LiDAR remote sensing 12 Research & information: general 9 Sentinel-2 6 deep learning 6 History of engineering & technology 5 Technology: general issues 5 UAV 5 aboveground biomass 5 machine learning 5 photogrammetry 5 random forest 5 China 4 GIS 4 SAR 4 classification 4 monitoring 4 point cloud 4 point clouds 4 terrestrial laser scanning 4 transfer learning 4 Africa 3 Landsat 3 TLS 3 airborne LiDAR 3 archaeology 3 climate change 3 convolutional neural network 3 data fusion 3 drought 3