Research on Approximation Method on Marine Magnetic Anomaly

With the analysis and study of general numerical approximation methods,according to the characteristic of the marine magnetic survey,moving curved surface method,Hardy polyhedral function method,Shepard method and kriging method are emulated and analyzed in case of different interpolation accuracy.Simultaneously, the interpolation accuracy of the four kinds of approximation methods are calculated as example.The results of the emulation and example show that the interpolation accuracy of these methods are different with distributing of known survey point and change of magnetic anomaly.For different instances,this paper summarizes correspondent methods suitable for marine magnetic anomaly approximation.