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author:

Jiao, Huaijin (Jiao, Huaijin.) [1] | Chen, Chongcheng (Chen, Chongcheng.) [2] (Scholars:陈崇成) | Huang, Hongyu (Huang, Hongyu.) [3]

Indexed by:

EI Scopus PKU CSCD

Abstract:

Global Ecosystem Dynamics Investigation (GEDI) and Ice, Cloud, and land Elevation Satellite- 2 (ICESat- 2) products provide reliable global references for the accuracy evaluation and correction of Global Digital Elevation Model (GDEM). However, existing DEM correction methods mainly address the signal of vegetation in DEM errors and mostly use linear regression models. So, we first analyze the relationship between Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) GDEM v3 data accuracy and the land cover type, elevation, slope, relief amplitude, and vegetation coverage. Based on this, this paper proposes a Digital Elevation Model (DEM) error correction method that takes into account various influencing factors and combines Extreme Gradient Boosting (XGBoost) machine learning and spatial interpolation to model the errors. The analysis of the results shows that the overall error of the original ASTER GDEM has a normal distribution with a large negative offset (average error of - 3.463 m). The Mean Absolute Error (MAE) and Root Mean Squared Error (RMSE) of original ASTER GDEM are 12.930 m and 16.695 m, respectively, and the elevation accuracy decreases with the increase of elevation, slope, relief amplitude, and vegetation coverage. After correction, the Mean Error (ME) of ASTER GDEM is reduced to -0.233 m, which means the negative deviation is effectively removed and the overall MAE and overall RMSE are reduced by 26.04% and 23.56%, respectively. The MAE and RMSE of DEM for cultivated lands, forests, grasslands, wetlands, water bodies, and man-made surfaces are all reduced by different degrees. The DEM accuracy evaluation and correction method proposed in this paper models the non-linear relationships between multiple feature elements and terrain errors and achieves better correction results in the study area. © 2023 Journal of Geo-Information Science. All rights reserved.

Keyword:

Adaptive boosting Digital instruments Error correction Forestry Geomorphology Interpolation Landforms Mean square error Normal distribution Regression analysis Surveying Vegetation

Community:

  • [ 1 ] [Jiao, Huaijin]National Engineering Research Center of Geospatial Information Technology, Fuzhou University, Fuzhou; 350108, China
  • [ 2 ] [Jiao, Huaijin]Key Lab of Spatial Data Mining and Information Sharing of Ministry of Education, Fuzhou University, Fuzhou; 350108, China
  • [ 3 ] [Chen, Chongcheng]National Engineering Research Center of Geospatial Information Technology, Fuzhou University, Fuzhou; 350108, China
  • [ 4 ] [Chen, Chongcheng]Key Lab of Spatial Data Mining and Information Sharing of Ministry of Education, Fuzhou University, Fuzhou; 350108, China
  • [ 5 ] [Huang, Hongyu]National Engineering Research Center of Geospatial Information Technology, Fuzhou University, Fuzhou; 350108, China
  • [ 6 ] [Huang, Hongyu]Key Lab of Spatial Data Mining and Information Sharing of Ministry of Education, Fuzhou University, Fuzhou; 350108, China

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Source :

Journal of Geo-Information Science

ISSN: 1560-8999

CN: 11-5809/P

Year: 2023

Issue: 2

Volume: 25

Page: 409-420

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 2

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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