摘要
在利用机载Li DAR数据生成的等高线进行建筑物检测过程中,通过对地图等高线的拓扑关系和建筑物等高线特点进行分析,得出了建筑物等高线拓扑关系的一般性描述。在此基础上,根据等高线的高程信息并采用点在多边形内的判断方法,提出了一种基于父节点跟踪的建筑物等高线树快速构建算法。通过对一建筑物和植被混杂区域的Li DAR数据进行实验,验证了本文提出的等高线树构建方法的有效性,实现了建筑物等高线的高效、有序管理。
In the process of buildings detection with contours by using airborne Li DAR data,the generic topological relationship description of building contours were concluded by analyzing the topological relationship of contour maps and features of the building contours. On this basis,according to the contours＇ elevation information and using the method which named point inside the polygon judgment,a fast contour tree construction algorithm based on tracking of parent nodes is proposed and the efficient and orderly management of building contours is achieved.
出处
《测绘地理信息》
2015年第5期21-24,共4页
Journal of Geomatics
基金
国家自然科学青年基金资助项目(41401497)
湖南省教育厅研究资助项目(13C325)
关键词
LIDAR
空间关系
拓扑关系
等高线树
LiDAR
spatial relationship
topological relationship
contours tree
