| Abstract: | Residential green spaces are one of the most frequently used urban green space types. Aiming at filling a gap in the existing greening indicators with considerations on the spatial differences of residential green spaces, as well as to inform the improvement of urban green space service, three greening indicators, i.e. residential unit’s green coverage rate, green view index, and park ratio within a 500 m service radius, are proposed in this paper. This study selects 14,196 residential units in built area of Shenzhen City in 2017 to measure the greening rate and the geographic spatial factors of the units upon multi-sourced geographic databases such as land cover maps and street view images. The research reveals that: 1) the three indicators can all independently measure the greening rate within or around residential units; 2) the studied residential units are low in residential unit’s green coverage rate and park ratio within a 500 m service radius, but high in green view index; 3) there are significant disparities of the greening rate and the surrounding parks in 500 m service radius among the studied units, and among different housing property rights, showing a disequilibrium in green space service; and 4) the greening rate of residential units is mainly impacted by factors such as development intensity, types of housing property right, altitude, and location. In conclusion, it is suggested that urban green space layout should prioritize improving the spatial distribution and layout of residential green spaces, especially for the socially vulnerable population. Finally, the study points out that the park ratio within a 500 m service radius can be adopted as a supplement to existing greening indicators for residential areas. |
