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Delimitating Urban Commercial Central Districts by Combining Kernel Density Estimation and Road Intersections: A Case Study in Nanjing City, China

ISPRS international journal of geo-information, 2019-02, Vol.8 (2), p.93 [Peer Reviewed Journal]

2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;ISSN: 2220-9964 ;EISSN: 2220-9964 ;DOI: 10.3390/ijgi8020093

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  • Title:
    Delimitating Urban Commercial Central Districts by Combining Kernel Density Estimation and Road Intersections: A Case Study in Nanjing City, China
  • Author: Yang, Jing ; Zhu, Jie ; Sun, Yizhong ; Zhao, Jianhua
  • Subjects: Case studies ; Central business districts ; Density ; Electronic maps ; Evaluation ; Heart ; Intersections ; Kernel density estimation ; Kernels ; Land use ; Location based services ; Methods ; Navigation ; Neighborhoods ; POIs ; road intersection ; Roads ; Sustainable development ; Urban areas ; urban commercial central district ; Urban development ; Urban planning ; Urbanization
  • Is Part Of: ISPRS international journal of geo-information, 2019-02, Vol.8 (2), p.93
  • Description: An urban, commercial central district is often regarded as the heart of a city. Therefore, quantitative research on commercial central districts plays an important role when studying the development and evaluation of urban spatial layouts. However, conventional planar kernel density estimation (KDE) and network kernel density estimation (network KDE) do not reflect the fact that the road network density is high in urban, commercial central districts. To solve this problem, this paper proposes a new method (commercial-intersection KDE), which combines road intersections with KDE to identify commercial central districts based on point of interest (POI) data. First, we extracted commercial POIs from Amap (a Chinese commercial, navigation electronic map) based on existing classification standards for urban development land. Second, we calculated the commercial kernel density in the road intersection neighborhoods and used those values as parameters to build a commercial intersection density surface. Finally, we used the three standard deviations method and the commercial center area indicator to differentiate commercial central districts from areas with only commercial intersection density. Testing the method using Nanjing City as a case study, we show that our new method can identify seven municipal, commercial central districts and 26 nonmunicipal, commercial central districts. Furthermore, we compare the results of the traditional planar KDE with those of our commercial-intersection KDE to demonstrate our method’s higher accuracy and practicability for identifying urban commercial central districts and evaluating urban planning.
  • Publisher: Basel: MDPI AG
  • Language: English
  • Identifier: ISSN: 2220-9964
    EISSN: 2220-9964
    DOI: 10.3390/ijgi8020093
  • Source: DOAJ Directory of Open Access Journals
    ROAD
    ProQuest Central
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