介绍了高精度DEM数据采集的新技术。应用地面三维激光扫描Terrestrial Laserscanning（TLS）系统对小流域进行扫描获取点云数据，经分析处理生成高精度DEM，并对拼接误差进行评价。实践表明，三维激光扫描系统适用于小流域高精度DEM数据采集。

A new data acquisition technology of high resolution DEM is presented. The terrestrial laserscanning (TLS) system is used to capture data of point clouds. A high resolution DEM is created by data processing. Then the registration error is evaluated. The practice of the TLS system has demonstrated that this new technique can be used in creating high resolution DEM of a small watershed.