Analysis Of The Skyline Of Cities On Both Sides Of The Huangpu River In Shanghai Based On Fractal Theory

The city skyline is an important element of urban landscapes,reflecting the character and distinctive features of a city.Scientific urban spatial planning,quantitative evaluation standards,and precise indicator data have become key aspects of urban landscape planning and development,including the quantitative analysis of city skylines.This study focuses on providing accurate quantitative data while considering the visual perception of the public.Taking the city skylines on both sides of the Huangpu River in Shanghai as an example,fractal dimension analysis and scenic degree evaluation are applied to five selected observation sections for quantitative assessment.Data analysis is conducted using software such as Excel,MATLAB,and SPSS 26.0,leading to the following conclusions:(1)Fractal analysis of the landscape quality of the city skylines on both sides of the Huangpu River in Shanghai.The better the quality of the city skyline,characterized by a varied and well-balanced composition,and a clear undulating profile,the higher the fractal dimension of the skyline.For instance,the study indicates that the fractal dimensions of the skyline in historic blocks with an elegant and quaint character mostly fall between 1.210 and 1.250.The fractal dimensions of residential buildings in cozy and livable areas are around 1.250.Developed high-tech urban building clusters have fractal dimensions greater than 1.270,while the fractal dimensions of commercial centers with a thriving atmosphere are just above 1.250.(2)Fractal dimension analysis at different scales of the city skylines on both sides of the Huangpu River in Shanghai.According to the results of fractal dimension analysis,in the macro-scale analysis of city skylines,the building facade profile has a significant influence on the composition of the skyline,resulting in higher fractal dimensions.In the meso-scale analysis of city skylines,the distant skyline has the highest fractal dimension.In the micro-scale analysis of city skylines,the fractal dimensions of segmented skylines are generally lower compared to the fractal dimensions of the overall skyline.(3)Evaluation of scenic degrees of the city skylines on both sides of the Huangpu River in Shanghai using the scenic degree evaluation method.In the macro-scale analysis of city skylines,Observation Section E has the highest overall standard value,while Observation Section A has the lowest.In the meso-scale analysis of city skylines,the overall standard value of distant skylines is generally the highest.In the micro-scale analysis of city skylines,the standard values of segmented skylines vary significantly,with Observation Section E having the highest standard value.(4)Construction of a scenic degree model for the city skylines on both sides of the Huangpu River in Shanghai.Through expert selection,10 evaluation factors are chosen for linear regression analysis,resulting in the identification of six influential factors:verticality of buildings,hierarchical sense of buildings,density of buildings,recognizability of buildings,complexity of building profiles,and overall harmony.(5)Recommendations for optimizing the city skylines on both sides of the Huangpu River in Shanghai.Based on the results of fractal dimension quantification analysis and scenic degree evaluation,design principles such as aesthetic principles,holistic principles,rhythmic principles,hierarchical principles,and recognizability principles are summarized.The strengths and weaknesses of the observed city skylines on both sides of the Huangpu River in Shanghai are analyzed,and targeted control suggestions are proposed for optimizing them.