The Accessibility Analysis Of Parks In Jinan City Based On Public Transport

After four decades of reform and opening up,the material life of the people has been gradually satisfied,and the demand of urban residents for the improvement of spiritual life quality has become more and more urgent,and the willingness to engage in outdoor exercise and leisure activities has also become more and more strong.Urban parks provide space for recreation,communication and fitness among urban residents,and alleviate the ecological problems arising from the rapid urbanization.The development of urban public transport is an important way to alleviate urban traffic congestion and promote the healthy and green development of urban traffic.Therefore,based on public transport,this study explores a new perspective and method to study the accessibility of parks,and conducts application,evaluation and analysis.The main contents of the study are:Firstly,the concepts and research frontiers related to parks and accessibility are fully understood,and all kinds of basic information of parks in jinan city are deeply integrated.On the basis of field research,a list of parks above a certain size is sorted out.Secondly,the entrances and exits of the park should be marked on the spot as the "source" of accessibility analysis.Meanwhile,the collection of population data should be carried out to prepare the foundation for research.Thirdly,through the API provided by autonavi Internet map service,the time distance cost of the park in two modes of bus travel with and without subway is obtained by using Python network programming.Fourth,based on the concept of isochronic line,the isochronic circle of bus accessibility was constructed in GIS,and three parts of analysis were carried out.First,based on the overall accessibility result of subway mode,the overall accessibility was analyzed by combining relevant data of population data set,and the overall spatial distribution characteristics of bus accessibility were obtained.The second is to compare the accessibility of urban park green space service under the two modes of public transport with and without subway,and to evaluate the effect of subway on the accessibility of public transport.Thirdly,the bus accessibility index of a single park is compared one by one,and the parks with weak accessibility ability are selected and analyzed one by one.Through the above analysis,it is found that: first,the overall accessibility of public transport in jinan city park is good.The accessible area within 40 minutes accounts for about72% of the total study area,but the optimal area ? 20 minutes is small,accounting for less than 2%.The range of accessibility within 20min-30 min and 30min-40 min grew the fastest.The growth trend of accessibility within 40min-50 min and 50min-60 min began to slow down and gradually tended to be stable.40 min was an important time inflection point of the growth trend.The results of accessibility were negatively correlated with the population density distribution,with a good fit.A small part of the area had a large population but poor accessibility.Due to unconnected roads and blank bus network,the overall result is an "enclave".The accessibility results were negatively correlated with the population density distribution,and the fit was good.In a small number of areas,the population was large but the accessibility was poor.Second,due to the limited opening lines of rail transit at present,the overall accessibility results of the two bus travel modes have little difference,but it can still be seen that the accessibility capacity of parks around the line has been improved after the subway is added.Third,the public transport accessibility of the park is poor mainly due to unreasonable entrance and exit Settings,low degree of openness,imperfect external area road network,small number of surrounding bus routes and inconvenient transfer.Meanwhile,the road network in the outside area is not perfect and the number of bus lines around it is small,which makes the accessibility of public transport poor.Finally,this study puts forward Suggestions and reflections from the perspective of planning and management on the existing problems of bus accessibility in jinan city park,so as to provide strong support for future related planning and provide reference for management departments to carry out regular optimization and transformation of urban park green space.