An Analysis On Service Effectiveness Of Green Space In Community Life Circle Based On The Web Map Data

As a noncompetitive public resource,urban green space which is a key element of urban provides surroundings for residents in community life circle to contact with each other and have outdoor recreation which is a fundamental component of people's daily life.Walking,being considered as a healthy trip mode,is advocated worldwide in recent years.For this reason,facility in life circle,especially green space,is required to allocated appropriately,in order to better conform to the general rule of daily routine in five minutes' life circle.Meanwhile,the codes for green land and green space merely stress attention on per capita index of the whole region or residential district,ignoring the trip characteristics and travel range of residents in life circle.As the arrival of "Internet+" era,open data has entered the field of city research,which provides a new horizon for urban space research efficiency in a refining scale.Therefore,evaluation method of urban space research,combining with web map data,provides theoretical support for the specific plot of optimal design and adjustment of green space in life circle.The study selects the old city area of Ganzhou as the research region,brings in the web map data,uses ArcGIS Space Analysis Toolbox as research tool and Two-Step Floating Catchment Area(2SFCA)and Walk Score as research methods.Firstly,the paper reveals the characteristics of spatial distribution of green space in 5 minutes' life circle,and analyzes the balance of supply and demand by per capita area of green space.Secondly the choice opportunity and walk score are evaluated to describe the current condition of green space.Finally,the insufficient status of green space is put forward to find the specific plot of optimal design and adjustment of green space in life circle in the old city area of Ganzhou.