基于机载 Lidar 的地貌数据快速更新方案研究

摘要

空间地理信息作为国家信息资源的重要组成部分之一，承担着越来越重要的作用，地貌数据作为空间数据的组成部分，其数据采集及更新十分重要。机载 Lidar 问世以来受到测绘行业广泛重视，其应用不断扩展。该文以地貌数据的快速更新为研究目的，深入分析了地貌更新流程以及机载 Lidar 数据成果，并在此之上提出基于机载 Lidar 数据的地貌快速更新方案，研究其具体步骤以及核心技术，同时采用 CAD 二次开发实现地貌更新数据预处理，大幅提高地貌更新效率。%Spatial information is one of the important components of national information resources.It plays more and more important role.As parts of spatial data,acquisition and update of geomorphic data are very important. Since the advent of airborne Lidar,its applications continue to expand.With the rapid update geomorphic data for research purposes,after deep analysis on the features of airborne Lidar data and update process of geomorphic da-ta,fast update method based on airborne Lidar data has been put forward.Specific steps and the core technology of this method have been introduced.At the same time,data preprocessing based on secondary development of CAD has been carried out,which will greatly improve the efficiency of updating landform data.