研究3种常用格网化方法,给出Kriging方法滞后距与变异函数的计算方法,并利用实测重力异常数据对3种方法在不同模型参数下的插值精度作比较。结果表明,3种方法的均方根差别不大,区别在于局部区域的变化。相对而言,在该区域内Kriging方法精度最高,CoKriging次之,Shepard略低。
Three gravity anomaly gridding methods are introduced and analyzed in this paper.The computation of the lag distance and the semi-variogram are studied in detail.Three methods are compared with different parameters using real gravity anomaly data gridding computation.Results show that there is no great difference in precision.Comparatively,the Kriging method shows the best precision in this area.