Urban Open Space Supply And Demand Feedback Evaluation Based On Danamic And Static Multi-Source Data

The open space system is a good starting point for the city to promote green development and build ecological civilization together.However,the current urban planning system does not have a perfect evaluation and compilation method for the open space system.As urban design plays an increasingly significant role in optimizing and improving the quality of urban space and urban landscape,quantitative analysis and evaluation of open space system at the level of overall urban design is of great significance.The application of new data methods to the quantitative evaluation of urban space is a major trend of planning and development.Firstly,this paper summarizes relevant studies on open space at home and abroad,and finds that there is a development trend that quantitative research with data enhancement gradually replaces traditional interview and investigation research,and multi-angle analysis with economic,social and cultural connection gradually replaces single-angle analysis.Thus,it further summarizes the application of big data in the field of urban planning and the research on open space based on dynamic and static data,and determines to use the combination of multi-source data to evaluate the open space system.Furthermore,this paper gives a deeper and more comprehensive understanding of the open space system.On the one hand,based on existing studies at home and abroad,open space is defined as urban space that is open to the public within the boundary of space growth,with very low or no building coverage ratio,and with leisure and recreation functions,interaction and communication functions between people and society,and between people and nature,and with certain public facilities.The open space is divided into green space,water system and public activities.Meanwhile,the functions and layout patterns of the open space are summarized.On the other hand,starting from the longitudinal view of history,according to the formation process of urban open space at home and abroad and integrating relevant planning thoughts,this paper summarizes the development characteristics of open space at different stages at home and abroad.Found that urban open space at home and abroad have all experienced early ancient period that constructed streets and squares as the main form of open space,and then gradually built more park and green space to enhance the open space.In addition,both domestic and foreign cities have the awareness that the planning and design of open space should tend to fine management,dynamic balance between supply and demand and sustainable development.Based on the cognition above,this paper constructs the evaluation system from the perspective of supply and demand mutual feedbacks of open space.By analyzing the open space case with good correlation between supply and demand,the basic characteristics for a balance open space was summarized.And then put forward five evaluation factors of supply and demand feedback of open space,which includes service coverage accessibility,facility convenience,fairness,crowd activity heat and space use satisfaction.Each factor has a second-level evaluation content.Combined with the evaluation objects and objectives of this paper,it is concluded that the overall open space supply and demand feedback evaluation system is a multi-dimensional study and analysis of the supply-side service capability and demand-side activities of the open space in the two stages of the current inventory and the end of the overall planning.Then in the fourth chapter,this paper summarizes the various data types with high frequency of use today,and divides them into five categories and 26 subcategories according to the characteristics of data content.Considering actual can obtain data types and evaluation factors,this article selects several types data for study which including the geographical spatial data,the open mapping data,the POI data of urban business forms,the Wechat travel data,the Weibo check-in data,the Weibo words data,the spatial data for the master plan,the residential housing price data.Then it introduces the content and application principle of various data,and determines the corresponding software analysis platform and specific mathematical processing methods.The empirical part presents the change of urban development pattern and the evolution of open space in Dangtu county.Then,the status quo and the overall planning end's components of the open space were sorted out,and established an analysis database based on multi-source data.Based on the supply and demand feedback evaluation system,the open space system in Dangtu county is analyzed and studied in multiple dimensions.Finally,this paper even have discussed the equity of open space resource distribution in the light of housing price distribution in residential areas.Finally,this paper summarizes nine characteristics of the overall supply and demand of the open space system in Dangtu county,which includes : overall supply and demand roughly coincide,local matching imbalance,the urban center have obvious shift of gravity;the open space for public activities has a high matching degree of supply and demand;most open space of green space and water system exceeds the demand;the matching degree of supply and demand of open space at community level is generally higher than that at city level;service facilities have obvious influence on crowd activities in open space;new urban areas are easier to achieve supply and demand balance;the supply side itself has deficiencies and contradictions;there is a mismatch between the demand side activity heat and satisfaction;the unbalance between supply and demand of the carrier of urban characteristic intention is not prominent.After an in-depth analysis of the corresponding supply and demand situation of each urban area,the supply and demand problems of open space in each area and optimization suggestions are summarized.Furthermore,seven optimization suggestions for the open space system within the overall urban design scope of Dangtu county are put forward,which includes: supplement corresponding open space elements to promote overall supply and demand balance;improve the open space for public activities,and shape the new vitality zone of the city;implant health care factors and service facilities in open space of green space and water system;pay attention to the construction and promotion of open Spaces at the community level;strengthen the construction and publicity of the image carrier of urban characteristics;building urban characteristic space system based on open space;building open space intelligent management mechanism.At the end of this paper,three research conclusions are proposed based on the research highlights of this paper.Using multi-source data to conduct quantitative research and evaluation of urban space is the general trend of planning development.The attempt of new data analysis method provides more possibilities for studying urban space.Supply and demand feedback evaluation of open space plays a positive role in the cognition and optimization of open space system.