Spatial distribution and accessibility analysis of park green space in Huai'an City
Using the data of park interest points published by AmAP,the online images provided by NGCC and the 7th pop-ulation census data of Huai'an City,the distribution and change trend of green space in Huai'an City were studied by means of average nearest neighbor index,standard deviation ellipse analysis method,geographical concentration index and grid-based Gauss two-step mobile search method,and an evaluation of accessibility was made.Based on the greenbelt area of the study area extracted through satellite image interpretation,it was found that the greenland of Huai'an City was dominated by small dotted ones in quantity,but by large dotted greenbelts in area.Green space was clustered in the study area.The dis-tribution of green space in each district was unbalanced and showed the characteristics of concentration.The accessibility was centered on the green space of the park and had obvious"circle type"distribution characteristics.The high value area appeared in the middle area,i.e.the main urban area,and the accessibility range was 0-1 303.56,still at a high level.To sum up,the distribution of green space in Huai'an City shows obvious of characteristics aggregation,unbalance and high ac-cessibility.
Green space accessibilityAverage nearest neighbor indexGeographical concentration indexGriddingGauss Two-step mobile search methodHuai'an City
NETL
NSTL
万方数据
