Three-dimensional (3D) information 3D building models 1 Advanced informations 1 Antennas 1 Buildings 1 Construction 1 Conventional methods 1 Digital surface models 1 Forest management plans 1 Forestry 1 Image segmentation 1 Imaging systems 1 Klang Valley 1 Malaysia 1 Mapping 1 Open source software 1 Optical radar 1 Palm oil 1 Parameter measurement 1 Photographic image 1 Photography 1 Qualitative assessments 1 Real time acquisition 1 Residential areas 1 Software engineering 1 Three dimensional computer graphics 1 Topographic mapping 1 Tree crown delineation 1 Universal algorithm 1 Unmanned aerial vehicles (UAV) 1