结合城市空间的区域异质性特征,提出了顾及障碍空间距离和区域差异的CA城市扩展模型。以武汉市中心城区为例,在精确度量障碍空间的基础上,根据城市用地的不同形态和作用方式进行元胞空间的区域划分,构建动态的演化规则。实证表明,新模型能比较真实地模拟城市的扩展过程,结果可靠。 Combining with the regional heterogeneity of urban space, this paper proposes a CA urban expansion model that takes into account the spatial distance and regional differences of obstacles. Taking the central urban area of ​​Wuhan as an example, on the basis of accurately measuring the obstacle space, the spatial division of the cellular space can be divided according to the different forms and functions of urban land use, and a dynamic evolution rule can be constructed. The empirical results show that the new model can simulate the urban expansion process more reliably and the result is reliable.