A geomagnetic mapping approach based on multi-fractal thoery

Geomagnetic anomaly filed is a typical two-dimensional irregular dataset, and high-accuracy map is vital foundation of geomagnetic navigation. Traditional interpolating method could be classified into two categories, one is constructing smooth curve or surface through reference points, and another assign different weights on reference points to make estimation. ICSS (Interpolation and Correction step-by-step) method is proposed, which combine multi-fractal with the second category methods, and well improve their low-pass filter characteristic analyzed in this paper. Experimental results show that it could depict the singularity of small scale more accurately and improve mapping precision.