Research On Spatial Accessibility Analysis Of Country Parks In Shanghai Based On2SFCA

With the significant growth of residents’travel capabilities and a sharp decline of ecological land space in Shanghai, the Country Park has become an important public policy to meet people’s recreation needs and ecological needs of urban development. To ensure public property of country park, not only laws and regulations should be promulgated by the People’s Government, but fairness of site selection should be restrained by planning and design. Space accessibility is the best embodiment of fairness and equality of country park service. Study on accessibility of country parks can provide decision support for the government to seek a reasonable space layout. It has important significance to plan country park site of other domestic cities, determine service vacancy area, adjust the urban and rural population distribution, protect the residents’ recreation demand and play the parks’service function more effectively.Through consulting relevant documents and information, this paper uses geographic information system (GIS) technology, geo-politic database and he Sixth Population Census data, to make a summarization and further discussion of research methods and theories of country park accessibility. Buffer analysis method and network analysis method are used to confirm service area of Country Park. Based on2SFCA, Euclidean distance and travel time, as measurable indicators, are used to analyze accessibility of Country Park. Comparing accessibility by different threshold range and measurable indicators, this paper evaluates spatial distribution fairness of Shanghai country parks through sensitivity analysis, and then concludes that:(1) There is no obvious regularity of country park spatial layout in Shanghai, nor is it expected to form the core city as the center of a single-center structure. The spatial distribution imbalances obviously, the fairness is poor.(2) By the measure of Euclidean distance, to40km as a border, all the Shanghai residents can enjoy country park service, but more than60%of the districts (towns) have poor accessibility. By the measure of traffic network distance, to40km as a border, there is still some area located outside the service area range. By the measure of travel distance, more than75percent of the districts (towns) have poor accessibility, showing relatively bad accessibility as a whole. Under each threshold range, accessibility index has large spans, the maximum value is dozens of times larger than the minimum value, only less than30percent of districts (towns) reach median value, indicating that the fairness of spatial distribution of the study area is poor.(3) Comparing results by the measure of Euclidean distance and travel time, the former calculates and operates more simply and conveniently, but the latter has more rigorous logic, and the findings are more consistent with the actual situation of Shanghai Country Park space accessibility.(4) Based on the above analysis, it is recommended not only to increase in number of Shanghai Country Park, but also insist on reducing the difficulty and unfairness of public service delivery through rural land remediation, adjusting urban and rural population distribution. In this paper, the research methods and evaluation system are still evolving. It is expected to make further discussion on the basis of more information and field surveys in future study.