基于高精度 DSM 的建筑物高程信息提取

摘要

3 D city model applied more and more widely ,with its ample spatial information and intuitionistic expres-sion.As an important part of the urban areas , the construction and inspection of the three-dimensional model of the buildings is very important .This paper discusses the methods used high-precision DSM point cloud data to extract the building ’ s roof elevation .Validate method ’ s high accuracy by RTK and three-dimensional acquisition .And the height precision roof elevation can correct the three-dimensional model of the building .%三维城市模型以其丰富的空间信息、真实直观的表达方式，应用越来越广泛。建筑物作为城市区域的一个重要特征，其三维模型建设以及模型检查将显得非常重要。本文探讨了利用高精度DSM点云数据准确提取建筑物高程的方法，并采用RTK外业实测和立体模型采集方法证明该方法提取建筑物高程的精度可达亚米级，表明该方法可用于批量修正三维建筑物模型的高度。