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Spatial relationship between green view index and normalized differential vegetation index within the Sixth Ring Road of Beijing

机译:北京六环路中绿色视角指数与常规鉴别植被指数的空间关系

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摘要

Urban green space (UGS) has been recognized as a critical urban landscape design element. The green view index (GVI), as an indicator to quantify the perception of green landscape from the pedestrians' perspective, has been widely used to evaluate the quality and aesthetic ecosystem services of urban green spaces. Therefore, to quantify the quality and regional differences of urban road greening in the horizontal or vertical dimensions within the Beijing Sixth Ring Road, this study analyzed the spatial pattern of road GVI at different levels, including at sample points, roads, and counties, and evaluated the differences in road GVI in different urban functional zones in 2014. Based on the geographically weighted regression model, this study further analyzed the spatial heterogeneity between road GVI and the normalized difference vegetation index (NDVI). The results showed that the average road GVI at sample point level, road level, and county level within the study area were 17.2 %, 15.3 %, and 15.7 %, respectively, which were overall relatively low. The road GVI between adjacent ring roads from inside to outside showed an obvious regional difference. The ranking of average road GVI in different functional zones was as follows: tourism zone (15.68 %) > residential zone (15.12 %) > service zone (14.70 %) > cultural zone (14.22 %) > commercial zone (12.35 %). Road GVI showed a significant positive correlation with NDVI but spatial heterogeneity existed. Research on the spatial characteristics of urban road greening is helpful for urban planners and managers to plan and design urban road greening more accurately and effectively.
机译:城市绿地(UGS)已被公认为一个重要的城市景观设计元素。绿色景观指数(GVI)作为从行人角度量化绿色景观感知的指标,已被广泛用于评价城市绿地的质量和美学生态系统服务。因此,为了量化北京市六环路内城市道路绿化在水平或垂直维度上的质量和区域差异,本研究分析了不同层面上的道路GVI空间格局,包括采样点、道路和县,并评估了2014年不同城市功能区道路GVI的差异。基于地理加权回归模型,本研究进一步分析了道路GVI和归一化差异植被指数(NDVI)之间的空间异质性。结果表明,研究区域内样本点、道路和县级的平均道路GVI分别为17.2%、15.3%和15.7%,总体相对较低。从内到外,相邻环路之间的道路GVI表现出明显的区域差异。不同功能区的平均道路GVI排名如下:旅游区(15.68%)>住宅区(15.12%)>服务区(14.70%)>文化区(14.22%)>商业区(12.35%)。道路GVI与NDVI呈显著正相关,但存在空间异质性。研究城市道路绿化的空间特征,有助于城市规划者和管理者更准确、更有效地规划和设计城市道路绿化。

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