利用机载激光点云数据生产DEM的关键技术分析  

Key Technologies Analysis of DEM Production Based on LiDAR Data

作　　者：蒋桂美 聂倩[1] 陈小松[1] 

机构地区：[1]宁波市测绘设计研究院,浙江宁波315042

出　　处：《测绘通报》2017年第6期90-93,共4页Bulletin of Surveying and Mapping

基　　金：宁波市科协资助项目(X201601-3)

摘　　要：着重分析了利用机载激光点云数据提取DEM的关键技术:预处理、点云滤波与分类、高精度DEM制作与质量评价技术;建立了基于机载激光点云的DEM生产技术流程,并将其应用于宁波市地理国情普查市情专项——高精度地表模型制作项目中;构建了宁波市建成区规则格网1∶2000比例尺的高精度DEM模型,为宁波市地理国情普查提供了数据基础。The paper focuses on the analysis of the key steps of extracting DEM from airborne-LiDAR data, including point cloud data preprocessing, the data filtering and classification, high precision DEM manufacturing and quality evaluation. In this paper, the DEM production technology process based on airborne-LiDAR data is established, and will be used on a city situation special survey of geographical conditions：high precision surface modeling project in Ningbo. A high precision DEM model of 1：2000 scale rule grid of Ningbo built-up area is constructed which provides a data base for the survey of geographical conditions in Ningbo.

关 键 词：机载LIDAR 激光点云 DEM 

分 类 号：P23[天文地球—摄影测量与遥感]