基于GIS工作平台的农用土地定级方法研究

系统地阐述了基于ＧＩＳ工作平台的农用土地定级因素选择的原则，用网格法和矢量法确定定级单元的方法，建立基础数据库的程序，并对函数法，区域赋值法及空间扩散法等因素因子赋值方法进行了理论分析，提出了以熵为基础建立均质检验的质区的方法，还对加权求和模型与几何平均值模型在综合作用分值计算中的适用范围进行了分析论证。

The Method of Farmland's Grading Based on the Working Platform of GIS

This paper sets forth the principle of selecting factors on farmland's grading based on the working platform of GIS, the way of defimng the grading unit with grid method and vector method, the procedure of making the basic database, and theoretically analyzes the method of elements and factors valuing and puts forward the way of homogeneous region based on entropy. At last anlyzes and tests for calculating the synthetical function grade with the weighed summing modeland geometric average value model.