基于DEM三维地层建模及一体化显示  

3D Strata Modeling and Integrative Visualization Based on DEM

作　　者：乔金海[1] 潘懋[1] 金毅[1,2] 李兆亮[1] 赵增玉[1] 

机构地区：[1]北京大学造山带与地壳演化教育部重点实验室,北京100871 [2]河南理工大学资源与环境学院,河南焦作454000

出　　处：《地理与地理信息科学》2011年第2期34-37,共4页Geography and Geo-Information Science

基　　金：国家自然科学基金项目(40742015)

摘　　要：目前三维地层表面建模方法构建的三维地层模型上表面粗糙,与地形不一致。在分析当前建模方法缺陷的基础上,基于多层DEM建模思想,提出了利用DEM修正主TIN的建模方法;该方法可保证模型与地形的空间一致性,实现模型与地理数据的一体化显示。并提出了利用虚拟钻孔进行剖面图离散化处理,将建模数据源统一为钻孔数据,从而将剖面图融入实际建模流程,解决了单一钻孔数据导致建模结果不精确及模型无法修正的问题,也简化了多源数据导致建模方法复杂的问题。最后以合肥市某区为例,展示了该方法的实现过程及建模效果。Three dimensional strata model,constructed by the published modeling approaches, is inconsistent to the terrain. On the basis of analyzing the defect of the published modeling methods, the authors present a modeling method based on primary TIN adjusted by DEM. The method is based on multilayer DEM which has been used by others. Spatial coupling between model and terrain can be ensured based on the method presented. Visualization of model integrated with geographical data can be realized based on the primary TIN adjusted by DEM. And a method which converts section map into boreholes has been put forward. The method solves the problem of imprecise and unmodifiable modeling caused by only using borehole data. The method also simplifies the complexity of modeling by using unified borehole data. Finally, the practical effect and process of the modeling is shown in a case study,the sampling area locates in Hefei. The results demonstrate the validity of method presented based on DEM.

关 键 词：DEM 剖面图 三维地层建模 一体化显示 

分 类 号：P208[天文地球—地图制图学与地理信息工程]