GIS-based Accessibility Analysis Of Park Green Space In The Main Urban Area Of ​​Chengdu

As the only city close to the natural ecosystems of urban green space play an extremely important role in improving the urban ecological environment, providing recreational playground for the residents, maintain public health and other aspects. Public Parks level of service direct response to the extent of taking advantage of people in urban park green space, is the evaluation of the spatial distribution of the value of urban green space important factors. The residents can be more convenient to reach the city park green space, whether it can equally enjoy the green city park bring ecological services is an important indicator of the sustainability of the urban environment, which is equitable access to resources and social equality, which is construction of ecological city and the only way to important principles.Currently, the per capita green area, urban green space rate is the main indicator to measure the level of urban greening, although they can reflect the number of characters of urban green space, but it does not reflect the spatial layout of urban green space and its services, thus Services Evaluation of urban green space prone to bias. Accessibility as a measure of an important criterion of reasonable layout of urban services, including urban green space, including, can compensate for the limitations of traditional evaluation methods and indicators.After Based on the main city of Chengdu Public Parks for data collection, collation and analysis using ArcGIS 10.3 in 3D Analyst tools required for vector data and raster data processed several times. Finally, Spatial Analyst tools Cost distance conducted in parks accessibility modeling work, the resulting main city of Chengdu greenbelt park accessibility map, to work on the preparation of urban green space system planning after the like to provide some data to support decision making and guiding role.