The construction of urban greenways has a significant effect on the improvement of urban high-den-sity environment and the quality of life of residents.Currently,urban street greenways are mostly planned based on the spatial relationship between the roads and the residential areas/public green spaces,lacking systematic consid-eration of multi-dimensional factors such as spatial quality of streets and residents'perception.From the perspective of urban perception,herein,we utilized streetscape image segmentation,spatial analysis and other methods to ex-tract residents'multi-dimensional perception features of roads as well as features of the spatial relationship between the roads and the public service facilities.By comprehensively considering these features,this study constructed an evaluation index system for the potential of greenways along streets and proposed an alignment method of along-street greenways in the urban area.The main urban area of Changsha city was used as an empirical case,and the results showed as follows.1)Changsha city's greenway potential exhibited high-value agglomeration in the urban fringe areas and low-value agglomeration characteristics in the core areas.2)Combining the greenway potential and connectivity,we extracted 19 new greenways and constructed a city-community two-level continuous urban along-street greenway network system to improve the fairness of the existing greenways and urban ecosystem service capacity.
关键词
城市沿街绿道/绿道选线/街景图像/人群感知/长沙市主城区
Key words
urban street greenway/greenway alignment/streetscape image/human perception/the main ur-ban area of Changsha city
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