Study on measurement of community life circle and optimization of public service facilities in old city:Taking Yibin City as an example
In the second half of China's urbanization,people-oriented,stock planning,and intensive development have become the main themes of the city nowadays.The community life circle in the old city,which carries the memory of the city,is in urgent need of renewal and optimization.This study takes the Yibin old city cluster as an example.Using methods such as the Interlocking Network Model and the facilities accessibility analysis based on the real road network,combined with the POI data of 10 major types of public service facilities and data on the importance evaluation of the facilities by residents,it explores the measurement of 10-minute community life circle in the study area.Based on the measurement results,the optimization and site selection of corresponding public service facilities are proposed from the perspective of the life circle.The paper first explains the reasons why Yibin old city cluster is chosen as the study area and why the 10-minute community life circle is taken as the measurement scale of the study.According to the previous literature research experience,the grid of 250 m*250 m is selected as the basic unit for dividing the life circle.The data sources for this study mainly include the vector data of buildings and roads captured by Python on the Baidu and AMAP map platform,and the questionnaire data surveyed and collated in the field investigation,which can be used to judge the impact of various facilities on residents.Based on the Interlocking Network Model and the current domestic 10-minute life circle scale control documents,the above data are used to determine the closeness of the relationship between the grids in the study area and to delineate the scope of the community life circle.As a result,Yibin old city cluster is divided into 4 life circles:central life circle,sub-central life circle,transition area life circle,and edge life circle,with the accuracy of the division results verified.According to the current situation of each life circle,suggestions on the optimization and location selection of corresponding public service facilities are put forward,and the living convenience evaluation of each life circle is carried out to represent the construction level of various public service facilities in terms of quantity,type,and accessibility.After that,the method of calculating the centrality index is used to clarify the importance degree of each block in the life circle,and the optimization suggestion is put forward for the location selection of the 10-minute life circle level public service facilities.The results show that:1)Yibin old city cluster can be divided into 4 10-minute community life circles,with an average land scale smaller than that of the plain,provincial capital,and super large city.2)The 4 life circles as a whole have a common problem of insufficient quantity and limited coverage of facilities such as parks,squares,social welfare,science,education,and culture facilities.3)There are significant differences in the convenience of life among different life circles,and the development is uneven.It is advisable to focus on optimizing the facilities that are lacking in transitional areas and peripheral life circles in the future.4)Based on the coverage of facilities and the accessibility of residents,each life circle should provide the top three centrality points as recommended setting points for 10-minute level facilities.Besides,the results indicate that the Interlocking Network Model has good performance at the meso and micro scales in exploring land correlations and guiding the measurement of community life circles.The core of the model is to quantify the correlation degree of actors within the network.In terms of life circle measurement,it is shown to quantify the correlation of different groups to the use frequency,preference,accessibility,and other elements of the facilities in different blocks,and then further identify the group of land parcels with relatively close connections.This is in line with the nature of the relationship between life circles,which is mutually independent but nested.
10-minute community life circlelife circle measurement:Interlocking Network Modelpublic service facilities configuration
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