三维激光扫描技术获取高精度DTM的应用研究

三维激光扫描技术又被称为实景复制技术,是测绘领域继GPS技术之后的又一次技术革命,它突破了传统的单点测量方法,具有高效率、高精度的独特优势。三维激光扫描技术能够提供扫描物体表面的三维点云数据,因此可以用于获取高精度高分辨率的数字地形模型。本文将以一工程边坡为例讨论利用三维激光扫描技术快速获取数字地形模型的方法,着重论述三维点云数据的获取、拼接、坐标校正、去噪及数字高程模型的生成方法,由此得出在一定空间范围内利用三维激光扫描技术快速获取高精度高分辨率的数字地形模型具有可行性。

RESEARCH ON APPLICATION OF 3D LASER SCANNING TECHNOLOGY IN ACQUIRING DTM WITH HIGH ACCURACY AND RESOLUTION

The three-dimensional laser scan technology.also named the real-life scenery duplication technique,is another important technological revolution in surveying and mapping field after the Global Position System(GPS) technology.It has high efficiency and high precision.The three-dimensional point cloud data of the scanned object surface can be acquired by using the three-dimensional laser scan technology.Therefore,the technology can be used in gaining digital terrain models(DTM) with high accuracy and resolution.This paper will discuss the method of using the technology in quickly gaining DTM.A cut slope project is used as example.The method includes acquiring,aligning,coordinate adjusting,,de-noising and formating of digital elevation model.It is feasibility that the high accurate and resolution digital terrain model can be acquired using the technology within certain space.