Method to extract the center line of a complex road based on walking trajectory
LI Junjie1,2 ， LIU Pengcheng2 ， DONYU Dorjee3,1
1.School of Remote Sensing and Information Engineering， Wuhan University， Wuhan 430079， China；2.Key Laboratroy for Geographical Process Analysis & Sinulation of Hubei Province/School of Urban and Environmental Science， Central China Normal University， Wuhan 430079，China；3.Meteorological Bureau of Tibet Autonomous Region， Lhasa 850000，China
Abstract：Traditional road network extraction based on GPS trajectory focuses more on using vehicle-mounted GPS trajectory data to extract urban lane-level road network， while ignoring complex road information in small areas such as campus， community and scenic spots. Therefore， this paper proposed a method to extract complex road center line based on walking GPS trajectory data. Firstly the data was cleaned， then GPS trajectories were rasterized based on the distribution density of points， and zhang-suen rapid refinement algorithm was used to refine the grid network to obtain the road center line. Finally， the improved tracking method was used to realize the vectorization of road network. The paper took the campus of Central China Normal University as the experimental area， and extracted the campus road network with mixed vehicles and small roads， which proves the effectiveness of the method.
李俊杰,刘鹏程,顿玉多吉,. 基于步行轨迹的复杂道路中心线提取方法[J]. 华中师范大学学报(自然科学版), 2020, 54(1): 89-95.
LI Junjie,LIU Pengcheng,DONYU Dorjee,. Method to extract the center line of a complex road based on walking trajectory. journal1, 2020, 54(1): 89-95.
2020, Vol. 54 
