One of the key technologies of geomagnetic matching navigation is looking for high accuracy geomagnetic map.Based on introducing the principles of four kinds of interpolation methods(inverse distance to a power method,Kriging method,modified Shepard's method and radial basis function method),the data of geomagnetic survey was used,and a region where the survey points were uniform was selected.Geomagnetic maps were created by all the interpolation methods,and cross-validation was used to estimate the methods...