Identification And Analysis Of "Production-Living-Ecological" Space (PLES) In Jiaodong Urban Agglomeration Based On Multi-source Spatial Data

With the continuous development of urbanization,urban agglomerations have become the main part of national new urbanization.The report of the 18 th National Congress of the Communist Party of China put forward the development of "Production-Living-Ecological" space(PLES)of "intensive and efficient production space,moderate living space,and beautiful ecological space".Therefor,it is increasingly important to deal with the rationality and structure of the development and utilization of land space,form the planning goal of reasonable layout of production space,living space and ecological space,continue to promote the process of urbanization,and form a land space layout with intensive production,livable life and beautiful ecology.As the economic circle with the strongest economic vitality,the highest development level and the greatest potential in Shandong Province,the identification of PLES and the analysis of spatiotemporal evolution characteristics in the Jiaodong urban agglomeration can provide a scientific basis for the sustainable development of the urban agglomeration.From the perspective of PLES,this thesis takes Jiaodong urban agglomeration as the research area to identify and analyze the spatio-temporal evolution of PLES in the research area in 2012,2017 and 2022,so as to provide scientific support for coordinating the development of Jiaodong urban agglomeration.The specific research content and results are as follows:(1)Division of built-up and non-built-up areas.Using Densi-Graph method,POI data was used to identify the built-up area boundary to divide the built-up area and nonbuilt-up area in Jiaodong urban agglomeration.(2)Function identification of PLES in Jiaodong urban agglomeration.First,in the built-up area,the identification units based on OSM network data are divided.Second,the functional system of PLES is constructed.Third,from the perspective of PLES,the built-up area is divided into three functional spaces,ten identification types and sixteen combination modes.Finally,a new method based on frequency density and type ratio is proposed to identify the built-up area by dividing units.Based on land use classification data of remote sensing images and pixels as identification units,the classification system of PLES in non-built-up areas and empty value areas without POI data points in the identification units of built-up areas was established,and the nonbuilt-up areas were divided into production-ecological space,living-production space and ecological space.(3)Spatio-temporal pattern analysis of PLES in Jiaodong urban agglomeration.Based on the identification results of PLES in built-up and non-built-up areas,the thesis analyzes the spatial and temporal pattern of PLES from the perspectives of its current layout,quantitative structure change,spatial type transfer and driving factors.The concrete results show that: in the built area,the living space and production space are mainly distributed,and the mixed function space containing three kinds of “productionliving-ecological” functions is less.During the study period,the area of single function space shows a decreasing trend,while the area of double function and mixed function space shows an increasing trend.In the un-built-up area,the area of productionecological space is the largest,followed by the area of living-production,and the area of ecological space is the smallest.During the study period,the area of productionecological space is slightly reduced,while the area of living-production space continues to increase.In the aspect of spatial dynamic attitude,the change in the later period is higher than that in the earlier period,and the change in the area of territorial space utilization inside the urban built-up area is obviously larger than that in the non-builtup area,and the change is more drastic.The mixed functional space inside the built-up area changes more dramatically than the single functional space and the double functional space,and the ecological space area inside the non-built-up area changes greatly.In terms of center of gravity migration,the center of gravity of all kinds of PLES has shifted,and the center of gravity of ecological space has shifted the farthest.The research results of driving factors show that economic factors are the main factors affecting the evolution of the pattern of PLES in the study area,among which GDP has the most prominent influence on the pattern evolution.Among the natural factors,air temperature and precipitation also have a certain influence on the evolution of the pattern of PLES.The factors and their interactions have different explanatory powers to the evolution of the pattern of PLES in different periods.This thesis has17 pictures,24 tables,and 89 references.