟 空间离散 等值面 烟气扩散 

分 类 号：P208[天文地球—地图制图学与地理信息工程] TP391[天文地球—测绘科学与技术]