【摘要】 数字摄影测量技术正从单机工作方式向系统集成的工作方式转变,获取和处理空间数据已变得较为容易。在三维数字城市建筑物建模方面,要求必须快速有效地提取建筑物边界,才有可能进行快速的三维景观建模作业。本文提出了利用DSM和真正射影像相结合构建地形景观的一种新方法,首先从真正射影像上提取建筑物的边界线,对建筑物多边形进行三角化处理,视地面模型为一带洞多边形,同样进行Delaunay三角化处理,接着从DSM和DEM获取建筑物的高度信息,构建三维建筑物模型,最后通过纹理映射的方式,对整个建模场景进行纹理贴图,这一方法取得了较好效果,已经在生产实践中得到了应用。更多还原

【Abstract】 The work mode of digital photogrammetry technology is shifting from standalone to systems integration,it is easy to acquire and process the spatial data now.To build 3D city model rapidly,a fast,efficient way to extract building’s border is needed.A new method,using DSM and True Orthoimage to construct terrain and building model,is proposed.The first step is to extract the building boundary line from True Orthoimage,and then triangulate the building polygon.Taking the terrain model as a polygon with many holes,the paper triangulates this terrain polygon with Delaunay algorithm.By getting the height of buildings from the DSM and DEM data sets,the 3D building model can be constructed.After texture mapping,the whole modeling scene is treated with True Orthoimage texture.As a new method,it achieves good results and has been applied in practice.更多还原