GIS-based the accessibility assessment and spatial layout optimization of parks and green spaces in Guangzhou, China

Parks and green spaces help protect the urban ecological environment and are important places for leisure activities for residents. To get the current spatial layout of parks and green spaces in Guangzhou, the article analyzes their service area under two travel modes. By using the Gaussian-based two-step floating catchment area method (Ga2SFCA), the relationship between the supply capacity of parks and green spaces and the level of neighboring demand under different modes of travel is calculated as a way to assess their accessibility indexes. Combining the results of the analysis, it is expected to propose optimization suggestions for the overall spatial layout of parks and green spaces in Guangzhou, to alleviate the current status quo of unbalanced distribution and to promote the green space resources in Guangzhou are fairly distributed.