A stratified research on estimating rice yield in Shanghai underGIS support

摘要

Five factors, such as terrain, the type of land used, soil type,the ratio of rice area to land area and social output of person, areselected to evaluate synthetically the yield level of rice in Shanghai.In order to reflect scientifically the factor effects on total riceyield, the authors adopted the method of stratification analysis todetermine the weight coefficient of every factor. The authors used GIStools to conduct synthetical stratification of the rice yield estimation