Earth System Science Data
Earth System Science Data
Earth System Science Data
Articles | Volume 18, issue 7
Articles | Volume 18, issue 7
https://doi.org/10.5194/essd-18-4563-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/essd-18-4563-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 18, issue 7
Data description article
 | Highlight paper
 | 
03 Jul 2026
Data description article | Highlight paper |  | 03 Jul 2026

NZ-BeachTopo30: a national-scale and full-coverage 30 m beach topography dataset for New Zealand reconstructed by fusing ICESat-2 and Sentinel-2

Yuhao Wang, Hao Xu, Nan Xu, Edward Park, Xuejiao Hou, Jiayi Fang, Zhen Zhang, Yongjing Mao, Huichao Xin, Chunpeng Chen, Yinxia Cao, Yifu Ou, Xinyue Gu, Wenyu Li, Xiaojuan Liu, Conghong Huang, and Qingquan Li

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Editorial statement
Although the study has a narrow focus on New Zealand's shores, it stands as an exemplary paper in identifying a clear research gap and motivating the need for this data set. It effectively demonstrates how applying a rigorous methodology can corroborate physical realism while utilizing indirect observations with remote sensing and machine learning. This, coupled with the discussion on strengths and weaknesses, underscores the relevance of the data set for the target community and a potential broader audience.
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Short summary
We developed NZ-BeachTopo30, a full-coverage 30 m beach topography dataset for New Zealand, by integrating Ice, Cloud, and land Elevation Satellite-2 (ICESat-2) and Sentinel-2 data with extreme gradient boosting (XGBoost). It expands valid intertidal coverage by 145.8 % and achieves a 0.94 m root mean square error against airborne light detection and ranging (airborne LiDAR) data, supporting sea-level rise and coastal erosion planning.
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