基于GIS和模糊SOFM模型的省级尺度土地类型划分研究——以河南省为例

Land-Type Classification at Provincial Level Based on GIS and Fuzzy SOFM Model:A Case Study of Henan Province

研究目的:延续且深入国内分级尺度土地类型研究,在研究思路和研究方法上为新时期土地类型划分研究提供借鉴。研究方法:基于主控因素、相对稳定因素及动态因素的研究思路,采用三级分类层次,构建省级尺度土地类型划分指标体系,运用模糊SOFM模型和GIS技术,以河南省为实证案例进行土地类型划分。研究结果:(1)可将河南省划分为39个土地类,3333个土地型,4015个土地组,类型结果能反映河南省地域分异规律;(2)分类结果与传统图层叠置法划分结果在空间上存在较高一致性。研究结论:基于GIS和模糊SOFM模型对省级尺度土地类型划分具有有效性。

The purposes of this study are to continue and in-depth probe the domestic land-type classification research,and to provide reference for the research of land-type classification in the new period in terms of research ideas and methods.The research methods are as follows.Based on the research ideas of main controlling factors,relative stable factors and dynamic factors,a three-level classification level is adopted to construct the index system of land-type classification at provincial level.By using Fuzzy-SOFM model and GIS technology,Henan is taken as an empirical case to classify land types.The results show that:1)the land types in Henan are divided into 39 first-class types,3333 second-level types and 4015 third-level types,which can reflect the regional differentiation law of Henan;2)the classification results are consistent with those of the traditional graph overlay method.In conclusion,the method based on GIS and Fuzzy-SOFM model is effective for land-type classification at provincial level.