The Research Of Urban Park Green Space Pattern In Beijing Shijingshan District Based On Accessibility

Urban park green space is the most closely linked with the public life in the urban green space system,as an important natural landscape element of the city,it is the most effective ecological and social functions.In recent years,the process of urban development is getting faster and faster,people who are under the cover of reinforced concrete are eager to see a little green in the gray city,all over the city is also to increase the construction of park green space.But the blind construction has only increased the cost of investment.It is hard to know the urban park green space is really effective to be used by visitors,only depend on the urban greening rate,per capita green space and other traditional indicators.We need to use a more scientific way to evaluate the construction of green space.Accessibility of urban parks green space is an important indicator of whether the natural service provided by urban park green space can be conveniently and fairly enjoyed by the public.Its essence is from any point in the urban space to reach the convenience of the park green spaces.There are many ways to study the accessibility of urban park green space.Network analyst method is based on the ArcGIS platform,and used the city green space and entrances of residential area as the centers and the city actual road network as the skeleton.It can ignore the size,shape and other variables of the city park green space.For the purpose of finding the true arrival of park entrance,seeking the best resources and the shortest path,and calculating the city park green space service ability.The analysis result is objective and accurate,and suitable for studying the accessibility of public parks in Beijing Shijingshan District.According to the network analysis method,there are 12 park green spaces have good accessibility in Bajiao Street,Laoshan Street,Babaoshan Street,and Lugu Street.And there are 11 park green spaces have poor accessibility in Gucheng Street,Jinding Street,Pingguoyuan Street,Guangning Street,and Wulituo Street.In order to make the research more accurate and to obtain the true feelings of park green space from the users,we have conducted a field research and issued a questionnaire though 23 park green space in Shijingshan district.Using the semantic differential method to quantitative the evaluation results from the part of questionnaire.Then,combining road&traffic,endpoint attraction and population distribution to determine the accessibility of park green space in Shijingshan district.It comes to conclusion of urban park green space accessibility by only uses Network Analyst method.It provides a new idea for the study of the accessibility of urban park green space.Analysis the park green space accessibility of Shijingshan district and the problems of green space pattern in current situation,and put forward three suggestions on how to optimizing the current green space pattern of Shijingshan district.