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桥梁三维信息是构建三维数字城市和虚拟地球重要的基础空间信息。快速准确地提取桥梁边界线信息是桥梁三维提取的核心问题,也是目前的研究热点。提出了一种基于航空LiDAR数据的桥梁提取方法。该方法最大的优点是采用基于知识引导进行桥梁边界线提取,通过分析桥梁的空间结构特征和几何特征,较好地提取出桥梁边界线。通过与专家人工桥梁判读的结果比较,该方法提取结果具有较高的精度。
Bridge 3D information is to build three-dimensional digital city and virtual earth important basic spatial information. The fast and accurate extraction of bridge boundary information is the core issue of 3D extraction of bridges and is also a hot research topic at present. A bridge extraction method based on aviation LiDAR data is proposed. The biggest advantage of this method is that the bridge boundary line is extracted based on knowledge guidance. By analyzing the spatial and geometrical characteristics of the bridge, the boundary line of the bridge is well extracted. Compared with the result of expert artificial bridge interpretation, the result of this method has higher accuracy.