| Urban space is an important carrier for urban social,economic,cultural,ecological and other factors and activities to maintain normal operation.With the rapid development of urbanization and the continuous improvement of social and economic level,urban space presents a rapid expansion trend.Due to the influence of location,policy,physical geography and other factors,the expansion scale,spatial form and utilization efficiency of urban space show great development differences.At present,the relevant researches on urban space mainly focus on a single city,while the researches on multiple urban Spaces within a region are relatively few.In this context,this thesis studies the characteristics of urban spatial development in Shandong Province from a regional perspective.On the basis of summarizing and analyzing relevant theories and research literature of urban space at home and abroad,this thesis takes 94 cities in Shandong Province as the research object,and uses satellite remote sensing image recognition to extract raster images of urban construction land from 2000 to 2020 as the basic database.This thesis makes an empirical study on the characteristics of urban space development in Shandong Province from three dimensions: scale,form and efficiency of urban space.First,on the basis of the research and evaluation of the development level of the total spatial scale of Shandong Province,from the two dimensions of space and time,using the mean value,standard deviation,natural discontinuities and spatial autocorrelation quantitative analysis methods,to study the overall and various types of urban spatial scale and expansion intensity of Shandong Province.Secondly,according to the logical idea from outside to inside and then to mode,the outer edge shape,inner compactness and shape pattern of urban space were studied by using fractal dimension,compactness and the ratio of the major and minor axes of the outer tangent ellipse,and the spatial morphology evolution characteristics of the whole and various types of cities in Shandong Province were discussed by constructing a time series model.Finally,the single factor input-output efficiency model was used to study the social efficiency and economic efficiency of urban space in Shandong Province,and the super efficiency DEA model was used to analyze the development characteristics of urban spatial comprehensive efficiency in Shandong Province.Through the research,it is found that:1.The urban spatial scale of Shandong Province showed an increasing trend on the whole,and with 2010 as the boundary point,the intensity of urban spatial expansion first increased and then decreased;The spatial scale of different types of cities from high to low formed the ordinal development structure of municipal district-county-level city-county,and its expansion intensity formed the ordinal development structure of county-municipal district-county-level city.However,the ordinal structure of the two cities showed a completely opposite development trend,which was reflected in the increasing number of cities with higher spatial scale,while the number of cities with higher expansion intensity was decreasing.The urban spatial scale of Shandong Province has a significant spatial imbalance.There is a great difference between the urban spatial scale of the municipal district and the surrounding county-level cities and counties,which forms a significant feature of center polarization at the provincial level.The cities with a large spatial scale are concentrated in Jinan,Qingdao and Linyi.2.The outer edge of urban space in Shandong Province presents an increasingly irregular development trend,and the trend of uneven expansion of urban space is increasing significantly due to traffic arteries or physical geography and other factors.The compactness of urban space construction land is increasing on the whole,and the degree of inner agglomeration of urban space is increasing continuously.The development characteristics of the sequence structure of the two cities are similar,that is,the number of cities with a higher degree of irregularity and a higher degree of compactness is increasing significantly on the whole.There are three types of urban spatial patterns in Shandong province: agglomerate,belt and cluster,and the number of belt cities is on the rise,among which Yantai and Jinan are the two cities with the highest degree of irregularity.The spatial distribution of different types of cities has a great correlation with the topographic distribution pattern of Shandong Province.Belt cities are mainly distributed in the hilly areas of south-central Shandong and Jiaodong,forming a "Y-shaped" spatial distribution structure with Jinan,Yantai,Weihai,Qingdao and Zaozhuang as the core.Agglomerate cities are mainly distributed in northwest Shandong plain,southwest Shandong Plain and Jiaolai Plain.Cluster cities are mostly located near the alluvial plains of the Yellow River or other rivers.3.The overall urban spatial comprehensive efficiency of Shandong Province shows a decreasing trend.The development of urban space is not coordinated with the urban social and economic factors,and the difference of spatial efficiency among different cities is increasing.The spatial efficiency of each type of city forms a sequential development structure of municipal district,county-level city and county from large to small,showing the development characteristics of the number of medium-efficiency and high-efficiency cities decreasing while the number of low-efficiency cities increasing.The high-efficiency cities are mainly distributed in the eastern part of Shandong Province with Yantai,Weihai and Qingdao as the core,and in the central part of Shandong Province with Jinan and Zibo as the core.The innovation of this thesis is to make use of satellite remote sensing image data,based on the provincial scale,to study the development characteristics of the scale,form and efficiency of the overall and sub-type urban space in Shandong province,so as to have a more comprehensive and in-depth understanding of the urban spatial development characteristics in Shandong Province.There are two deficiencies in this thesis.On the one hand,the relevant research content of urban space influencing factors needs to be improved,especially the quantitative analysis of factors such as planning policies.At present,there are few indicators that can be collected to support the feasibility of subsequent relevant studies.On the other hand,there is a lack of simulation research on urban space expansion,shape and efficiency development and change under different development scenarios.It is hoped that some deficiencies of this thesis can be improved through further study in the future. |
