【摘要】 参考国家制订的《农用地分等定级规程》,利用组件式地理信息系统软件建立了农用地分等信息系统,并应用于湖北省仙桃市的农用地分等评价。首先,确定用于农用地分等的指定作物为中稻和小麦;然后,采用叠置法划分农用地分等单元,根据土壤属性、作物经济数据和分等参数,计算分等单元综合指数;最后,利用等间距法将仙桃市农用地划分为三等,其中以1等为主,1、2、3等农用地分别占77.48%,13.76%,8.76%。更多还原

【Abstract】 Based on the regulation of farmland classification and grading by the National Land Resource Ministry of China,the information system of agroland classification using ComGIS was built and used in Xiantao City of Hubei Province.First,paddy and wheat were taken as appointed crops in classification of cropland.Then,with the data of soil attribute and society economy and indexes of classification,the synthetic indexes of agroland classification unit,which was divied by overlaying soil map,physiognomy map and land use map,was calculated.Finally,according to the method of equal interval,farmland quality was divided into 3 graeds in this area.The grades of classification in this rgeion was mainly in 1 class,and the area in 1,2,3 classes amounts to 77.48%,1376% and 8.76% respectively.更多还原