摘要
磁偏角地磁图是较理想的确定磁偏角的工具。当需要实时跟踪磁偏角时,可以根据地磁图采集数据建立数据库进行实时查询,但是这种方法工作量较大,过程也比较繁琐。因此,文中提出了一种利用磁偏角地磁图基于二维拉格朗日插值多项式的磁偏角自动计算方法,并详细论述了其原理。实验结果表明,这种方法是可行的,精度较高并可大大提高工作效率。
The geomagnetic declination map is a perfect tool to get the magnetic declination. Establishing a database of the magnetic declination according the map is a solution in real time condition, but this is a hard and boring work. So, a method of automatically computing magnetic declination based on 2D Lagrange interpolation via the geomagnetic declination map is presented. The results of some experiments demonstrate that the method is feasible, has high precision, and can improve the effectiveness
出处
《测绘工程》
CSCD
2007年第1期51-54,共4页
Engineering of Surveying and Mapping
关键词
磁偏角
地磁图
拉格朗日插值
geomagnetic declination
geomagnetic map
Lagrange interpolation
