Study On Methods Of Land Function Classification

At present, the classification of land function is still based on the experience classification, and there is no way to form a complete classification of land function. In order to improve the scientific and rationality of land function classification, this paper explores the new method of classification of land function, and provides technical support for the research of functional classification of land. Through the collection of literature collected a total of 3 a total of 56 categories of land function, classification methods are researched on each kind of function of land According to the different attributes of each function has its own, put forward 3 major categories of 31 characteristics of land function factor To assign the characteristic factor of the land function to obtain the land function score table, then carry on the hierarchical clustering and the K mean cluster analysis. Using mathematical analysis commonly used in R2, semi partial R2, pseudo F and pseudo T2 four statistics of pedigree clustering results of the optimal cluster number of items analysis, the R2 and pseudo F statistic analysis of the optimal cluster number of items of K-means clustering results, selected the optimal cluster number of items. After comparing the classification results with the sequential method, the results of comprehensive land function classification are put forward. The main results are as follows:1) On the collected 18 land ecological function of classification research, by setting 3 categories a total of 13 functional characteristics of land ecological factor, cluster analysis, after analysis of optimal cluster number of items drawn three hierarchical clustering results and a k-means clustering results and order classification results comparative analysis, finally proposed 18 land ecological function will be divided into six categories of the classification results.2) On collected 22 land social function of classification research, by setting 3 categories a total of 10 social function characteristics of land factor, cluster analysis, after analysis of optimal cluster number of items drawn three hierarchical clustering results and a k-means clustering results and order classification results comparative analysis, finally puts forward the 22 land ecological function is divided into eight categories of the classification results.3) Of collected 16 land production functions for classification method, by setting 3 categories a total of 10 land characteristic of production function factor, cluster analysis, after analysis of optimal cluster number of items drawn 2 kind of pedigree clustering results and a k-means clustering results and order classification results comparative analysis, finally puts forward the 16 land ecological function is divided into three class classification results.