Generating Digital City by Using Geo-spatial Data from Laser Measurements

Abstract

In the field of urban design and landscape design, efficient and probable methods have been researched and developed to generate a digital city which is an urban model made by using three-dimensional computer graphics. This study tried to automatically generate three-dimensional building models with a roof shape and a facade shape in order to improve probability of landscape simulation in surroundings and an efficient urban modeling on computer graphics. The authors used DSM (Digital Surface Model) data, which is acquired by airborne LIDAR (Light Detection and Ranging), and MMS data, which is acquired by MMS (Mobile Mapping System) also known as mobile LIDAR. A building's roof shape was reproduced and interpreted by the DSM data, and a facade shape was reproduced by the MMS data. Finally, the authors proposed a method of performing these automatically.