摘要
为研究网格间距对克里金网格化结果的影响,通过应用长方体正演公式,建立模型模拟三种不同测线方向的磁测数据,通过计算插值数值与采样数值的绝对误差均方根值,评价网格化效果,并对误差原因进行分析,发现网格化效果和网格数据与采样数据点位的重合程度密切相关,网格点距与采样点距一致时网格化效果较好。
In order to survey the influence of grid spacing on the gridded result by kriging method, the prism forward formula is used to establish the mode to simulate the magnetic data with three different directions of survey line. Mean square root value of absolute error （RMSVAE） from gridded data and theoretical value is calculated, so the accuracy of Krig- ing method and the absolute error of gridding are evaluated and estimated. Then, the rea- sons for RMSVAE are analyzed. According to RMSVAE, it could conclude： the gridded result has an effective relationship with the coincidence degree of grid data point station and sampling data point station; the more consistent the sampling interval and grid spacing are, the more accurate and smaller the RMSVAE is.
出处
《工程地球物理学报》
2015年第4期468-471,共4页
Chinese Journal of Engineering Geophysics
基金
中国地质调查局项目(编号:1212011140094)
关键词
高精度磁测
克里金
网格化
误差
网格点距
重合度
high-precision magnetic measurement
Kriging
gridding
absolute error
gridspacing
coincidence degree
