标题

A Digital Terrain Modeling Method in Urban Areas by the ICESat-2 (Generating precise terrain surface profiles from photon-counting technology)

作者

Osama Nahed, YangBisheng, MaYue, Freeshah Mohamed

来源

Photogrammetric Engineering and Remote Sensing

摘要

ICE、云和陆地高程卫星 2 (ICESat-2) 可以通过光子计数技术提供地球高程的新测量值。大多数研究都集中在提取植被区域的地面和树冠光子。然而，从植被与人工建筑混合的城市地区提取地面光子尚未得到充分研究。本文提出了一种估算城市地区地表高程的新方法。 ICESat-2信号光子是通过改进的基于密度的噪声应用空间聚类算法和先进的地形激光高度计系统算法检测到的。 Advanced Land Observing Satellite-1 PALSAR 衍生的数字表面模型已被用于将地形表面与 ICESat-2 数据分离。使用一组地面实况数据来评估这两种方法的精度，达到的精度高达 2.7 cm，这使得我们的方法在确定城市场景中的地面高程时有效且准确。

Abstract

The ICE, Cloud and land Elevation Satellite-2 (ICESat-2) can provide new measurements of the Earth's elevations through photon-counting technology. Most research has focused on extracting the ground and the canopy photons in vegetated areas. Yet the extraction of the ground photons from urban areas, where the vegetation is mixed with artificial constructions , has not been fully investigated. This article proposes a new method to estimate the ground surface elevations in urban areas. The ICESat-2 signal photons were detected by the improved Density-Based Spatial Clustering of Applications with Noise algorithm and the Advanced Topographic Laser Altimeter System algorithm. The Advanced Land Observing Satellite-1 PALSAR-derived digital surface model has been utilized to separate the terrain surface from the ICESat-2 data. A set of ground-truth data was used to evaluate the accuracy of these two methods, and the achieved accuracy was up to 2.7 cm, which makes our method effective and accurate in determining the ground elevation in urban scenes.