| 高精度海洋重力异常格网插值技术研究 |
| |
| 引用本文： | 吴太旗,黄谟涛,欧阳永忠,陆秀平.高精度海洋重力异常格网插值技术研究[J].测绘科学,2008,33(5). |
| |
| 作者姓名： | 吴太旗 黄谟涛 欧阳永忠 陆秀平 |
| |
| 作者单位： | 海军工程大学,电气与信息工程学院,武汉,430033;海军海洋测绘研究所,天津,300061;海军海洋测绘研究所,天津,300061 |
| |
| 基金项目： | 国家自然科学基金，国家自然科学基金 |
| |
| 摘 要： | 通过对当前常用的Kriging方法、改进的二次曲面Shepard方法(MQS)、径向基函数法(RBF)三种格网插值方法进行实验比较和分析,可以得出如下结论:MQS方法插值速度快,整体精度高;RBF插值内部区域精度很高,但是容易在边缘区域出现异常误差,而且计算速度较慢;而Kriging方法在速度上略高于RBF,但精度上要稍低于RBF和MQS。另外,基于插值误差与测区重力异常具有很强相关性的特点及RBF插值方法产生的误差特性,提出了利用光滑因子和边缘数据延拓分别对MQS和RBF方法进行改进的设想,并通过实验进行了验证。
|
| 关 键 词： | 海洋重力 格网 插值 改进shepard 径向基函数法 |
The study of high precision interpolation technology in mrine gravity anomaly |
| |
| WU Tai-qi,HUANG Mo-tao,OUYANG Yong-zhong,LU Xiu-ping.The study of high precision interpolation technology in mrine gravity anomaly[J].Science of Surveying and Mapping,2008,33(5). |
| |
| Authors: | WU Tai-qi HUANG Mo-tao OUYANG Yong-zhong LU Xiu-ping |
| |
| Abstract: | Three usual interpolation methods such as Kriging,modified quadratic shepard(MQS) and radial basis function(RBF) are compared and analyzed in marine gravity anomaly.It shows that the MQS method is the fastest and most accurate,and the RBF method is also good in precision except some abnormity on the edge area,but the calculation speed is the slowest.The Kriging method is not so good in precision as the other two,but faster than the RBF.In addition,two modified ideas to the MQS and RBF are brought out based on the characteristic that the interpolation error has large pertinency with the gravity anomaly and RBF errors just appear in the edge area.Test result shows that the modified methods are effective. |
| |
| Keywords: | marine gravity grid interpolation MQS RBF |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
