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首页> 外文期刊>Journal of geovisualization and spatial analysis >Defining the Boundaries of Urban Built-up Area Based on Taxi Trajectories: a Case Study of Beijing
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Defining the Boundaries of Urban Built-up Area Based on Taxi Trajectories: a Case Study of Beijing

机译：定义的边界城市人口密集的地方基于出租车轨迹:一个案例研究北京

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摘要

The urban built-up area is of great significance for urban planning, construction, and management, and is an important index to measure the degree of urbanization. This study reviews the definitions of the urban built-up area in different countries and analyzes its basic characteristics. The rational and advantages of defining the urban built-up area using taxi trajectory data are described. First, we preprocessed these data and used the density-based spatial clustering of applications with noise (DBSCAN) algorithm to cluster the trajectory points. The urban built-up area was defined by the boundaries of each cluster of trajectory points, generated using the Delaunay triangulation method. A parameter decision model was assessed to determine the best-suited parameter for the clustering algorithm. The taxi trajectory data in Beijing were taken as the experimental data, and the urban built-up area generated according to the proposed method shows high consistency with remote sensing images. The results with the proposed method show that the urban built-up area of Beijing comprises a main area and several suburban areas. The main part appears in block form, with some bulges distributed along the city's main roads. The suburban areas serve as special functional areas of the city and surrounding towns.
机译：城市建筑面积具有重要意义为城市规划、建设和管理,和是一个重要的指标来衡量的程度城市化。定义的城市人口密集的地方不同的国家,分析它的基本特征。定义城市人口密集的地方使用出租车轨迹数据。预处理和使用这些数据density-based空间聚类的应用程序集群与噪声(DBSCAN)算法轨迹点。每个集群的边界的定义轨迹点,使用德劳内生成三角测量的方法。进行评估,以确定最适合聚类算法的参数。在北京拍摄的轨迹数据实验数据和城市人口密集的地方根据该方法显示了生成的高一致性与遥感图像。结果表明,提出的方法北京城市建筑面积包括一个主要的区域和几个郊区。出现在块形式,有一些凸起分布在城市的主要道路。郊区作为特殊的功能区域周围的城市和城镇。

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