县级中大比例尺以土地类型划分为基础进行农用地分等的方法论研究——以太原市万柏林区为例

Methodology Study on County Medium-Large-Scale Classification of Agricultural Land Use Method of Land Type Division ——Take the Wanbailin District of Taiyuan City as an Example

农业用地是土地的农用类型。根据FAO关于土地的定义,土地应当是比土壤更为广泛的概念,该文在太原市万柏林区的工作区采用了土地类型系统分类中以中地形为主体的小单元的逐级分级理念,分为土地综合类、土地综合亚类和土地利用综合体三级分类系统,既解决了农用土地分等的理论问题,又解决了过去长期以来,直到现在还在困扰农用土地分等的最低制图与评价单元的实际问题,并利用“面向对象”的土地资源的信息编码技术,将黄土高原边缘地带的太原市万柏林区的土地类型划分为10个土地综合类、42个土地综合亚类和309个土地利用综合体。并在GIS支持下,绘制了该区1﹕3.5万土地类型图。该方法初步建立了利用土地类型概念进行农用土地分等的理论基础及其工作方法。

Based on the definition of land from FAO, land is more far-ranging conception than that of soil, and agricultural land is the part of land used for agricultural area. The agricultural land classification system can be classified into three types, that is land synthesis type(from landform), land synthesis subtype (from soil) and land use synthesis unit(from land use) in systemic classification of agriculture land type in Wanbailin District of Taiyuan City in this paper. Those methods have solved the theory in land classification, as well as the actual puzzle of minimum mapping and evaluation unit that perplexing classification of agricultural land until today. From this methodology Wanbailin District of Taiyuan City in the verge of loess plateau were classified into 10 land type, 42 land subtype and 309 land use synthesis by using object oriented code technique of land resource. With GIS supporting, a 1 ︰35 000 land type map was set up. This method established the theoretical basis and methods of classification of agricultural land using the concept of land type.