基于Webmap的多中心城市空间发展评估方法 ——以上海主城区为例
Study on Polycentric Urban Spatial Development Evaluation Approaches Based on the Webmap: A Case of Shanghai Main Urban Area
陈映雪
上海市规划编审中心 助理规划师，硕士
摘要: 多中心化是发达国家城市发展到城市化中后期应对单中心结构负外部性的重要空间策略。随着我国越来越多的城市尝试以多中心引领空间发展，亟需探索一套可监测和评估其演化动态的支撑方法，网络新数据的应用为此提供了可行性。以上海主城区为例，借助百度地图的海量时空数据，着眼于服务可及性和要素建成情况，引入可达性格局分析、等时圈分析和基于POI分类的统计分析，从服务范围、服务时效和服务能力3个维度定量考察多中心空间发展特征，探索了多中心城市空间发展评估的新方法。实证结果印证了该方法较旧有基于经济、人口等视角的评估既有延续性又更为丰富、直观，也为特大城市以及城市连绵区的可持续空间发展研究提供了有益思路。
Abstract: Polycentric is a major spatial strategy for cities of developed countries to deal with negative externalities resulted from single center agglomeration. As more and more Chinese cities attempt to follow the polycentric spatial pattern, it is pressing to find out ways to grasp those urban spatial evolution characteristics dynamically. Thus, the application of big data on the Internet provides probability for this demand. Taking the main urban area of Shanghai as an example and obtaining massive time-space data from the Baidu Webmap,this paper adopts accessibility spatial-temporal analysis and statistical analysis based on POIs to quantitatively observe current features of polycentric urban area in three aspects as urban-server area, efficiency and capability, which established a new framework for urban spatial development assessment. The empirical results show that the method this paper presented is more abundant and observable than general researches based on economy or population angles. Thereby, this exploration offers further thoughts for the sustainable spatial development of metropolises and megalopolises.
关键词：多中心城市、空间发展 、Webmap 、 动态评估、 上海
Keyword: Polycentric city， Spatial development，Webmap，Dynamic evaluation ，Shanghai
中图分类号：TU981
文献标识码: A
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