Urban Green Space Accessibility Evaluation Using Age-Based 2-Step Floating Catchment Area Method

People of different ages are not tolerant to the same distance. Existing green space accessibility researches are often based on distance measurement, and less consideration is given to differences between different groups of people. We proposed a revised Gaussian 2-Step Floating Catchment Area Method (G2SFCAM) with age information considered to evaluate the spatial accessibility to urban green space at an administrative grid level. Precise population data of residential building scale and actual road network were used for a detailed evaluation. This Age-based 2SFCAM Model was tested in Yichang, China. Both results derived using G2SFCAM and Age-based 2SFCAM were compared. Results indicate that the proposed Age-based 2SFCAM method shows a more realistic estimation and reflects spatial differentiation of green space accessibility. This research helps balancing the rights of people of all ages to access the urban green spaces, and thus promotes health equality and environmental justice in urban planning and management.