基于机载LiDAR数据制作高精度DEM产品研究

机载LiDAR获取点云数据具有快速、高效和高精度的特点,以此为基础制作的DEM数据具有表达地貌细微、精度高的特性。本文以白城地区基础测绘DEM制作项目为例,探讨了LiDAR数据的获取、处理及以此为基础制作高精度DEM过程中的关键影响因素,以及解决方法。为推动"十三五"期间,利用现有的基础测绘现代化高新技术装备——机载激光扫描系统,完成吉林省LiDAR航摄生产1∶10 000 DEM及地貌测绘工作提供借鉴和经验。

Research on High Precision DEM Products Based on Airborne LiDAR Data

The point cloud data acquainted by Airborne LiDAR has the characteristics of fast,high efficiency and high precision.This paper,taking the basic surveying and mapping DEM (digital elevation model)production project of the Baicheng area as an example,discusses the key factors and the solutions in LiDAR data acquisition,processing and DEM production.During the 13th Five-Year Plan period,we aim to providethe experience for completing the province's LiDAR aerial production of 1∶10 000 DEM and geomorphological mapping work,using existing basic surveying and mapping equipment-airborne laser scanning system,which is of modem high technology.