Comparison analysis of agricultural land gradation evaluation based on different weight making methods
Agricultural land gradation links land classification and land appraisal.It indicates the difference in agricultural productivity resulted from differences in lands natural characteristics and/or the effectiveness and efficiency of agricultural production at present and in the future.Technically,agricultural land is graded based on the sum of weighted indices and further classified by equal-distance,or axis,or sum frequency curve.It is critical to define the system of weights in this process.In practice,a single or mixed weight system has been widely applied in agricultural land gradation.However,few studies put efforts in comparing outcomes in applying different systems of weights for a specific area.This research applied several popular systems of weights,such as AHP,factor analysis,grey relation analysis,entropy method,and etc.,in gradating agricultural land in Jintan,Jiangsu province.Outcomes resulted from different systems of weights were compared.The result did illustrate the obvious differences among these outcomes,which in turn stood for differences among systems of weights.Considering biases inherent in different systems of weights,a system of combined weights is highly recommended for the general practice in agricultural land gradation.
Agricultural land gradation classification weight making
Xiaobin Jin Honghui Zhang Yinkang Zhou
School of geography and ocean sciences,Nanjing University,Nanjing 210093 School of Info-Physics and Geomatics Engineering,Central South University,Changsha Hunan 410083;Chan
国际会议
第16届国际地理信息科学与技术大会(16th International Conference on GeoInformatics and the Joint Conference)
广州
英文
2008-06-28（万方平台首次上网日期，不代表论文的发表时间）