Measurement of mixed use of spatial functions in urban built-up areas and analysis of multi-scale influencing factors:A case of Hohhot
In response to issue such as the constricted supply of urban land and the low degree of spatial intensification,a vital approach to improve land resource utilization efficiency is to effectively enhance the mixed utilization of urban spatial functions.This study focuses on the central urban area of Hohhot as the research subject,uses point-of-interest(POI)data to evaluate urban spatial functions,and the"quadtree"concept to construct an evaluation grid,and analyzes the distribution characteristics of urban spatial functions.By calculating the spatial information entropy index and constructing a hierarchical linear model,the degree of mixed utilization of urban spatial functions and influencing factors are measured.The results demonstrate that:1)The urban space utilization in Hohhot is relatively single,the scale is small and the systematicity of leisure green spaces is insufficient.The synergy between residential living and commercial business functions is relatively weak,revealing a certain degree of spatial segregation between workplace and residence.2)The level of mixed utilization of urban spatial functions is relatively low,and the information entropy index shows a decreasing distribution feature from the center to the surrounding area,characterized by a distinct edge effect.Highly mixed-use areas are mainly located around major roads and commercial areas of the city.3)Enhancing economic vitality,improving the accessibility of public services,and strengthening transportation infrastructure can enhance the degree of urban space mixed-use,increasing the green space ratio can weaken the degree of mixed utilization of urban space.The capacity of block buildings and the population carrying capacity of blocks respectively strengthen and weaken the positive relationship between economic vitality and the degree of mixed-use of urban space.By adopting the research paradigm of"function-pattern-process",this study dissects the distribution characteristics and multi-scale factors that influence the degree of mixed-use of urban spaces,offers scientific insights into how the regulatory indicators can be utilized to adjust the degree of spatial function mixing and enhance land utilization efficiency in spatial planning practices.
urban built-up areasspatial functionmuti-source datahierarchical linear modelHohhot
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