摘要
高分辨率无人机影像相对于卫星影像能提供更多的形状、纹理以及地表信息,在地形的三维重建方面有着独特的优势。中国西部很多区域位于高原地带,地形多以中、高山地为主,采用常规测图方法获取地形图难度较大。文中提出一种通过自动匹配生成离散点来构建TIN及优化的方法,辅以少量人机交互修改,最终生成DEM,完成三维建模。研究结果表明方法在平坦地区能够满足1∶1 000三维地形构建的要求,工作效率提高两倍;在山地区域满足1∶2 000三维地形构建要求,工作效率提高4倍。
High resolution UAV image relative to the satellite imagery can provide more shape, texture and surface information, which has a unique advantage in the aspects of 3D reconstruction of terrain. Many regions of Chinese west are in the plateau zone with mountainous terrain primarily. So the conventional mapping method to obtain the topography maps is very difficult. How to use new technology to improve the efficiency of terrain data acquisition becomes the main problem of 3D terrain modeling. A method which constructs and optimizes TIN through automatic match generating discrete points is proposed with a few man-machine interaction revision which can produce DEM and complete 3D modeling. The results of research shows that this method can meet the requirements of 1 ： 1 000 3D terrain construction in the plain area, and working efficiency is increased by 2 times; in the mountain area, this method can meet 1 ： 2 000 requirements of 3D terrain construction, and working efficiencv is increased hv zt tirnog
出处
《测绘工程》
CSCD
2014年第3期36-41,共6页
Engineering of Surveying and Mapping
基金
国家自然科学基金资助项目(41161062)
