Accessibility Study Of Parks Based On Space Syntax Theory In Harbin Main Urban Area

With the development of "healthy China" and "livable city",the public's demand for ecological protection,environmental landscape,fitness facilities and other aspects keeps increasing.As the "green window" of the city,the reasonable layout of the park can promote the accessibility of public health service facilities.Demand is an important indicator to evaluate whether the park can meet the needs of citizens.In addition to meeting the basic needs of the number of parks,more and more citizens begin to pay attention to the comfort and convenience of the park in space use.The accessibility of parks can well express the rationality of park layout and the fairness of citizens' use.In view of these,this paper takes 77 urban parks in the main urban area of Harbin as the research object,based on the analysis software of Depthmap and GIS and the theory of space syntax,this paper studies the morphological evolution characteristics of the main urban area of Harbin,divides the areas with high population activity intensity,discusses the accessibility level of the park.The main content is as follows:(1)Traffic and park data in the main urban area of Harbin are classified and sorted.The Harbin urban road network is extracted and convert into a line segment model.The feasibility of the model is verified by the measured traffic flow.The spatial syntactic theory is used to analyze the connection degree,integration degree,synergy degree,spatial efficiency value and other variable indexes of urban parks,so as to obtain the accessibility level of urban parks in the main urban area of Harbin.Among them,the global accessibility expresses the accessibility level of a certain point within the whole city to the urban park.Local accessibility refers to the accessibility level of the park within a certain range around it.Perceived accessibility expresses the correlation between the street network system and the degree of crowd aggregation.Psychological accessibility reflects the attraction and penetration of space before they arrive at the park.(2)POI reflects the spatial distribution and activity intensity of citiz ens.77 in Harbin city park as discrete points generated tyson polygon,approximation for the service area of the park.The POI of various types are superimposed to connect with the service area of each park,and the demand of parks in the main urban area of Harbin is analyzed to obtain the demand of citizens for park green space under different urban Spaces.It is concluded that the areas with high demand and service pressure are mainly in the old urban areas with high integration such as central street,museum,hexi street,hexing road and railway station.(3)Combined with the analysis of the status quo,demand and accessibility of parks in the main urban area of Harbin,it is concluded that urban development and park construction are not synchronized.The distribution of parks is characterized by more south than north and more west than east.The parks of each administrative region have the characteristics of aggregate distribution.The park is built along the river or ditch.There is a mismatch between the park layout and the numerical distribution of accessibility,some areas with high accessibility and dense population lack park construction,and some areas with dense parks have low spatial accessibility.On the whole,the park has a moderate level of perceived accessibility.The park has a low level of perceived accessibility in pingfang district,the west of so ngbei district and the east of hulan district.The scale of the park does not match the psychological accessibility;The accessibility of parks in different administrative regions varies greatly.(4)Some suggestions are put forward for the reasonable layout and optimization of the accessibility of the parks in the main urban area of Harbin,such as improving the attraction and accessibility of the parks themselves;Enhance the spatial accessibility on both sides of the songhua river and along the railway;To improve the planning and construction of interregional network;Implement diversified green measures in different areas to effectively improve the accessibility level of parks.This will further improve the service fairness and spatial accessibility of Harbin park,make the park construction more scientific and reasonable,meet the recreation and fitness needs of different citizens,and promote the realization of the goals of "livable city" and "healthy China".