Analysis and Research of Urban Street Functions Based on GIS : A Case Study of Xuhui District, Shanghai, China
In the context of the shortage of public space resources in large cities, the concept of "Street Space Renaissance" has been reintroduced, and the social attribute of urban streets as public space have been reemphasized. Street vitality is one of the main indicators to evaluate the social attribute of urban streets, and it is also the main target of urban street design and control in recent years. In this paper, GIS technology is used to evaluate the vitality of streets of different functional types, which makes up for the deficiency of ignoring the functional properties of streets when evaluating the vitality of streets by spatial syntax. This paper takes the Xuhui District of Shanghai, China as an example and comprehensively analyze urban facilities' POI data of different functions (commercial, office, residential and public service facilities, etc.) to identify the density, mixing degree and the dominant nature of the street functions, and using the three indicators to identify the characteristics of urban streets. The research found that: (1) In the area of Xuhui District, according to different types of infrastructures’ POI data, the streets present different functional features. (2) At the overall level, the street vitality shows a certain correlation with the mixing degree and density of the street functions. For example, the streets in the northwest of Xuhui District bordering with Changning and Jing'an District are more active. On the contrary, the vitality of the streets’ in the southern part of Xuhui District and the eastern part near the Huangpu River are generally weak, whose overall development are not perfect. (3) At the meso level of street vitality, the street sections at the intersection are more dynamic than the middle sections. (4) Xuhui District has the highest proportion of streets dominated by the functions of public services and public management, followed by commercial and business streets, and finally residential streets. In general, Xuhui District has strong public functional features and high public service capabilities.
Street function, street vitality, street function density, street function mixing degree, the functional nature of the street, GIS, POI