These difficulties are the bottle and Hinze, 1988 [38] overcome by computing in the frequency domain. Gravity anomaly in the domain space was identified thanks to transformation Furier. The accuracy of this method depends on the accuracy of the transformation between spatial domain and frequency domain. So to be able to apply this method in the handling of the actual document, the first problem to be solved is to increase accuracy. In theory we could fix that by increasing the density of the point of observation and the length of the line. In fact both ways are not always implemented. However this accuracy can also be increased significantly thanks to the application of the method of "slider" is based on the equation of the deflection of the discrete Fourier transform.
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