Dr. Sohn’s research focused on developing fundamental theories and working systems to generate photo-realistic, highly accurate and large-scale 3D urban space models from remotely sensed data. His laboratory is leading the field in developing the implicit modeling approach for 3D building rooftop reconstruction using aerial laser point clouds and imagery. His research group is of the few groups in the world that has made significant contributions in the area of suspension type power line mapping and modeling from aerial laser point clouds and they are one of the first groups to successfully develop a dynamic 3D web mapping system infusing ubiquitous and real-time information into the otherwise static 3D virtual space engine (e.g. Google Earth).