结合ICESat-2和GEDI数据的高原山区ASTER GDEM数据精度评价与修正

doi:10.13474/j.cnki.11-2246.2026.0612

测绘通报 ›› 2026, Vol. 0 ›› Issue (6): 74-83,91.doi: 10.13474/j.cnki.11-2246.2026.0612

• 学术研究 • 上一篇

结合ICESat-2和GEDI数据的高原山区ASTER GDEM数据精度评价与修正

王颖¹, 陈国坤^1,2,3, 李佳田¹, 钟荣华^4,5,6, 陈志元¹, 高崇¹

1. 昆明理工大学国土资源工程学院, 云南昆明 650093;
2. 云南省定量遥感重点实验室, 云南昆明 650093;
3. 云南省山地灾害空天空地一体化智慧监测国际联合实验室, 云南昆明 650093;
4. 云南大学国际河流与生态安全研究院, 云南昆明 650500;
5. 云南省水土流失防治与绿色发展重点实验室, 云南昆明 650500;
6. 元江干热河谷水土保持云南省野外科学观测研究站, 云南昆明 650091

收稿日期:2025-09-28 发布日期:2026-07-09
通讯作者: 陈国坤。E-mail:chengk@radi.ac.cn
作者简介:王颖(2001—),女,硕士生,研究方向为遥感图像处理与信息分析。E-mail:wang＿ying@stu.kust.edu.cn
基金资助:
云南省基础研究专项面上项目(202501AT070326;202401AT070366);云南省创新引导与科技型企业培育计划(202304BT090019)

Accuracy assessment and correction of ASTER GDEM data for plateau mountainous regions using ICESat-2 and GEDI data

WANG Ying¹, CHEN Guokun^1,2,3, LI Jiatian¹, ZHONG Ronghua^4,5,6, CHEN Zhiyuan¹, GAO Chong¹

1. Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China;
2. Yunnan Key Laboratory of Quantitative Remote Sensing, Kunming 650093, China;
3. Yunnan International Joint Laboratory for Integrated Sky-Ground Intelligent Monitoring of Mountain Hazards, Kunming 650093, China;
4. Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650500, China;
5. Yunnan Key Laboratory of Soil Erosion Prevention and Green Development, Yunnan University, Kunming 650500, China;
6. Yuanjiang Dry-Hot Valley Water and Soil Conservation Observation and Research Station of Yunnan Province, Yunnan University, Kunming 650091, China

Received:2025-09-28 Published:2026-07-09

摘要/Abstract

摘要： [目的] 高精度数字高程模型(DEM)对高原山区的生态评估和灾害风险管理至关重要。本文提出一种基于ASTER GDEM的精度校正方法,旨在生成精度更高且时效性更强的DEM产品。[方法]首先,结合ICESat-2和GEDI激光雷达数据及环境协变量,利用XGBoost模型进行误差建模与校正;然后,通过筛选高质量地形控制点,针对不同土地利用类型构建校正模型;最后,结合空间插值生成修正后的DEM产品。[结果]试验结果表明,校正后ASTER GDEM的ME由39.94 m降至-0.021 m,MAE由40.09 m降至10.49 m,RMSE由41.44 m降至14.59 m,且不同土地覆盖类型下,地形高程与坡度精度显著提高。[结论]本文方法有效提高了ASTER GDEM在云南省高原山区的精度,为复杂地形和生态多样区的DEM精度提升提供了可推广的解决方案,为地形分析和灾害风险评估提供了可靠支持。

关键词: ICESat-2, GEDI, ASTER GDEM, XGBoost模型, GF-7, 数字高程模型校正, 高原山区

Abstract: [Purposes]High-precision digital elevation models are crucial for ecological assessment and disaster risk management in plateau mountainous regions.This paper proposes an accuracy correction method based on ASTER GDEM to generate higher-precision and more timely DEM products.[Methods]Firstly,this study integrates ICESat-2,GEDI LiDAR data,and environmental covariates to perform error modeling and correction using an XGBoost model.Then, high-quality terrain control points are selected to developed land-use-specific correction models.Finally, the corrected elevation estimates are spatially interpolated to generate the refined DEM product.[Findings]Experimental results demonstrate that the corrected ASTER GDEM reduces ME from 39.94 to -0.021 m,MAE from 40.09 to 10.49 m,and RMSE from 41.44 to 14.59 m.Accuracy in terrain elevation and slope significantly improves across diverse land cover types.[Conclusions]The proposed method effectively enhances the accuracy of ASTER GDEM in the highland mountainous regions of Yunnan province.It provides a scalable solution for improving DEM accuracy in complex topography and ecologically diverse areas,offering reliable support for terrain analysis and disaster risk assessment.

Key words: ICESat-2, GEDI, ASTER GDEM, XGBoost model, GF-7, DEM correction, plateau mountainous regions

中图分类号:

P237

王颖, 陈国坤, 李佳田, 钟荣华, 陈志元, 高崇. 结合ICESat-2和GEDI数据的高原山区ASTER GDEM数据精度评价与修正[J]. 测绘通报, 2026, 0(6): 74-83,91.

WANG Ying, CHEN Guokun, LI Jiatian, ZHONG Ronghua, CHEN Zhiyuan, GAO Chong. Accuracy assessment and correction of ASTER GDEM data for plateau mountainous regions using ICESat-2 and GEDI data[J]. Bulletin of Surveying and Mapping, 2026, 0(6): 74-83,91.

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结合ICESat-2和GEDI数据的高原山区ASTER GDEM数据精度评价与修正

Accuracy assessment and correction of ASTER GDEM data for plateau mountainous regions using ICESat-2 and GEDI data

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