全要素原则和GRA法在土地定级中的应用

Application of Total Factor Principle and GRA Method in Land Classification

从多因素综合评定法出发,分析因素选取的差异性原则对土地定级估价工作带来的影响,提出以全要素原则来确定土地定级中的因素.通过灰度关联度分析(GRA)法以样点地价代表土地质量作为参考数列,以各定级因子在同一定级单元的单因子作用分值作为比较数列,求取各定级因子对土地质量的关联度,进而求出其权重.分析表明,它可以避免特尔菲法由于过多的主观性参与产生的误差累积,又可以通过建立数学模型,提供相对统一的标准.

Based on the multi-factor assessment method, analyzing the influence of factor selection of the difference principle on land grading, it＇s suggested that the total factor principle would replace the difference principles. By means of gray relative-degree analysis （GRA） method, taking land price of specimen instead of land quality as reference sequence, and taking single-factor effect value of each grade factors on the same grading unit as compare sequence, the relational grade of each grade factors to land quality is calculated, then its weight is also found. This method can solve the error accumulation of Delphi method caused by excess subjective participation, a relative unified standard can be provided by the establishment of model.