基于SEM和GIS的人居环境自然适宜性评价的一种方法

针对传统人居环境自然适宜性评价模型大多围绕人居环境的宏观影响指标进行研究,只能处理单个因变量、不允许自变量和因变量含有测量误差、不能同时顾及因子间结构和因子间关系、权重确定受主观因素影响较大等弊端,提出了将结构方程模型引入人居环境自然适宜性评价模型的研究思路,定量研究评价模型中各影响因子的权重,以及各影响因子之间的相互影响、制约作用,同时将评价模型与GIS进行有效结合,可将评价过程与结果进行可视化表达,为相关研究提供参考。

A New Evaluation Methodology of the Natural Suitability for Human Settlements Based on SEM and GIS

In view of the defects in the traditional evaluation models of natural suitability for human settlements,forexampe,the models mostly focus on the macro impact factors on human settlements,they can only deal with single variable,and cannot tolerate any measurement errors of both the dependent and independent variables,they also cannot take into account the structure and relations among factors at the same time,the index weight is seriously affected by the subjective factors,etc.The paper proposed to introduce the structural equation to the evaluation model of natural suitability for human settlements,quantitatively studied the weight of each influential factor in the evaluation model as well as the interaction among various factors,then combined the evaluation model with GIS to visualize the evaluation process and results,which provided references for relevant studies.