摘要
在求解高精度的高程异常时,多面函数在理论上可以以任意精度逼近任意复杂曲面,但其核函数与平滑因子的选取,以及定权的方式都会对拟合效果产生很大影响,而移动最小二乘(MLS)多面函数法通过对权函数合理的调整,使不同的待定点建立不同的多面函数模型,有效提高高程异常的拟合逼近精度。
While obtaining the high-accuracy height-anomaly,multi-quadric function interpolation in terms of theory is not bad accuracy to approach the arbitrarily complicated curved surface arbitrarily,but the core-function and smoothing factor,the choice of weight will exceedingly affect the fitting impression.By adjusting rationally the weight function with the multi-quadric function interpolation of MLS,established on the different model of multi-quadric function interpolation to the different point of certainty,effectively improved the fitting accuracy of height-anomaly.
出处
《测绘工程》
CSCD
2011年第5期33-35,共3页
Engineering of Surveying and Mapping
关键词
高程异常
移动最小二乘多面函数
拟合
权
核函数
height-anomaly
multi-quadric function interpolation of moving
least-square fitting
weight
core-function
