【摘要】 以甘肃省定西市城市规划区为例,选择自然因素、社会因素和区域因素为定级因素,借助MapGIS软件将研究区农用地划分为Ⅰ、Ⅱ、Ⅲ、Ⅳ4个级别,并得到了定西市农用地级别成果图.研究表明:定西市农用地整体上呈中心分布,且明显受交通条件和阻碍物的影响;Ⅰ、Ⅲ、Ⅳ级农用地质量在未来一定时期内会保持相对稳定,而Ⅱ级农用地质量会随区域经济发展有较大提高.更多还原

【Abstract】 Traditional methods of farmland grading not only lack accuracy,but also need more manpower and material resources.Application of GIS technology to farmland grading could enhance the precision and efficiency comparing to traditional methods.The authors took the planning area of Dingxi City in Gansu Province as a case study,in which natural factor,social factor and regional factor were selected as the grading factors,and discussed the effectiveness of GIS used in farmland grading.The result showed that the farmland in planning area of the city could be divided into 4 quality grades by MapGIS.The land quality of Ⅰ、Ⅲ and Ⅳ grades may remain relatively stable in the future,white that of Ⅱ grade may increase with the developing of the society economy.更多还原