Digital surface models 7 Technology: general issues 6 Antennas 4 Forestry 4 History of engineering and technology 4 Unmanned aerial vehicles (UAV) 4 digital terrain model 4 History of engineering & technology 3 lidar 3 Data mining 2 Digital terrain model 2 Extraction 2 GIS 2 Normalized difference vegetation index 2 Optical radar 2 Palm oil 2 Remote sensing 2 Surveying 2 Vegetation 2 accuracy assessment 2 Above ground biomass 1 Above-ground biomass (AGB) 1 Above-ground volume (AGV) 1 Actual measurements 1 Advanced informations 1 Agricultural robots 1 Arcgis softwares 1 Automatic guided vehicles 1 Binary classification 1 Biophysical parameters 1