基于道路交叉点邻域扩张曲线的城市边界识别——以成都、西安、武汉、南京和长沙为例

林晓娟, 房世峰, 徐亚莉, 邹宝裕, 罗明良

Identifying urban boundaries by clustering street node based on neighborhood dilation curve:A case study of Chengdu, Xi'an, Wuhan, Nanjing and Changsha

Xiaojuan LIN, Shifeng FANG, Yali XU, Baoyu ZOU, Mingliang LUO

表1 成都市城市边界识别过程

Tab.1 The process of Chengdu city boundary identification

搜索半径/m 集群数目/个 最大集群面积/km2 lg(r) log(N) 30 58609 1.8814 1.4771 4.7680 60 26068 130.0276 1.7782 4.4161 90 16471 373.5820 1.9542 4.2167 120 11202 650.0751 2.0792 4.0493 150 7827 888.4098 2.1761 3.8936 180 5378 1203.3913 2.2553 3.7306 210 3592 1725.4802 2.3222 3.5553 240 2295 2268.6984 2.3802 3.3608 270 1425 2676.9900 2.4314 3.1538 300 832 3394.7753 2.4771 2.9201 330 505 4484.4668 2.5185 2.7033 360 317 4937.5135 2.5563 2.5011 390 199 5289.0576 2.5911 2.2989 420 129 5612.1670 2.6232 2.1106 450 87 5836.9844 2.6532 1.9395