CAJ | 학술논문

准确提取和及时更新路网信息，对于道路规划和车辆导航等方面至关重要。目前，基于GPS轨迹的路网提取方法一般是从浮动车或出租车的GPS轨迹中挖掘城市主干路网。然而，现有方法忽略了小路的自动提取，它对于抗震救灾、小区导航或乡村游览等场合非常重要。因此，本文提出基于步行GPS轨迹的路网提取方法，分为数据预处理、道路中心线生成和路网精度评价3个部分。其中，先后采用轨迹点聚类、聚类点分割和中心线拟合等方法生成道路中心线。通过自行采集的步行GPS数据进行实验，结果表明，本文方法能够准确提取路网，覆盖率可达96．21％，而误检率仅3．26％；并且能够提取小路和更新路网。
준학제취화급시경신로망신식，대우도로규화화차량도항등방면지관중요。목전，기우GPS궤적적로망제취방법일반시종부동차혹출조차적GPS궤적중알굴성시주간로망。연이，현유방법홀략료소로적자동제취，타대우항진구재、소구도항혹향촌유람등장합비상중요。인차，본문제출기우보행GPS궤적적로망제취방법，분위수거예처리、도로중심선생성화로망정도평개3개부분。기중，선후채용궤적점취류、취류점분할화중심선의합등방법생성도로중심선。통과자행채집적보행GPS수거진행실험，결과표명，본문방법능구준학제취로망，복개솔가체96．21％，이오검솔부3．26％；병차능구제취소로화경신로망。
Accurately extracting and timely updating the information of road network is vital to road planning and vehicle naviga -tion.Currently, the road network’s extraction method for mining urban trunk roads , based on GPS trajectories, commonly uses floating car or taxi .However , the existing methods ignore the automatic extraction of pathway , which is very important for earth-quake relief , community navigation and village tour and other occasions .Therefore , this paper proposes a new method of road network extraction , based on walking GPS trajectories , which consists of three parts:data preprocessing , road centerline genera-tion and road network accuracy evaluation .In this paper , three methods are adopted to generate road centerlines successively , such as trajectories clustering , cluster center segmentation and centerline fitting .Making experiment with self-collected walking GPS data, the results show that the proposed method not only is able to accurately extract the road network , coverage rate can reach 96.21%while error detection rate was 3.26%, but also can extract pathway and update road network .