<b>Leveraging Chinese GaoFen-7 imagery for high-resolution building height estimation in multiple cities</b>

This is a building height dataset estimated from Chinese Gaofen-7 imagery. The estimated building heights in the different cities (Tianjin, Lanzhou, Chongqing, Ningbo, Guangzhou, and Shenzhen) are highly consistent with the reference building height data obtained from field-measured building height data, building floor data, and airborne light detection and ranging (LiDAR) data. The R² varies from 0.75 to 0.90, while the root mean square error (RMSE) ranges from 4.06 m to 8.06 m. The validation of the estimated building heights over 106,366 buildings using airborne LiDAR height data yielded R² and RMSE of 0.90 and 6.72 m for Shenzhen and 0.89 and 4.06 m for Hong Kong, respectively. Note that the Viewing angles for the GF-7Backward image are -5°, so there is a small offset between the building roof derived from GF-7 image and the building roof derived from other images. Reference: https://doi.org/10.1016/j.rse.2023.113802.

本数据集为基于中国高分七号（Gaofen-7）遥感影像估算得到的建筑高度数据集。针对天津、兰州、重庆、宁波、广州及深圳等多个城市的估算建筑高度，与通过实地实测建筑高度数据、建筑楼层数据以及机载激光雷达（LiDAR）数据获取的参考建筑高度数据具有极高一致性。其中决定系数（R²）介于0.75至0.90之间，均方根误差（RMSE）则处于4.06米至8.06米的区间内。针对106366栋建筑的估算建筑高度，通过机载LiDAR高度数据开展验证的结果显示：深圳的决定系数与均方根误差分别为0.90和6.72米，香港则分别为0.89和4.06米。需注意的是，GF-7后向影像的观测角为-5°，因此通过GF-7影像提取的建筑屋顶与其他影像提取的建筑屋顶之间存在微小偏移。参考文献：https://doi.org/10.1016/j.rse.2023.113802.