摘要
城市空间扩展受多重因素驱动,传统二维研究难以反映高层建筑塑造的三维格局,故利用建筑体量表征三维空间成为研究热点。以襄阳市中心城区三维建筑数据为基础,选取三维景观指标,运用空间统计(Getis-Ord Gi*、Moran’s I)和结构方程模型(SEM),从多个角度来研究城市三维空间格局时空分异特征。研究表明:(1)三维空间具有显著的政策导向性分异特征,呈东北—西南轴向扩展;(2)老城区受保护政策限制呈现“低矮高密”特征,新城区则表现为“高疏”形态;(3)基于SEM的驱动机制分析表明政策、经济与自然因子对襄阳市三维空间格局的形成具有差异化的驱动效应。研究发现,政策导向、市场力量与自然因素对城市三维空间塑造存在交互增强作用。为此,亟需构建“政策刚性约束-市场弹性响应-自然本底调节”三元驱动模型,为国土空间立体开发提供决策支持。
While urban spatial expansion is driven by multiple factors,traditional two-dimensional methodologies are insufficient to represent the complex 3D patterns resulting from high-rise building proliferation.Therefore,characterizing 3D space through building volumes has gained prominence as a research focus.Based on 3D building data from the central urban area of Xiangyang City,we employed 3D landscape metrics,spatial statistics(Getis-Ord Gi*,Moran’s I),and structural equation model(SEM)to investigate the spatio-temporal differentiation characteristics of urban 3D spatial patterns from multiple perspectives.The findings reveal that①the 3D spatial structure exhibits significant policy-oriented differentiation,extending predominantly along a northeast-southwest axis.②Protected by restrictive policies,the old urban core manifests a“low-rise but high-density”morphology,while newly developed areas demonstrate“high-rise and sparse”forms.③SEM-based driving mechanism analysis indicates that policy,economic,and natural factors exert differentiated driving effects on the formation of Xiangyang’s 3D spatial pattern.The study further reveals interactive enhancement effects among policy guidance,market forces,and natural factors in shaping the urban 3D space.Therefore,there is an urgent need to construct a ternary driving model of“rigid policy constraints-flexible market responses-natural baseline mediation”,which can provide quantitative decision-making support for 3D development of territorial space.
作者
赵涛涛
王志莉
沈长江
李清娟
ZHAO Taotao;WANG Zhili;SHEN Changjiang;LI Qingjuan(Xiangyang Surveying and Mapping Research Institute,Xiangyang 441003,China)
出处
《地理空间信息》
2025年第12期37-40,共4页
Geospatial Information
