基于AHP构建城市生长地理适宜性表面模型研究

Build the Suitability Surface of Urban Growth by AHP

区域城市生长的研究旨在通过数学建模手段,透过复杂的城市现象,揭示城市形成和发展的内部机制,提炼决定城市生长的影响因素,构建区域地理空间格局。以浙江省为例,利用层次分析法构建城市生长层次模型,并计算各地理要素的权重;采用模糊数学方法计算虚拟城市区位各地理要素的邻近性;利用加权和综合方法,将两者加权综合,得到虚拟区位的城市生长适宜性程度;对获得的适宜性数据进行空间插值,构建城市生长适宜性表面,并对其进行相应分析。结果表明,所构建的城市生长地理适宜性表面模型与城市实际分布形态相符,可以满足城市生长研究需要。

The research on the growth of regional cities aims at revealing the internal mechanism of urban growth through the means of mathematical modeling,through the complicated urban phenomena,extracting the influential factors that determine the urban growth,and constructing the regional geography spatial pattern.Taking Zhejiang Province as an example,a hierarchy model of urban growth by using analytic hierarchy process is constructed and the weight of each geographical element is calculated.The fuzzy mathematics method is used to calculate the neighborhood of each geographical element of virtual city location.Using the weighted sum method,Weighted synthesis is to get the degree of urban growth suitability of virtual location.The obtained suitability data is spatially interpolated to construct the urban growth suitability surface,and the corresponding analysis is made.The analysis results show that the constructed surface model of urban growth and geographical suitability is consistent with the actual urban distribution,which can meet the needs of urban growth research.