基于高斯2SFCA的武汉市不同功能城市公园空间可达性研究

Research on Spatial Accessibility of Wuhan City Parks with Different Functions Based on Ga2SFCA

不同类型的城市公园具有各异的功能和作用,不同功能的城市公园的空间布局和可达性将直接影响城市居民的健康和城市生态格局。基于GIS的高斯两步移动搜索法(Ga2SFCA),以武汉市主城区的街道为研究单元,对不同功能城市公园空间布局和可达性进行分析和评价,得出结论:(1)主城区城市公园整体空间分布极不均衡。(2)整体可达性指数从两江四岸轴线范围向外逐渐降低呈现梯级分布;不同功能城市公园可达性指数呈现不同的多中心分布特征。(3)对比二手房和租房市场的高房价中心与整体城市公园服务范围的分布特征趋于一致。(4)观赏型城市公园可达性指数均值最高,且中心城区随阈值范围变化较为敏感。

Different types of urban parks have different functions.The spatial layout and accessibility of urban parks with different functions will directly affect the health of urban residents and the urban ecological pattern.Ga2SFCA based on GIS,taking streets in the main urban area of Wuhan as the research unit,analyzes and evaluates the spatial layout and accessibility of urban parks with different functions,and draws the following conclusions:1)The overall spatial distribution of urban parks in the main urban area is unbalanced.2)The overall accessibility index gradually decreases outward from the axis range of the two rivers and four banks,presenting a cascade distribution;the accessibility indexes of urban parks with different functions show different multi-center distribution characteristics.3)Comparing the distribution characteristics of the high housing price centers in the second-hand and rental housing markets and the overall urban park service scope tend to be consistent.4)The average accessibility index of ornamental urban parks is the highest,and the central urban area is sensitive to changes with the threshold range.