摘要
图斑的平均坡度是新一轮土地利用更新调查中确定土地利用是否合理的重要参数,但常用的图斑平均坡度 获取方法均存在不同程度的不足。探讨图斑平均坡度的算法原理,以浙江省某县的地形图数据与土地利用更新调 查数据为基准数据,提出由TIN内插成DEM,在此基础上利用ArcGIS得出各土地利用图斑的平均坡度。经验证, 该方法的相对误差在4％以内,平均相对误差为2．2％,精度符合应用要求。
The parcel＇s average slope is a vital parameter,which determines whether land use is rational in the current round of land use updated survey. There are a lot of current methods in contain use,but they all have deficiencies to some degree. In this paper,the arithmetic theory of the parcel＇s average slope is presented concretdy,and the data of relief map and land use updated survey on one county of Zhejiang Province are taken as benchmark data. A better method is put forward that DEM is interpolated by TIN firstly,and then the average slope of every land use parcel is acquired on the basis of the related functions of major software ArcGIS. It is validated that the comparative errors of the result are less than 4% ,and the average comparative error of it is only 2.2% ,so the method is reliable and practical.
出处
《地理与地理信息科学》
CSSCI
CSCD
北大核心
2005年第6期37-40,共4页
Geography and Geo-Information Science
