39 Boundaries and blocks in redefined cities of China 2011 & 2016
(https://www.beijingcitylab.com/data-released-1/)
數(shù)據(jù)介紹
The dataset 'Redefined Cities' depicts the redefined central regions of natural cities across China using emerging spatial big data. The dataset includes four shapefile data: redefined cities in 2011 and 2016, and corresponding blocks within cities. The redefined cities and blocks are computed with the method of redefining cities (Song, Y. et al. 2018) and points of interest (POIs) data.
利用新興的大規(guī)模地理空間大數(shù)據(jù)，我們對中國城市系統(tǒng)從實體地域角度進(jìn)行了全面的重新定義，本數(shù)據(jù)集對這一成果進(jìn)行了共享：包括四個shapefile數(shù)據(jù)：2011年和2016年重新定義的城市邊界，以及重新定義城市內(nèi)部相應(yīng)的地塊構(gòu)成。
The brief descriptions and attributes of four shapefile data are listed below.
下面列出了四個shapefile數(shù)據(jù)的簡要描述和屬性：
(1) Redefined cities in 2011
The data consists of 2005 redefined cities with the total area of 0.167 million square kilometres. Five attributes are available for the data, including ID of redefined cities (CityID), area (Areakm2), POI density (PoiDens), density of road junctions (JuncDens) and population density (PopDens).
(1) 2011年重新定義城市
數(shù)據(jù)包括2005個重新定義的城市，總面積為0.167萬平方公里。數(shù)據(jù)有五個屬性，包括重新定義的城市ID (CityID)、面積(Areakm2)、POI密度(PoiDens)、道路交叉口密度(juncden)和人口密度(PopDens)
(2) Blocks of redefined cities in 2011
The data consists of 78 thousand blocks within the 2005 redefined cities. It includes two attributes: the corresponding ID of redefined cities (CityID) and areas of blocks (Areakm2).
2) 2011年重新定義的城市街區(qū)
這些數(shù)據(jù)由2005個重新定義的城市中的7.8萬個地塊組成。它包含兩個屬性:重新定義的城市的對應(yīng)ID (CityID)和塊的面積(Areakm2)
(3) Redefined cities in 2016
The data consists of 4678 redefined cities with the total area of 0.726 million square kilometres. Three attributes are available for the data, including ID of redefined cities (CityID), area (Areakm2) and POI density (PoiDens).
(3) 2016年重新定義城市
數(shù)據(jù)包括4678個重新界定的城市，總面積為0.726萬平方公里。數(shù)據(jù)有三個屬性，包括重新定義的城市ID (CityID)、面積(Areakm2)和POI密度(PoiDens)
(4) Blocks of redefined cities in 2016
The data consists of 187 thousand blocks within the 4678 redefined cities. It includes two attributes: the corresponding ID of redefined cities (CityID) and areas of blocks (Aream2).
(4) 2016年重新定義的城市街區(qū)
數(shù)據(jù)由4678個重新定義的城市中的18.7萬個地塊組成。它包含兩個屬性:重新定義的城市的對應(yīng)ID (CityID)和塊的面積(Aream2)
Note that the comparison between redefined cities in 2011 and 2016 may not be exactly comparative due to different sources and collection methods of POI datasets in the two years.
We recommend you cite the following publication as a reference of the data and a courtesy for using the data (attached below as well):
Song, Yongze, Ying Long, Peng Wu, and Xiangyu Wang. 'Are all cities with similar urban form or not? Redefining cities with ubiquitous points of interest and evaluating them with indicators at city and block levels in China.' International Journal of Geographical Information Science 32, no. 12 (2018): 2447-2476. Doi: 10.1080/13658816.2018.1511793
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數(shù)據(jù)背景了解：對應(yīng)的論文摘要
城市形態(tài)反映了城市的空間結(jié)構(gòu), 在中國, 城市的空間結(jié)構(gòu)發(fā)生了劇烈的變化。由于類似的城市規(guī)劃習(xí)慣和策略, 快速城市化可能導(dǎo)致類似的城市形式。然而, 中國的城市形態(tài)是相同的還是顯著的不同, 目前還沒有進(jìn)行實證研究。Yongze Song, Ying Long, Peng Wu, Xiangyu Wang 以城市和街區(qū)這兩個空間單位為基礎(chǔ), 對中國城市形態(tài)進(jìn)行了研究，將重新定界的城市分為四個層次，以考察不同城市發(fā)展階段對城市形態(tài)的影響。
Are all cities with similar urban form or not?
Redefining cities with ubiquitous points of interest and evaluating them with indicators at city and block levels in China
Yongze Song, Ying Long, Peng Wu, Xiangyu Wang
ABSTRACT：
Urban forms reflect spatial structures of cities, which have been consciously and dramatically changing in China. Fast urbanisation may lead to similar urban forms due to similar habits and strategies of city planning. However, whether urban forms in China are identical or significantly different has not been empirically investigated. In this paper, urban forms are investigated based on two spatial units: city and block. The boundaries of natural cities in terms of the density of human settlements and activities are delineated with the concept of ‘redefined city’ using points of interests (POIs), and blocks are determined by road networks. Urban forms are characterised by city-block two-level spatial morphologies. Further, redefined cities are classified into four hierarchies to examine the effects of different city development stages on urban forms. The spatial morphology is explained by urbanisation variables to understand the effects. Results show that the urban forms are spatially clustered from the perspective of city-block two-level morphologies. Urban forms tend to be similar within the same hierarchies, but significantly varied among different hierarchies, which is closely related to the development stages. Additionally, the spatial dimensional indicators of urbanisation could explain 41% of the spatial morphology of redefined cities.
KEYWORDS：
Urban form
Redefined city
POI density
Spatial morphology
Urbanisation
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