摘要
提升城市品质、塑造活力空间是城市高质量发展的重要议题.基于夜间灯光数据、POI数据、路网数据及建筑矢量数据等多源空间大数据,综合运用熵值法、空间自相关分析、FD-CR模型和最优参数地理探测器模型等方法,探析兰州新区城市活力的空间格局及影响因素.结果表明:1)兰州新区城市活力不足且空间分布不均衡,整体呈现由中心向外围圈层递减的特点.2)综合活力具有显著的正向空间集聚性.核心地区以"高-高"集聚为主,外围地区以"低-低"集聚为主.3)不同功能区综合活力具有空间异质性.热点区集中于新区中部,呈现"中密周疏"的特点;冷点区总体呈现"北多南少、北聚南散"的分布特征.4)城市活力并非由单因素主导,而是多种影响因素综合作用的结果.交通可达性、城市功能和地理区位对城市活力影响显著.自然条件和环境质量不直接作用于城市活力,而是通过耦合其他因素间接影响其空间分异.
Abstract
Upgrading urban quality and creating vibrant space are important issues for high-quality urban development.Based on multi-source spatial data such as nighttime lighting data,point of interest data,road network data and building data,the spatial pattern of urban vitality in Lanzhou New District was explored and its influencing factors were analyzed by using entropy value method,spatial autocorrelation analysis,FD-CR model and optimal parameters-based geographical detector model,etc.The results show that:1)The urban vitality of Lanzhou New District is insufficient and unevenly distributed in space,overall showing the characteristics of decreasing from the center to the peripheral circles.2)The comprehensive vitality in Lanzhou New District shows a significantly positive spatial agglomeration,with"high-high"agglomerationin core areas and"low-low"agglomeration in peripheral areas.3)The comprehensive vitality of different urban functional areas is spatially heterogeneous.Hot spots are concentrated in the middle of the new district,showing the characteristic of"dense in the middle and sparse around",cold spots generally show the distribution characteristics of"more in the north,less in the south,clustered in the north and dispersed in the south".4)Urban vitality is not dominated by a single factor,but is the result of a combination of more factors.Traffic accessibility,urban function and geographical location significantly impact on urban vitality.Natural conditions and environmental quality do not directly affect urban vitality,but indirectly affect its spatial differentiation through coupling with other factors.
国家科技期刊平台
NSTL
万方数据