Sentinel-2 remote sensing 18 Research & information: general 15 random forest 10 machine learning 9 Sentinel-1 8 UAV 7 LiDAR 6 MODIS 6 NDVI 6 SAR 6 deep learning 6 History of engineering & technology 5 Landsat 5 classification 5 vegetation index 5 vegetation indices 5 Google Earth Engine 4 LAI 4 Technology: general issues 4 change detection 4 drone 4 drought 4 hyperspectral 4 land cover 4 land subsidence 4 monitoring 4 synthetic aperture radar 4 3D point cloud 3 GNSS 3